Personnel Information

写真a

NAGAHORI Masakazu


Job title

Associate Professor

Birth date

1966

Laboratory Address

1-5-45 Yushima Bunkyo-ku Tokyo, Japan

Laboratory Phone number

+83-3-5803-5974

Mail Address

nagahori.gast@tmd.ac.jp

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Campus Career 【 display / non-display 】

  • 1900.01
    -
    2016.02
    Tokyo Medical and Dental University， unedited
  • 2006.04
    -
    2018.03
    Tokyo Medical and Dental University， Faculty of Medicine， Project Associate Professor
  • 2018.04
    -
    2021.09
    Tokyo Medical and Dental University， (Old Organization)Medical Hospital， Central Clinical Facilities， Clinical Research Center， Associate Professor
  • 2021.10
    -
    2022.07
    Tokyo Medical and Dental University， Tokyo Medical and Dental University， Division of Clinical Management， Clinical Research Center， Associate Professor
  • 2022.08
    -
    Now
    Tokyo Medical and Dental University， Tokyo Medical and Dental University， Division of Clinical Management， Clinical Research Center， Associate Professor
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Published Papers & Misc 【 display / non-display 】

  1. Shimizu H, Aonuma Y, Hibiya S, Kawamoto A, Takenaka K, Fujii T, Saito E, Nagahori M, Ohtsuka K, Okamoto R. Long-term efficacy and safety of tofacitinib in patients with ulcerative colitis: 3-year results from a real-world study. Intestinal research. 2024.07; ( PubMed, DOI )

  2. Matsuoka K, Yamazaki H, Nagahori M, Kobayashi T, Omori T, Mikami Y, Fujii T, Shinzaki S, Saruta M, Matsuura M, Yamamoto T, Motoya S, Hibi T, Watanabe M, Fernandez J, Fukuhara S, Hisamatsu T. Correction: Association of ulcerative colitis symptom severity and proctocolectomy with multidimensional patient-reported outcomes: a cross-sectional study. Journal of gastroenterology. 2024.07; 59 (7): 644-646. ( PubMed, DOI )

  3. Vieujean S, Lindsay JO, D'Amico F, Ahuja V, Silverberg MS, Sood A, Yamamoto-Furusho JK, Nagahori M, Watanabe M, Koutroubakis IE, Foteinogiannopoulou K, Avni Biron I, Walsh A, Outtier A, Nordestgaard RLM, Abreu MT, Dubinsky M, Siegel C, Louis E, Dotan I, Reinisch W, Danese S, Rubin DT, Peyrin-Biroulet L. Analysis of Clinical Trial Screen Failures in Inflammatory Bowel Diseases [IBD]: Real World Results from the International Organization for the study of IBD. Journal of Crohn's & colitis. 2024.04; 18 (4): 548-559. ( PubMed, DOI )

  4. Watanabe K, Nojima M, Nakase H, Sato T, Matsuura M, Aoyama N, Kobayashi T, Sakuraba H, Nishishita M, Yokoyama K, Esaki M, Hirai F, Nagahori M, Nanjo S, Omori T, Tanida S, Yokoyama Y, Moriya K, Maemoto A, Handa O, Ohmiya N, Tsuchiya K, Shinzaki S, Kato S, Uraoka T, Tanaka H, Takatsu N, Nishida A, Umeno J, Nakamura M, Mishima Y, Fujiya M, Tsuchida K, Hiraoka S, Okabe M, Toyonaga T, Matsuoka K, Andoh A, Hirota Y, Hisamatsu T, J-COMBAT study group. Trajectory analyses to identify persistently low responders to COVID-19 vaccination in patients with inflammatory bowel disease: a prospective multicentre controlled study, J-COMBAT. Journal of gastroenterology. 2023.10; 58 (10): 1015-1029. ( PubMed, DOI )

  5. Watanabe Kenji, Nojima Masanori, Nakase Hiroshi, Sato Toshiyuki, Matsuura Minoru, Aoyama Nobuo, Kobayashi Taku, Sakuraba Hirotake, Nishishita Masakazu, Yokoyama Kaoru, Esaki Motohiro, Hirai Fumihito, Nagahori Masakazu, Nanjo Sohachi, Omori Teppei, Tanida Satoshi, Yokoyama Yoshihiro, Moriya Kei, Maemoto Atsuo, Handa Osamu, Ohmiya Naoki, Tsuchiya Kiichiro, Shinzaki Shinichiro, Kato Shingo, Uraoka Toshio, Tanaka Hiroki, Takatsu Noritaka, Nishida Atsushi, Umeno Junji, Nakamura Masanao, Mishima Yoshiyuki, Fujiya Mikihiro, Tsuchida Kenji, Hiraoka Sakiko, Okabe Makoto, Toyonaga Takahiko, Matsuoka Katsuyoshi, Andoh Akira, Hirota Yoshio, Hisamatsu Tadakazu, the J-COMBAT study group. 炎症性腸疾患患者における新型コロナウィルス感染症(COVID-19)ワクチンに対する持続的低反応者を同定するための軌跡解析　多施設前向き共同研究、J-COMBAT多施設前向き共同研究(Trajectory analyses to identify persistently low responders to COVID-19 vaccination in patients with inflammatory bowel disease: a prospective multicentre controlled study, J-COMBAT) Journal of Gastroenterology. 2023.10; 58 (10): 1015-1029. ( ichushi )

  6. Matsuoka Katsuyoshi, Yamazaki Hajime, Nagahori Masakazu, Kobayashi Taku, Omori Teppei, Mikami Yohei, Fujii Toshimitsu, Shinzaki Shinichiro, Saruta Masayuki, Matsuura Minoru, Yamamoto Takayuki, Motoya Satoshi, Hibi Toshifumi, Watanabe Mamoru, Fernandez Jovelle, Fukuhara Shunichi, Hisamatsu Tadakazu. 潰瘍性大腸炎症状の重症度および大腸全摘術と多元的患者報告型アウトカムとの相関　横断研究(Association of ulcerative colitis symptom severity and proctocolectomy with multidimensional patient-reported outcomes: a cross-sectional study) Journal of Gastroenterology. 2023.08; 58 (8): 751-765. ( ichushi )

