Personnel Information

写真a

HANAZAWA Ryouichi


Job title

Assistant Professor
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Graduate School 【 display / non-display 】

  • The University of Tokyo, Master's Course, 2020.03, Completed

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Campus Career 【 display / non-display 】

  • 2020.04
    -
    2021.03
    Tokyo Medical and Dental University， (Old Organization)Medical Hospital， Central Clinical Facilities， Clinical Research Center， Project Researcher
  • 2021.04
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    2021.05
    Tokyo Medical and Dental University， Graduate School of Medical and Dental Sciences， Medical and Dental Sciences， Division of Public Health， Department of Global Health Promotion， Graduate Student
  • 2021.06
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    2024.09
    Tokyo Medical and Dental University， Graduate School of Medical and Dental Sciences， Medical and Dental Sciences， Division of Public Health， Department of Clinical Biostatistics， Graduate Student
  • 2022.04
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    2023.02
    Tokyo Medical and Dental University， ， Medical Innovation Promotion Center， Project Assistant Professor
  • 2023.03
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    Now
    Institute of Science Tokyo， -， -， Project Assistant Professor
  • 2024.10
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    2025.03
    Institute of Science Tokyo， -， Graduate Schools， Public Health， Department of Clinical Biostatistics， Graduate Student
  • 2025.04
    -
    Now
    Institute of Science Tokyo， -， Institute of Science Tokyo Hospital， Health Science Research and Development Center， Assistant Professor

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Published Papers & Misc 【 display / non-display 】

  1. Hanazawa, R; Sato, H; Hirakawa, A; Alzheimers Dis Neuroimaging Initiative. Mixture Disease Progression Model to Predict and Cluster the Long-Term Trajectory of Cognitive Decline in Alzheimer's Disease THERAPEUTIC INNOVATION & REGULATORY SCIENCE. 2024.12; ( PubMed, DOI )

  2. Fujimaru T, Mori T, Sekine A, Chiga M, Mandai S, Kikuchi H, Mori Y, Hara Y, Fujiki T, Ando F, Susa K, Iimori S, Naito S, Hanazawa R, Hirakawa A, Mochizuki T, Suwabe T, Ubara Y, Uchida S, Sohara E. Importance of IFT140 in Patients with Polycystic Kidney Disease Without a Family History. Kidney international reports. 2024.09; 9 (9): 2685-2694. ( PubMed, DOI )

  3. Hirai S, Hanazawa R, Yoshimura M, Shigeta K, Sato Y, Taira N, Kawano Y, Karakama J, Obata Y, Hara M, Yamada K, Ishii Y, Sawada K, Imae S, Wakabayashi H, Sagawa H, Fujita K, Fujii S, Takahashi S, Hirakawa A, Nemoto S, Sumita K. Safety and Efficacy of Management for Intraprocedural Rupture During Endovascular Treatment for Intracranial Aneurysms. Neurosurgery. 2024.08; ( PubMed, DOI )

  4. Murofushi K, Katagiri H, Mitomo S, Hirohata K, Furuya H, Hanazawa R, Hirakawa A, Yagishita K, Kaneoka K. Exploring age-related changes in motor function: insights from the peak decline found in Koji Awareness screening test. Scientific reports. 2024.08; 14 (1): 18903. ( PubMed, DOI )

  5. Takahashi Y, Kobori A, Hiroshima K, Sakamoto Y, Kimura M, Inaba O, Tanimoto K, Hanazawa R, Hirakawa A, Goya M, Sasano T. MAP-AF: A Multicenter, Single-Blind, Randomized Controlled Trial. Circulation. Arrhythmia and electrophysiology. 2024.07; 17 (8): e012829. ( PubMed, DOI )

  6. Ohara M, Hirata K, Matsubayashi T, Chen Q, Shimano K, Hanazawa R, Hirakawa A, Yokota T, Hattori T. Circular walking is useful for assessing the risk of falls in early progressive supranuclear palsy. Journal of neurology. 2024.07; 271 (9): 6349-6358. ( PubMed, DOI )

  7. Yamaoka H, Hirai S, Hanazawa R, Yoshimura M, Hayashi T, Kaneoka A, Yamada K, Yoshino Y, Ebiko Y, Yamamura T, Ishikawa M, Sagawa H, Aoyama J, Fujii S, Fujita K, Kawano Y, Hirakawa A, Sumita K. A thoracic CT imaging parameter predicting access difficulty in acute stroke thrombectomy. Clinical neurology and neurosurgery. 2024.07; 244 108453. ( PubMed, DOI )

  8. Kato, M; Shiota, M; Kimura, T; Hanazawa, R; Hirakawa, A; Takamatsu, D; Tashiro, K; Matsui, Y; Hashine, K; Saito, R; Yokomizo, A; Yamamoto, Y; Narita, S; Hashimoto, K; Matsumoto, H; Akamatsu, S; Nishiyama, N; Eto, M; Kitamura, H; Tsuzuki, T. Validation study on the 2 mm diameter cutoff in lymph node-positive cases following radical prostatectomy in accordance with the AJCC/UICC TNM 8th edition: Real-world data analysis from a Japanese cohort INTERNATIONAL JOURNAL OF UROLOGY. 2024.06; 31 (6): 662-669. ( PubMed, DOI )