  7. Kitazume Y, Takenaka K, Ohtsuka K, Ozawa Y, Kimura K, Watanabe R, Tsuchiya J, Fujii T, Nagahori M, Watanabe M, Tateishi U. Motility Mapping Quantification Using the Classical Optical Flow Algorithm for Small Bowel Crohn's Disease: Comparison with Balloon-assisted Enteroscopy Findings. Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine. 2023.07; 22 (3): 325-334. ( PubMed, DOI )

  8. Kitazume Yoshio, Takenaka Kento, Ohtsuka Kazuo, Ozawa Yasuo, Kimura Koichiro, Watanabe Ryosuke, Tsuchiya Junichi, Fujii Toshimitsu, Nagahori Masakazu, Watanabe Mamoru, Tateishi Ukihide. 小腸クローン病に対する古典的なオプティカルフローアルゴリズムを用いたmotility mappingの定量化　バルーン小腸内視鏡検査との比較(Motility Mapping Quantification Using the Classical Optical Flow Algorithm for Small Bowel Crohn's Disease: Comparison with Balloon-assisted Enteroscopy Findings) Magnetic Resonance in Medical Sciences. 2023.07; 22 (3): 325-334. ( ichushi )

  9. Takenaka K, Kitazume Y, Kawamoto A, Fujii T, Udagawa Y, Wanatabe R, Shimizu H, Hibiya S, Nagahori M, Ohtsuka K, Sato H, Hirakawa A, Watanabe M, Okamoto R. Serum Leucine-Rich α2 Glycoprotein: A Novel Biomarker for Transmural Inflammation in Crohn's Disease. The American journal of gastroenterology. 2023.06; 118 (6): 1028-1035. ( PubMed, DOI )

  10. Fujiwara S, Kawamoto A, Motobayashi M, Hibiya S, Takenaka K, Shimizu H, Saito E, Fujii T, Nagahori M, Kawata D, Umezawa N, Hosoya T, Yasuda S, Ohtsuka K, Okamoto R. Hemorrhagic gastric ulcer in a patient with Behcet's disease successfully treated with infliximab. DEN open. 2023.04; 3 (1): e196. ( PubMed, DOI )

  11. Fujiwara Shun, Kawamoto Ami, Motobayashi Maiko, Hibiya Shuji, Takenaka Kento, Shimizu Hiromichi, Saito Eiko, Fujii Toshimitsu, Nagahori Masakazu, Kawata Daisuke, Umezawa Natsuka, Hosoya Tadashi, Yasuda Shinsuke, Ohtsuka Kazuo, Okamoto Ryuichi. インフリキシマブが奏効したベーチェット病患者に認められた出血性胃潰瘍(Hemorrhagic gastric ulcer in a patient with Behcet's disease successfully treated with infliximab) DEN Open. 2023.04; 3 (1): 1 of 5-5 of 5. ( ichushi )

  12. Saito Eiko, Ohtsuka Kazuo, Kawamoto Ami, Fujii Toshimitsu, Takenaka Kento, Hibiya Shuji, Shimizu Hiromichi, Nagahori Masakazu, Tomii Shohei, Okamoto Ryuichi. A case of venous stasis colitis possibly caused by eplerenone(タイトル和訳中) Clinical Journal of Gastroenterology. 2023.02; 16 (1): 69-72. ( ichushi )

  13. Saito E, Ohtsuka K, Kawamoto A, Fujii T, Takenaka K, Hibiya S, Shimizu H, Nagahori M, Tomii S, Okamoto R. A case of venous stasis colitis possibly caused by eplerenone. Clinical journal of gastroenterology. 2023.02; 16 (1): 69-72. ( PubMed, DOI )

  14. Nagahori M, Imai T, Nakashoji M, Tairaka A, Fernandez JL. A web-based survey on self-management for patients with inflammatory bowel disease in Japan. PloS one. 2023; 18 (7): e0287618. ( PubMed, DOI )

  15. Shuji Hibiya, Kazuo Ohtsuka, Kento Takenaka, Ami Kawamoto, Yusuke Matsuyama, Yumi Udagawa, Maiko Motobayashi, Hiromichi Shimizu, Toshimitsu Fujii, Eiko Saito, Masakazu Nagahori, Ryuichi Okamoto, Mamoru Watanabe. Mucosal healing of small intestinal stricture is associated with improved prognosis post-dilation in Crohn's disease. BMC Gastroenterol. 2022.05; 22 (1): 218. ( PubMed, DOI )

  16. Isshiki Kyohei, Kamiya Takahiro, Endo Akifumi, Okamoto Kentaro, Osumi Tomoo, Kawai Toshinao, Arai Katsuhiro, Tomizawa Daisuke, Ohtsuka Kazuo, Nagahori Masakazu, Imai Kohsuke, Kato Motohiro, Kanegane Hirokazu. 小児ステロイド抵抗性消化管急性移植片対宿主病に対するベドリズマブ療法(Vedolizumab therapy for pediatric steroid-refractory gastrointestinal acute graft-versus-host disease) International Journal of Hematology. 2022.04; 115 (4): 590-594. ( ichushi )

  17. Hiromichi Shimizu, Toshimitsu Fujii, Kenji Kinoshita, Ami Kawamoto, Shuji Hibiya, Kento Takenaka, Eiko Saito, Masakazu Nagahori, Kazuo Ohtsuka, Mamoru Watanabe, Ryuichi Okamoto. Intravenous tacrolimus is a superior induction therapy for acute severe ulcerative colitis compared to oral tacrolimus. BMC Gastroenterol. 2021.12; 21 (1): 494. ( PubMed, DOI )

  18. Ando Katsuyoshi, Fujiya Mikihiro, Watanabe Kenji, Hiraoka Sakiko, Shiga Hisashi, Tanaka Shinji, Iijima Hideki, Mizushima Tsunekazu, Kobayashi Taku, Nagahori Masakazu, Ikeuchi Hiroki, Kato Shingo, Torisu Takehiro, Kobayashi Kiyonori, Higashiyama Masaaki, Fukui Toshiro, Kagaya Takashi, Esaki Motohiro, Yanai Shunichi, Abukawa Daiki, Naganuma Makoto, Motoya Satoshi, Saruta Masayuki, Bamba Shigeki, Sasaki Makoto, Uchiyama Kazuhiko, Fukuda Katsuyuki, Suzuki Hideo, Nakase Hiroshi, Shimizu Toshiaki, Iizuka Masahiro, Watanabe Mamoru, Suzuki Yasuo, Hisamatsu Tadakazu. 日本における、炎症性腸疾患に合併する動脈および静脈血栓塞栓症による死亡率と重症度進行リスクに関する全国調査(A nationwide survey concerning the mortality and risk of progressing severity due to arterial and venous thromboembolism in inflammatory bowel disease in Japan) Journal of Gastroenterology. 2021.12; 56 (12): 1062-1079. ( ichushi )

  19. Kobayashi T, Ito H, Ashida T, Yokoyama T, Nagahori M, Inaba T, Shikamura M, Yamaguchi T, Hori T, Pinton P, Watanabe M, Hibi T. Efficacy and safety of a new vedolizumab subcutaneous formulation in Japanese patients with moderately to severely active ulcerative colitis. Intestinal research. 2021.10; 19 (4): 448-460. ( PubMed, DOI )

  20. Kato Shu, Shimizu Hiromichi, Tomii Shohei, Uchida Hitoshi, Kawamoto Ami, Hibiya Shuji, Motobayashi Maiko, Takenaka Kento, Fujii Toshimitsu, Saito Eiko, Nagahori Masakazu, Ohtsuka Kazuo, Negi Mariko, Akashi Takumi, Matsuyama Takatoshi, Kinugasa Yusuke, Watanabe Mamoru. 重症不応性潰瘍性大腸炎症例における、顕著なEpstein-Barrウイルス再活性化悪化の原因である可能性(Substantial Epstein-Barr virus reactivation in a case of severe refractory ulcerative colitis: a possible role in exacerbation) Clinical Journal of Gastroenterology. 2021.04; 14 (2): 584-588. ( ichushi )

  21. Kato S, Shimizu H, Tomii S, Uchida H, Kawamoto A, Hibiya S, Motobayashi M, Takenaka K, Fujii T, Saito E, Nagahori M, Ohtsuka K, Negi M, Akashi T, Matsuyama T, Kinugasa Y, Watanabe M. Substantial Epstein-Barr virus reactivation in a case of severe refractory ulcerative colitis: a possible role in exacerbation. Clinical journal of gastroenterology. 2021.04; 14 (2): 584-588. ( PubMed, DOI )

  22. Tsuda Sayaka, Sameshima Azusa, Sekine Michikazu, Kawaguchi Haruna, Fujita Daisuke, Makino Shintaro, Morinobu Akio, Murakawa Yohko, Matsui Kiyoshi, Sugiyama Takao, Watanabe Mamoru, Suzuki Yasuo, Nagahori Masakazu, Murashima Atsuko, Atsumi Tatsuya, Oku Kenji, Mitsuda Nobuaki, Takei Syuji, Miyamae Takako, Takahashi Naoto, Nakajima Ken, Saito Shigeru. 日本における全身性エリテマトーデス(SLE)、関節リウマチ(RA)、炎症性腸疾患(IBD)の妊娠前状態、産科転帰、妊娠中の薬物使用　多施設共同後ろ向き記述的研究(Pre-conception status, obstetric outcome and use of medications during pregnancy of systemic lupus erythematosus(SLE), rheumatoid arthritis(RA) and inflammatory bowel disease(IBD) in Japan: Multi-center retrospective descriptive study) Modern Rheumatology. 2020.09; 30 (5): 852-861. ( ichushi )

  23. Watanabe Kenji, Tanida Satoshi, Inoue Nagamu, Kunisaki Reiko, Kobayashi Kiyonori, Nagahori Masakazu, Arai Katsuhiro, Uchino Motoi, Koganei Kazutaka, Kobayashi Taku, Takeno Mitsuhiro, Ueno Fumiaki, Matsumoto Takayuki, Mizuki Nobuhisa, Suzuki Yasuo, Hisamatsu Tadakazu. 厚生労働科学研究費補助金難治性疾患政策研究事業「腸管ベーチェット病診療ガイドライン2020」(Evidence-based diagnosis and clinical practice guidelines for intestinal Behcet's disease 2020 edited by Intractable Diseases, the Health and Labour Sciences Research Grants) Journal of Gastroenterology. 2020.07; 55 (7): 679-700. ( ichushi )

  24. Hiromichi Shimizu, Toshimitsu Fujii, Shuji Hibiya, Maiko Motobayashi, Kohei Suzuki, Kento Takenaka, Eiko Saito, Masakazu Nagahori, Kazuo Ohtsuka, Mamoru Watanabe. Rapid prediction of 1-year efficacy of tofacitinib for treating refractory ulcerative colitis. Intest Res. 2020.06; 19 (1): 115-Online ahead of print.. ( PubMed, DOI )

  25. Chikako Watanabe, Masakazu Nagahori, Toshimitsu Fujii, Kaoru Yokoyama, Naoki Yoshimura, Taku Kobayashi, Hirokazu Yamagami, Kazuya Kitamura, Kagaya Takashi, Shiro Nakamura, Makoto Naganuma, Shunji Ishihara, Motohiro Esaki, Maria Yonezawa, Reiko Kunisaki, Atsushi Sakuraba, Naoaki Kuji, Soichiro Miura, Toshifumi Hibi, Yasuo Suzuki, Ryota Hokari. Non-adherence to Medications in Pregnant Ulcerative Colitis Patients Contributes to Disease Flares and Adverse Pregnancy Outcomes. Dig Dis Sci. 2020.04; 66 (2): 577-586. ( PubMed, DOI )

  26. Hisamatsu Tadakazu, Kato Shingo, Kunisaki Reiko, Matsuura Minoru, Nagahori Masakazu, Motoya Satoshi, Esaki Motohiro, Fukata Norimasa, Inoue Satoko, Sugaya Takeshi, Sakuraba Hirotake, Hirai Fumihito, Watanabe Kenji, Kanai Takanori, Naganuma Makoto, Nakase Hiroshi, Suzuki Yasuo, Watanabe Mamoru, Hibi Toshifumi, Nojima Masanori, Matsumoto Takayuki. アダリムマブの計画的維持投与を行ったCrohn病におけるチオプリン類の休薬　前向き無作為化臨床試験(DIAMOND2試験)(Withdrawal of thiopurines in Crohn's disease treated with scheduled adalimumab maintenance: a prospective randomised clinical trial(DIAMOND2)) Journal of Gastroenterology. 2019.10; 54 (10): 860-870. ( ichushi )