  9. Yatabe Y, Hanaoka M, Hanazawa R, Hirakawa A, Mukai T, Kimura K, Yamanoi K, Kono J, Yokota M, Takahashi H, Kobayashi A, Kobayashi K, Ichikawa N, Yasui M, Nakane K, Yamamoto M, Takenaka A, Nakamura Y, Takemasa I, Yabusaki N, Akamoto S, Tatarano S, Murata K, Manabe T, Fujimura T, Kawamura M, Egi H, Yamaguchi S, Terai Y, Inoue S, Ito A, Kinugasa Y. Robotic versus open and laparoscopic pelvic exenterations for pelvic cancer: a multicenter propensity-matched analysis in Japan. Surgical endoscopy. 2024.06; 38 (8): 4390-4401. ( PubMed, DOI )

  10. Arai, S; Hanaoka, M; Yamauchi, S; Baba, H; Hanazawa, R; Sato, H; Hirakawa, A; Tokunaga, M; Kinugasa, Y. Modified oral antibiotics and mechanical bowel preparation (OAMBP) versus conventional OAMBP for sigmoid colon and rectal surgery: A multicenter randomized non-inferiority trial ANNALS OF GASTROENTEROLOGICAL SURGERY. 2024.06; ( DOI )

  11. Yamada, T; Minami, T; Yoshino, S; Emoto, K; Mabuchi, S; Hanazawa, R; Hirakawa, A; Hashimoto, M. Relationship Between Diaphragm Thickness, Thickening Fraction, Dome Excursion, and Respiratory Pressures in Healthy Subjects: An Ultrasound Study LUNG. 2024.04; 202 (2): 171-178. ( PubMed, DOI )

  12. Kyohei Fujita, Yohei Sato, Ryoichi Hanazawa, Hirotaka Sagawa, Mariko Ishikawa, Shoko Fujii, Jiro Aoyama, Sakyo Hirai, Masataka Yoshimura, Yoshikazu Yoshino, Yoshihisa Kawano, Keigo Shigeta, Naoki Taira, Jun Karakama, Tadahiro Ishiwada, Motoshige Yamashina, Akihiko Hirakawa, Kazutaka Sumita. Impact of cancer history on long-term outcome after elective neuro-endovascular treatment in patients aged 80 years or older: A retrospective multicenter observational study. Geriatr Gerontol Int. 2024.02; 24 (2): 211-217. ( PubMed, DOI )

  13. Hirai S, Fujita K, Fujii S, Takahashi S, Shigeta K, Karakama J, Enomoto Y, Sato Y, Yoshimura M, Hirota S, Mizoue T, Yoshino Y, Kawano Y, Yamamura T, Kohyama S, Hirohata M, Yoshimura S, Ishii Y, Yamauchi T, Taira N, Obata Y, Sakamoto M, Inoue M, Yamashina M, Tokunaga S, Higashi T, Sawada K, Mochida H, Ido K, Takeuchi M, Takigawa T, Takagi Y, Morimoto M, Nanto M, Miki K, Misaki K, Arimura K, Hanaoka Y, Hara M, Hara S, Yokoyama K, Ooyama J, Hanazawa R, Sato H, Hirakawa A, Ishiguro M, Nemoto S, Sumita K. Study protocol of the ASTOP trial: A multicenter, randomized, double-blind, placebo-controlled trial of presurgical aspirin administration for the prevention of thromboembolic complications of coil embolization for ruptured aneurysms. PloS one. 2024; 19 (9): e0310906. ( PubMed, DOI )

  14. Shuheng Wen, Kana Unuma, Ryoichi Hanazawa, Shutaro Nagano, Ryo Watanabe, Akihiro Hirakawa, Koichi Uemura. Alcohol and toxicological factors influencing fatal falls from height in the Greater Tokyo Area: a retrospective study. Int J Legal Med. 2023.11; 138 (3): 793-800. ( PubMed, DOI )

  15. Yamada T, Minami T, Yoshino S, Emoto K, Mabuchi S, Hanazawa R, Hirakawa A, Hashimoto M. Diaphragm Ultrasonography: Reference Values and Influencing Factors for Thickness, Thickening Fraction, and Excursion in the Seated Position. Lung. 2023.11; 202 (1): 83-90. ( PubMed, DOI )

  16. Komatsuzaki K, Kageshima H, Sekino Y, Suzuki Y, Ugajin T, Tamaoka M, Hanazawa R, Hirakawa A, Miyazaki Y. Local nasal immunotherapy with birch pollen-galactomannan conjugate-containing ointment in mice and humans. Allergology international : official journal of the Japanese Society of Allergology. 2023.11; 73 (2): 290-301. ( PubMed, DOI )

  17. Hattori T, Ohara M, Yuasa T, Azuma R, Chen Q, Hanazawa R, Hirakawa A, Orimo S, Yokota T. Correlation of callosal angle at the splenium with gait and cognition in normal pressure hydrocephalus. Journal of neurosurgery. 2023.01; 139 (8): 1-11. ( PubMed, DOI )

  18. Hanazawa R, Sato H, Sasaki M, Suzuki K, Hirakawa A. Study designs and statistical analyses in randomized controlled trials of non-pharmacological preventive and therapeutic interventions for dementia continuum : A statistical review Dementia Japan. 2023.01; 37 (1): 96-132.