  27. Kento Takenaka, Toshimitsu Fujii, Kohei Suzuki, Hiromichi Shimizu, Maiko Motobayashi, Shuji Hibiya, Eiko Saito, Masakazu Nagahori, Mamoru Watanabe, Kazuo Ohtsuka. Small Bowel Healing Detected by Endoscopy in Patients With Crohn's Disease After Treatment With Antibodies Against Tumor Necrosis Factor. Clin. Gastroenterol. Hepatol.. 2019.08; 18 (7): 1545-1552. ( PubMed, DOI )

  28. Higashiyama Masaaki, Sugita Akira, Koganei Kazutaka, Wanatabe Kenji, Yokoyama Yoko, Uchino Motoi, Nagahori Masakazu, Naganuma Makoto, Bamba Shigeki, Kato Shingo, Takeuchi Ken, Omori Teppei, Takagi Tomohisa, Matsumoto Satohiro, Nagasaka Mitsuo, Sagami Shintaro, Kitamura Kazuya, Katsurada Takehiko, Sugimoto Ken, Takatsu Noritaka, Saruta Masayuki, Sakurai Toshiyuki, Watanabe Kazuhiro, Nakamura Shiro, Suzuki Yasuo, Hokari Ryota. 日本における高齢潰瘍性結腸炎患者の管理(Management of elderly ulcerative colitis in Japan) Journal of Gastroenterology. 2019.07; 54 (7): 571-586. ( ichushi )

  29. Shintaro Akiyama, Katsuyoshi Matsuoka, Kyoko Fukuda, Shunsuke Hamada, Mikiko Shimizu, Kosaku Nanki, Shinta Mizuno, Hiroki Kiyohara, Mari Arai, Shinya Sugimoto, Yasushi Iwao, Haruhiko Ogata, Tadakazu Hisamatsu, Makoto Naganuma, Maiko Motobayashi, Kohei Suzuki, Kento Takenaka, Toshimitsu Fujii, Eiko Saito, Masakazu Nagahori, Kazuo Ohtsuka, Mayumi Mochizuki, Mamoru Watanabe, Masayuki Hashiguchi, Takanori Kanai. Long-term effect of NUDT15 R139C on hematologic indices in inflammatory bowel disease patients treated with thiopurine. J. Gastroenterol. Hepatol.. 2019.05; 34 (10): 1751-1757. ( PubMed, DOI )

  30. Hisamatsu T, Kunisaki R, Nakamura S, Tsujikawa T, Hirai F, Nakase H, Watanabe K, Yokoyama K, Nagahori M, Kanai T, Naganuma M, Michimae H, Andoh A, Yamada A, Yokoyama T, Kamata N, Tanaka S, Suzuki Y, Hibi T, Watanabe M, CERISIER Trial group. Effect of elemental diet combined with infliximab dose escalation in patients with Crohn's disease with loss of response to infliximab: CERISIER trial. Intestinal research. 2018.07; 16 (3): 494-498. ( PubMed, DOI )

  31. Fumihiko Iwamoto, Katsuyoshi Matsuoka, Maiko Motobayashi, Kento Takenaka, Toru Kuno, Keisuke Tanaka, Yuya Tsukui, Shoji Kobayashi, Takashi Yoshida, Toshimitsu Fujii, Eiko Saito, Tatsuya Yamaguchi, Masakazu Nagahori, Tadashi Sato, Kazuo Ohtsuka, Nobuyuki Enomoto, Mamoru Watanabe. Prediction of disease activity of Crohn's disease through fecal calprotectin evaluated by balloon-assisted endoscopy. J. Gastroenterol. Hepatol.. 2018.06; 33 (12): 1984-1989. ( PubMed, DOI )

  32. Taku Kobayashi, Tadakazu Hisamatsu, Yasuo Suzuki, Haruhiko Ogata, Akira Andoh, Toshimitsu Araki, Ryota Hokari, Hideki Iijima, Hiroki Ikeuchi, Yoh Ishiguro, Shingo Kato, Reiko Kunisaki, Takayuki Matsumoto, Satoshi Motoya, Masakazu Nagahori, Shiro Nakamura, Hiroshi Nakase, Tomoyuki Tsujikawa, Makoto Sasaki, Kaoru Yokoyama, Naoki Yoshimura, Kenji Watanabe, Miiko Katafuchi, Mamoru Watanabe, Toshifumi Hibi. Predicting outcomes to optimize disease management in inflammatory bowel disease in Japan: their differences and similarities to Western countries. Intest Res. 2018.04; 16 (2): 168-177. ( PubMed, DOI )

  33. Shintaro Akiyama, Masakazu Nagahori, Shinya Oooka, Mariko Negi, Takashi Ito, Kento Takenaka, Kazuo Ohtsuka, Mamoru Watanabe. Small intestinal obstruction due to the metastasis of intrahepatic cholangiocarcinoma: A case report. Medicine (Baltimore). 2018.03; 97 (12): e0190. ( PubMed, DOI )

  34. Matsuoka Katsuyoshi, Kobayashi Taku, Ueno Fumiaki, Matsui Toshiyuki, Hirai Fumihito, Inoue Nagamu, Kato Jun, Kobayashi Kenji, Kobayashi Kiyonori, Koganei Kazutaka, Kunisaki Reiko, Motoya Satoshi, Nagahori Masakazu, Nakase Hiroshi, Omata Fumio, Saruta Masayuki, Watanabe Toshiaki, Tanaka Toshiaki, Kanai Takanori, Noguchi Yoshinori, Takahashi Ken-ichi, Watanabe Kenji, Hibi Toshifumi, Suzuki Yasuo, Watanabe Mamoru, Sugano Kentaro, Shimosegawa Tooru, Guidelines Committee for Creating and Evaluating the"Evidence-Based Clinical Practice Guidelines for Inflammatory Bowel Disease in Japan",The Japanese Society of Gastroenterology(JSGE). 炎症性腸疾患に関する根拠に基づく診療ガイドライン(Evidence-based clinical practice guidelines for inflammatory bowel disease) Journal of Gastroenterology. 2018.03; 53 (3): 305-353. ( ichushi )

  35. Kento Takenaka, Kazuo Ohtsuka, Yoshio Kitazume, Katsuyoshi Matsuoka, Masakazu Nagahori, Toshimitsu Fujii, Eiko Saito, Maiko Kimura, Tomoyuki Fujioka, Mamoru Watanabe. Utility of Magnetic Resonance Enterography For Small Bowel Endoscopic Healing in Patients With Crohn's Disease.[Epub ahead of print] Am. J. Gastroenterol.. 2017.12; 113 (2): 283-294. ( PubMed, DOI )

  36. Kenji Watanabe, Takayuki Matsumoto, Tadakazu Hisamatsu, Hiroshi Nakase, Satoshi Motoya, Naoki Yoshimura, Tetsuya Ishida, Shingo Kato, Tomoo Nakagawa, Motohiro Esaki, Masakazu Nagahori, Toshiyuki Matsui, Yuji Naito, Takanori Kanai, Yasuo Suzuki, Masanori Nojima, Mamoru Watanabe, Toshifumi Hibi, . Clinical and pharmacokinetic factors associated with adalimumab-induced mucosal healing in patients with Crohn's disease.[Epub ahead of print] Clin. Gastroenterol. Hepatol.. 2017.11; 16 (4): 542-+. ( PubMed, DOI )

  37. Takenaka Kento, Ohtsuka Kazuo, Kitazume Yoshio, Matsuoka Katsuyoshi, Fujii Toshimitsu, Nagahori Masakazu, Kimura Maiko, Fujioka Tomoyuki, Araki Akihiro, Watanabe Mamoru. クローン病における小腸狭窄の磁気共鳴評価　バルーン小腸内視鏡検査との比較(Magnetic resonance evaluation for small bowel strictures in Crohn's disease: comparison with balloon enteroscopy) Journal of Gastroenterology. 2017.08; 52 (8): 879-888. ( ichushi )

  38. Masakazu Nagahori, Shuji Kochi, Hiroyuki Hanai, Takayuki Yamamoto, Shiro Nakamura, Soji Omuro, Mamoru Watanabe, Toshifumi Hibi, . Real life results in using 5-ASA for maintaining mild to moderate UC patients in Japan, a multi-center study, OPTIMUM Study. BMC Gastroenterol. 2017.04; 17 (1): 47. ( PubMed, DOI )

  39. Kuwahara Erika, Murakami Yoshitaka, Nakamura Takahiro, Inoue Nagamu, Nagahori Masakazu, Matsui Toshiyuki, Watanabe Mamoru, Suzuki Yasuo, Nishiwaki Yuji. 新たに診断された軽度潰瘍性大腸炎の増悪に関連する因子に関する日本の全国登録に基づいた研究(Factors associated with exacerbation of newly diagnosed mild ulcerative colitis based on a nationwide registry in Japan) Journal of Gastroenterology. 2017.02; 52 (2): 185-193. ( ichushi )

  40. Toshiaki Watanabe, Yoichi Ajioka, Keiichi Mitsuyama, Kenji Watanabe, Hiroyuki Hanai, Hiroshi Nakase, Reiko Kunisaki, Keiji Matsuda, Ryuichi Iwakiri, Nobuyuki Hida, Shinji Tanaka, Yoshiaki Takeuchi, Kazuo Ohtsuka, Kazunari Murakami, Kiyonori Kobayashi, Yasushi Iwao, Masakazu Nagahori, Bunei Iizuka, Keisuke Hata, Masahiro Igarashi, Ichiro Hirata, Shin-Ei Kudo, Takayuki Matsumoto, Fumiaki Ueno, Gen Watanabe, Masahiro Ikegami, Yoko Ito, Koji Oba, Eisuke Inoue, Naoki Tomotsugu, Toru Takebayashi, Kenichi Sugihara, Yasuo Suzuki, Mamoru Watanabe, Toshifumi Hibi. Comparison of Targeted vs Random Biopsies for Surveillance of Ulcerative Colitis-Associated Colorectal Cancer. Gastroenterology. 2016.12; 151 (6): 1122-1130. ( PubMed, DOI )

  41. Kento Takenaka, Kazuo Ohtsuka, Yoshio Kitazume, Katsuyoshi Matsuoka, Toshimitsu Fujii, Masakazu Nagahori, Maiko Kimura, Tomoyuki Fujioka, Akihiro Araki, Mamoru Watanabe. Magnetic resonance evaluation for small bowel strictures in Crohn's disease: comparison with balloon enteroscopy. [Epub ahead of print] J. Gastroenterol.. 2016.11; 52 (8): 879-888. ( PubMed, DOI )

  42. Kento Takenaka, Kazuo Ohtsuka, Yoshio Kitazume, Masakazu Nagahori, Toshimitsu Fujii, Eiko Saito, Tomoyuki Fujioka, Katsuyoshi Matsuoka, Makoto Naganuma, Mamoru Watanabe. Correlation of the Endoscopic and Magnetic Resonance Scoring Systems in the Deep Small Intestine in Crohn's Disease. Inflamm. Bowel Dis.. 2015.05; ( PubMed, DOI )

  43. Satoko Ohfuji, Wakaba Fukushima, Kenji Watanabe, Satoshi Sasaki, Hirokazu Yamagami, Masakazu Nagahori, Mamoru Watanabe, Yoshio Hirota, . Pre-illness isoflavone consumption and disease risk of ulcerative colitis: a multicenter case-control study in Japan. PLoS ONE. 2014.10; 9 (10): e110270. ( PubMed, DOI )

  44. Kento Takenaka, Kazuo Ohtsuka, Yoshio Kitazume, Masakazu Nagahori, Toshimitsu Fujii, Eiko Saito, Makoto Naganuma, Akihiro Araki, Mamoru Watanabe. Comparison of magnetic resonance and balloon enteroscopic examination of the small intestine in patients with Crohn's disease. Gastroenterology. 2014.08; 147 (2): 334-342.e3. ( PubMed )

  45. Makoto Naganuma, Yasuo Suzuki, Katsuyoshi Matsuoka, Reiko Kunisaki, Naoki Yoshimura, Masakazu Nagahori, Mamoru Watanabe. [Clinical relevance of tacrolimus trough levels in outpatients with active ulcerative colitis]. Nihon Shokakibyo Gakkai Zasshi. 2014.02; 111 (2): 276-287. ( PubMed )

  46. Toshimitsu Fujii, Makoto Naganuma, Yoshio Kitazume, Eiko Saito, Masakazu Nagahori, Kazuo Ohtsuka, Mamoru Watanabe. Advancing magnetic resonance imaging in Crohn's disease. Digestion. 2014.01; 89 (1): 24-30. ( PubMed, DOI )