  19. Kawahara T, Iwamoto T, Takashima I, Hanazawa R, Uemura K, Uemura Y, Mukai H, Kikawa Y, Taira N. Association of change in health-related quality of life and treatment discontinuation in metastatic breast cancer: a post hoc, exploratory analysis of two randomized clinical trials Support Care Cancer. 2022.10; 30 (10): 8367-8375. ( PubMed, DOI )

  20. Oda G, Nakagawa T, Mori H, Onishi I, Fujioka T, Mori M, Kubota K, Hanazawa R, Hirakawa A, Ishikawa T, Okamoto K, Uetake H. Factors predicting upstaging from clinical N0 to pN2a/N3a in breast cancer patients. World Journal of Clinical Oncology. 2022.09; 13 (9): 748-757.

  21. Murata K, Takahashi Y, Inaba O, Nitta J, Kobori A, Sakamoto Y, Nagata Y, Tanimoto K, Matsuo S, Yamane T, Morita N, Satomi K, Sato H, Hanazawa R, Hirakawa A, Goya M, Sasano T. Efficacy of left atrial posterior wall isolation guided by lesion size prediction module for non-paroxysmal atrial fibrillation. EP Europace. 2022.07; 24 (11): 1769-1776. ( PubMed, DOI )

  22. Hirakawa A, Sato H, Hanazawa R, Suzuki K, Japanese Alzheimer's Disease Neuroimaging Initiative.. Estimating the longitudinal trajectory of cognitive function measurement using short-term data with different disease stages: Application in Alzheimer's disease. Statistics in medicine. 2022.06; 41 (21): 4200-4214.

  23. Takenaka K, Fujii T, Kawamoto A, Suzuki K, Shimizu H, Maeyashiki C, Yamaji O, Motobayashi M, Igarashi A, Hanazawa R, Hibiya S, Nagahori M, Saito E, Okamoto R, Ohtsuka K, Watanabe M. Deep neural network for video colonoscopy of ulcerative colitis: a cross-sectional study Lancet Gastroenterology & Hepatology. 2021.11; 7 (3): 230-237. ( PubMed, DOI )

  24. Takahashi Y, Nitta J, Kobori A, Sakamoto Y, Nagata Y, Tanimoto K, Matsuo S, Yamane T, Morita N, Satomi K, Inaba O, Murata K, Sasaki Y, Yoshimoto D, Kaneko M, Tanimoto Y, Isogai R, Yamashita S, Sato H, Hanazawa R, Hirakawa A, Goya M, Sasano T.. Alcohol Consumption Reduction and Clinical Outcomes of Catheter Ablation for Atrial Fibrillation Circulation:Arrhythmia and electrophysiology. 2021.06; 14 (6):

  25. Takahashi Y, Nitta J, Kobori A, Sakamoto Y, Nagata Y, Tanimoto K, Matsuo S, Yamane T, Morita N, Satomi K, Inaba O, Murata K, Sasaki Y, Yoshimoto D, Kaneko M, Tanimoto Y, Isogai R, Yamashita S, Sato H, Hanazawa R, Hirakawa A, Goya M, Sasano T. Alcohol Consumption Reduction and Clinical Outcomes of Catheter Ablation for Atrial Fibrillation. Circulation. Arrhythmia and electrophysiology. 2021.06; 14 (6): e009770. ( PubMed, DOI )

  26. Kato M, Hirakawa A, Sato H, Hanazawa R, Naito Y, Tochigi K, Sano T, Ishida S, Funahashi Y, Fujita T, Matsukawa Y, Hattori R, Tsuzuki T. Grade group 2 (10% >= GP4) patients have very similar malignant potential with grade group 1 patients, given the risk of intraductal carcinoma of the prostate Int J Clin Oncol. 2021.04; 26 (4): 764-769. ( PubMed, DOI )

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Conference Activities & Talks 【 display / non-display 】

  1. Hanazawa R, Sato H, Kitabayashi R, Hirakawa A.. Bayesian enrichment design for Alzheimer's disease clinical trials using historical trial data. ENAR 2025 Spring Meeting 2025.03.25 New Orleans, USA

  2. Tsuchiya K, Nagahori M, Hanazawa R, Sasaki S, Sato H, Hirakawa A, Anzai T, Takahashi K, Kobayashi Y, Hibiya S, Takenaka K, Watanabe M.. Serial daily recording of patient-reported outcomes (PRO2) might predict treatment change in the patients with ulcerative colitis. ECCO 2023 2023.03.01

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