  47. Tadakazu Hisamatsu, Fumiaki Ueno, Takayuki Matsumoto, Kiyonori Kobayashi, Kazutaka Koganei, Reiko Kunisaki, Fumihito Hirai, Masakazu Nagahori, Mitsunobu Matsushita, Kenji Kobayashi, Mitsumasa Kishimoto, Mitsuhiro Takeno, Masanori Tanaka, Nagamu Inoue, Toshifumi Hibi. The 2nd edition of consensus statements for the diagnosis and management of intestinal Behçet's disease: indication of anti-TNFα monoclonal antibodies. J. Gastroenterol.. 2014.01; 49 (1): 156-162. ( PubMed, DOI )

  48. Eiko Saito, Masakazu Nagahori, Toshimitsu Fujii, Kazuo Ohtsuka, Mamoru Watanabe. Efficacy of salvage therapy and its effect on operative outcomes in patients with ulcerative colitis. Digestion. 2014.01; 89 (1): 55-60. ( PubMed, DOI )

  49. Masakazu Nagahori, Toshimitsu Fujii, Eiko Saito, Kazuo Ohtsuka, Mamoru Watanabe. Biologics treatment for ulcerative colitis. Nihon Shokakibyo Gakkai Zasshi. 2013.11; 110 (11): 1909-1915. ( PubMed )

  50. Makoto Naganuma, Toshimitsu Fujii, Reiko Kunisaki, Naoki Yoshimura, Masakazu Takazoe, Yoshiaki Takeuchi, Eiko Saito, Masakazu Nagahori, Keiko Asakura, Toru Takebayashi, Mamoru Watanabe. Incidence and characteristics of the 2009 influenza (H1N1) infections in inflammatory bowel disease patients. J Crohns Colitis. 2013.05; 7 (4): 308-313. ( PubMed, DOI )

  51. Makoto Naganuma, Masakazu Nagahori, Toshimitsu Fujii, Junko Morio, Eiko Saito, Mamoru Watanabe. Poor recall of prior exposure to varicella zoster, rubella, measles, or mumps in patients with IBD. Inflamm. Bowel Dis.. 2013.02; 19 (2): 418-422. ( PubMed, DOI )

  52. Masakazu Nagahori, Sea Bong Hyun, Teruji Totsuka, Ryuichi Okamoto, Erika Kuwahara, Toru Takebayashi, Makoto Naganuma, Mamoru Watanabe. Prevalence of metabolic syndrome is comparable between inflammatory bowel disease patients and the general population. J. Gastroenterol.. 2010.10; 45 (10): 1008-1013. ( PubMed, DOI )

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Books etc 【 display / non-display 】

  1. Masakazu Nagahori. Diagnosis of Ulcerative Colitis:Typical Findings and Diagnostic Criteria. Springer， 2018.11 Part Ⅱ Endoscopic Diagnosis of IBD

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Conference Activities & Talks 【 display / non-display 】

  1. T. Fujii , S. Hibiya , H. Shimizu , A. Kawamoto , K. Takenaka , E. Saito , M. Nagahori , K. Ohtsuka , R. Okamoto. DUAL THERAPY WITH CAROTEGRAST (AJM300: ORAL α4 INTEGRIN ANTAGONIST) AND BIOLOGICS FOR REFRACTORY ULCERATIVE COLITIS. UEGW2023 2023.10.15

  2. 土屋輝一郎、長堀正和、日比谷秀爾、竹中健人、河本亜美、清水寛路、藤井俊光、齊藤詠子、大塚和朗、渡辺　守、岡本隆一 . 【誌面発表】COVID-19蔓延下におけるスマートデバイスを用いたIBD病診連携に関する研究. 厚生労働科学研究費 難治性疾患政策研究事業 「難治性炎症性腸管障害に関する調査研究」令和3年度 第1回総会 2021.07.15 Web開催

  3. Toshimitsu Fujii, Shuji Hibiya, Chiaki Maeyashiki, Eiko Saito, Kento Takenaka, Maiko Motobayashi, Hiromichi Shimizu, Masakazu Nagahori, Kazuo Ohtsuka, Masayuki Kurosaki, Tsunehito Yauchi, Mamoru Watanabe. Intolerance to 5-aminosalicylate is a risk of poor prognosis in Ulcerative colitis patients.. ECCO2020 2020.02.14 Vienna（Austria）

  4. 藤井俊光、日比谷秀爾、齊藤詠子、竹中健人、清水寛路、長堀正和、大塚和朗、黒崎雅之、矢内常人、泉 並木、渡辺 守. 潰瘍性大腸炎における5ASA不耐は予後不良因子となる. 日本消化器病関連学会週間(JDDW)2019 2019.11.21 神戸コンベンションセンター

  5. Eiko Saito, Kohei Suzuki, Shuuji Hibiya, Maiko Motobayashi, Kento Takenaka, Nobukatsu Horita, Hiromichi Shimizu, Michio Onizawa, Toshimitsu Fujii, Masakazu Nagahori, Kazuo Ohtsuka, Mamoru Watanabe. The clinical efficacy of ustekinumab (UST) in patients with Crohn’s disease (CD). AOCC2019 2019.06.15 台北

  6. Kento Takenaka, Kazuo Ohtsuka, Toshimitsu Fujii, Kohei Suzuki, Hiromichi Shimizu, Maiko Motobayashi, Shuji Hibiya, Eiko Saito, Masakazu Nagahori, Mamoru Watanabe. Small bowel endoscopic healing of Crohn’s disease treated with anti-TNF antibodies. The 7th Annual Meeting of Asian Organization for Crohn's and Colitis (AOCC 2019) 2019.06.15 台北

  7. 齊藤詠子、秋山慎太郎、鈴木康平、本林麻衣子、竹中健人、清水寛路、鬼澤道夫、藤井俊光、長堀正和、大塚和朗、渡辺　守. クローン病における抗TNF-α抗体二次無効時のウステキヌマブの治療成績について. 第9回日本炎症性腸疾患学会学術集会 2018.11.22 メルパルク京都（京都府京都市）

  8. Takenaka K, Ohtsuka K, Fujii T, Nagahori M, Saito E, Motobayashi M, Suzuki K, Watanabe M. Small bowel mucosal healing of Crohn’s disease treated with anti-TNF antibodies. FALKシンポジウム 2018.09.07 京都ホテルオークラ（京都府京都市）

  9. Saito　E, Suzuki K, Shimizu H, Motobayashi M, Takenaka K, Onizawa M, Fujii T, Nagahori M, Ohtsuka K, Watanabe M. The clinical efficacy of switching cases between Infliximab(IFX) andAdalimumab(ADA) in patients with ulcerative colitis. AOCC2018 2018.06.22 Shanghai

  10. Ohtsuka K, Takenaka K, Suzuki K, Fujii T, Nagahori M, Matsuoka K, Saito E, Katsukura N, Fukuda M, Araki A, Watanabe M. Usefulness of single-balloon enteroscopy: from a single center 990 experiences. DDW2018 2018.06.03 Washington D.C (USA）

  11. Toshimitsu Fujii, Yoshio Kitazume, Kento Takenaka, Maiko Kimura,Eiko Sito, Katsuyoshi Matsuoka, Masakazu Nagahori, Kazuo Ohtsuka, Mamoru Watanabe. Simplified MR enteroclonography Classification Based on Endoscopic Findings for Activity Assessment of Crohn's Disease. UEGW2017 (欧州消化器病学会週間2017） 2017.11.01 Barcelona(Spain)

  12. T. Fujii Y. Kitazume K. Takenaka M. Kimura E. Saito K. Matsuoka M. Nagahori K. Ohtsuka M. Watanabe. Simplified MR enterocolonography Classification Based on Endoscopic Findings for Activity Assessment of Crohn’s Disease. UEGW2017 (欧州消化器病学会週間2017） 2017.11.01 Barcelona(Spain)

  13. K. Takenaka K. Ohtsuka Y. Kitazume T. Fujii K. Matsuoka M. Kimura M. Nagahori M. Watanabe. Utility of Magnetic Resonance Evaluation for Small Bowel Endoscopic Healing in Patients with Crohn’s Disease. UEGW2017 (欧州消化器病学会週間2017） 2017.11.01 Barcelona(Spain)

  14. Takenaka K, Ohtsuka K, Kitazume Y, Fujii T, Matsuoka K, Kimura M, Nagahori M, Watanabe M. Utility of Magnetic Resonance Evaluation for Small Bowel Endoscopic Healing in Patients with Crohn’s Disease. UEGW2017 (欧州消化器病学会週間2017） 2017.10.30 Barcelona(Spain)

  15. Takenaka K, Ohtsuka K, Kitazume Y, Matsuoka K, Fujii T, Nagahori M, Kimura M, Watanabe M.. Magnetic resonance enterography for small bowel mucosal healing in patients with Crohn’s disease.. APDW2017 2017.09.23 Hong Kong Convention and Exhibition Centre（香港）

  16. Motobayashi M, Matsuoka K, Iwamoto F, Takenaka K, Fujii T, Nagahori M, Enomoto N, Ohtsuka K, Watanabe M. Correlation of Fecal Calprotectin Levels with Endoscopic Severity Evaluated with Balloon-assisted Endoscopy in Patients with Crohn’s Disease. . AOCC2017 2017.06.17 Seoul, Korea

  17. Fujii T, Kitazume Y, Takenaka K, Kimura M, Matsuoka K, Nagahori M, Ohtsuka K, Watanabe M. The 5-point MR enterocolonography classification based on endoscopic findings for activity assessment of Crohn's disease. AOCC2017 2017.06.16 Seoul, Korea

  18. Kento Takenaka, Kazuo Ohtsuka, Yoshio Kitazume, Katsuyoshi Matsuoka, Toshimitsu Fujii, Masakazu Nagahori, Maiko Kimura, Mamoru Watanabe. Magnetic resonance evaluation for small bowel endoscopic remission in patients with crohn’s disease.. AOCC2017 2017.06.15 Seoul, Korea

  19. Nibe　Y, Oshima S, Aonuma E, Matsuda H, Otsubo K, Maeyashiki C, Kobayashia M, Matsuzawa Y , Nakada S, Watanabe M. Novel polyubiquitin imaging reveals that atypical polyubiquitin contribute to autophagy.. GI research Academy 2017 2017.06.09 経団連会館（東京都千代田区）

  20. Toshimitsu Fujii, Kento Takenaka, Maiko Kimura, Katsuyoshi Matsuoka, Masakazu Nagahori, Kazuo Ohtsuka, Mamoru Watanabe. MR enterocolonography evaluation for small bowel strictures in patients with Crohn’s disease: comparison with balloon enteroscopy. UEGW2016 2016.10.18 VIENNA

  21. 渡辺憲冶、松本主之、仲瀬裕志、久松理一、平井郁仁、小林清典、国崎玲子、長堀正和、竹内　健、大藤さとこ、福島若葉、梁井俊一、稲場勇平、藤谷幹浩、櫻庭裕丈、遠藤克哉、勝野達郎、大森鉄平、飯塚文瑛、小林　拓、秋山純一、本田　穣、佐藤　公、佐々木誠人、谷田諭史、加賀谷尚史、馬場重樹、安藤　朗、内藤裕二、深田憲将、岡崎和一、細見周平、湯川知洋、鎌田紀子、山上博一、宮嵜孝子、中村志郎、松浦　稔、亀田昌司、石田哲也、松本吏弘、金城福則、金城　徹、上野義隆、田中信治、渡辺知佳子、穂苅量太、高橋索真、進士明宏、北村和哉、辻川知之、山下真幸、長沼　誠、鈴木康夫、上野文昭、日比紀文、渡辺　守. 【的確な診断・治療の確立プロジェクト―治療面から―】特殊型炎症性腸疾患におけるアダリムマブとステロイドの前向き無作為化比較試験Castle Study：国内多施設共同試験. 厚生労働科学研究費補助金難治性疾患等政策研究事業「難治性炎症性腸管障害に関する調査研究」班　平成28年度第1回総会 2016.07.21 東京医科歯科大学 鈴木章夫記念講堂（東京都文京区）

  22. Ohtsuka K, Takenaka K, Fujii T, Matsuoka K, Nagahori M, Kimura M, Fukuda M, Katsukura N, Watanabe M. Mucosal healing improves prognosis of endoscopic balloon dilatatiion for small intestinal strictures of Crohn's disease. AOCC2016 2016.07.09 Kyoto

  23. Toshimitsu Fujii, Kento Takenaka, Maiko Kimura, Katsuyoshi Matsuoka, Masakazu Nagahori, Kazuo Ohtsuka, Mamoru Watanabe. The evaluation for small bowel strictures on MR enterocolonography in patients with Crohn’s disease. AOCC2016 2016.07.08 Kyoto

  24. Masakazu Nagahori. Anal fistula - Seton first or anti-TNF first : anti-TNF first. AOCC2016 2016.07.07 Kyoto

  25. Kazuo Ohtsuka, Kento Takenaka, Toshimitsu Fujii, Katsuyoshi Matsuoka, Masakazu Nagahori, Maiko Kimura, Masayoshi Fukuda, Nobuhiro Katsukura, Mamoru Watanabe. Mucosal healing improves prognosis of endoscopic balloon dilatation for small intestinal strictures of Crohn’s disease. AOCC2016 2016.07.07 Kyoto

  26. Maiko Kimura, Katsuyoshi Matsuoka, Eiko Saito, Toshimitsu Fujii, Kento Takenaka, Masakazu Nagahori, Kazuo Ohtsuka, Mamoru Watanabe. Salvage therapy for corticosteroid-refractory ulcerative colitis patients.. AOCC2016 2016.07.07 Kyoto

  27. Kento Takenaka, Kazuo Ohtsuka, Yoshio Kitazume, Masakazu Nagahori, Katsuyoshi Matsuoka, Toshimitsu Fujii, Maiko Kimura, Tomoyuki Fujioka, Mamoru Watanabe. Enteroscopic and MR findings of small bowel in Crohn’s disease. AOCC2016 2016.07.07 Kyoto

  28. Kazuo Ohtsuka, Kento Takenaka, Toshimitsu Fujii, Katsuyoshi Matsuoka, Masakazu Nagahori, Kengo Nozaki, Masayoshi Fukuda, Mamoru Watanabe. Mucosal Healing is imoietant for better outcomes of endosdopic balloon dilatation for smakk intestinal stricture of crohn's disease. DDW2016 2016.05.23 San Diego

  29. Takenaka K, Ohtsuka K, Kitazume Y, Nagahori M, Matsuoka K, Fujii T, Kimura M, Fujioka T, Watanabe M. Enteroscopic and MR findings of small intestine in Crohn’s disease.. 7th APTC 2016.04.20 京王プラザホテル（新宿区）

  30. K. Matsuoka, E. Saito, T. Fujii, K. Takenaka, F. Iwamoto, M. Kimura, M. Nagahori, K. Ohtsuka, M. Watanabe. Efficacy and safety of sequential rescue therapy with infliximab and tacrolimus in patients with corticosteroid-refractory Ulcerative Colitis. 11th Congress of ECCO - European Crohn‘s and Colitis Organisation 2016.03.19 Amsterdam

  31. T. Matsumoto, S. Motoya, K. Watanabe, T. Hisamatsu, H. Nakase, N. Yoshimura, T. Ishida, S. Kato, T. Nakagawa, M. Esaki, M. Nagahori, T. Matsui, Y. Naito, T. Kanai, Y. Suzuki, M. Nojima, M. Watanabe, T. Hibi. Comparison of adalimumab monotherapy and a combination with azathioprine for patients with Crohn’s Disease: A prospective, multicentre, open-labeled clinical trial (DIAMOND study). 11th Congress of ECCO - European Crohn‘s and Colitis Organisation 2016.03.18

  32. Fujii T,Takenaka K,Kitazume Y,Saito E,Matsuoka K,Nagahori M,Ohtsuka K,Watanabe M.. Modifying and validating endoscopic and magnetic resonance scoring systems for the deep small intestine in Crohn’s disease.. AOCC2015 2015.06.19 Beijing

  33. Toshimitsu Fujii, Kento Takenaka, Eiko Saito, Katsuyoshi Matsuoka, Masakazu Nagahori, Kazuo Ohtsuka, Mamoru Watanabe. Modifying and Validating Endoscopic and Magnetic Resonance Scoring Systems for the Deep Small Intestine in Crohn's Disease. DDW 2015 2015.05.17 Washington, D.C.

  34. Masakazu Nagahori, Mamoru Watanabe. The Prognosis of Ulcerative Colitis Patients Who Are Treated With Corticosteroid in an Academic Inflammatory Bowel Disease Center and Community Hospitals. DDW 2015 2015.05.16 Washington, D.C.

  35. Matsuoka K, Saito E, Fujii T, Takenaka K, Nagahori M, Ohtsuka K, Watanabe M. The Ulcerative Colitis Endscopic Index of Severity (UCEIS) is useful to evaluate endoscopic improvement and to predict medium-term prognosis in Ulcerative Colitis patients treated with tacrolimus. 10th Congress of ECCO - Inflammatory Bowel Diseases 2015 2015.02.20 Barcelona

  36. Takenaka K, Ohtsuka K, Kitazume Y, Nagahori M, Fujii T, Saito E, Watanabe M. Magnetic resonance enterocolonography can detect small intestinal active lesions in crohn's disease;comparison with balloon enteroscopy. UEGW2014 2014.10.20 Vienna

  37. Fujii T, Naganuma M, Kitazume Y, Takenaka K, Nagahori M, Saito E, Ohtsuka K, Watanabe M. MR enterocolonography can identify patients who need additional treatment by predicting recurrence, hospitalization and surgey of Crohn's disease patients in remission. UEGW2014 2014.10.20 Vienna

  38. Saito E, Nagahori M, Waranabe M. Outcome of induction and maintenance therapy for refractory ulceractry colitis. The 2nd Annual Meeting of AOCC 2014.06.20 Seoul

  39. Takenaka K, Otsuka K, Nagahori M, Fujii T, Saito E, Watanabe M. Comparison of Magnetic Resonance and Balloon Enteroscopic Examination of Deep Small Intestine in Patients with Crohn's Disease. The 2nd Annual Meeting of AOCC 2014.06.20 Seoul

  40. Takenaka K, Otsuka K, Nagahori M, Fujii T, Saito E, Watanabe M. Comparing MR enterocolonography to enteroscopy in Crohn's disease, especially focusing on small intestinal findings. 9th congress of European Crohn's and Colitis Organisation 2014.02.20 Copenhagen

  41. Fujii T, Naganuma M, Saito E, Nagahori M, Watanabe M. Intravenous tacrolimus therapy can rapidly induce remission in refractory ulcerative colitis. DDW2012 2012.05.19 San Diego

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