Published Papers & Misc - Hirai Takashi

1. Atsuyuki Kawabata, Keisuke Hide, Takayuki Motoyoshi, Jun Hashimoto, Yu Matsukura, Takuya Oyaizu, Takashi Hirai, Hiroaki Onuma, Satoru Egawa, Kentaro Yamada, Shingo Morishita, Kazuo Kusano, Kazuyuki Otani, Shigeo Shindo, Toshitaka Yoshii. Management and Risk Factors of Fracture-Type Proximal Junctional Kyphosis: Focus on Myelopathy and Intervention. Global Spine J. 2026.03; 16 (2): 895-903. ( PubMed, DOI )

2. Kazuya Tsukamoto, Koji Fujita, Fumiyuki Nihey, Tomoyuki Kuroiwa, Takuya Ibara, Akiko Yamamoto, Eriku Yamada, Tomohiko Waki, Toru Sasaki, Takashi Hirai, Akimoto Nimura, Hiroshi Kajitani, Chenhui Huang, Kentaro Nakahara, Toshitaka Yoshii. Cervical myelopathy screening using in-shoe inertial measurement unit sensors and machine learning focusing on gait disturbance. Eur Spine J. 2026.02; ( PubMed, DOI )

3. Narihito Nagoshi, Satoru Egawa, Kenichiro Sakai, Kazuo Kusano, Shunji Tsutsui, Takashi Hirai, Yu Matsukura, Kanichiro Wada, Keiichi Katsumi, Masao Koda, Atsushi Kimura, Takeo Furuya, Satoshi Maki, Norihiro Nishida, Yukitaka Nagamoto, Yasushi Oshima, Kei Ando, Hiroaki Nakashima, Tsutomu Endo, Kanji Mori, Hideaki Nakajima, Kazuma Murata, Masayuki Miyagi, Takashi Kaito, Kei Yamada, Tomohiro Banno, Satoshi Kato, Tetsuro Ohba, Masahiko Takahata, Hiroshi Moridaira, Shunsuke Fujibayashi, Hiroyuki Katoh, Haruo Kanno, Kota Watanabe, Hiroshi Taneichi, Shiro Imagama, Yoshiharu Kawaguchi, Katsushi Takeshita, Masaya Nakamura, Morio Matsumoto, Masashi Yamazaki, Toshitaka Yoshii. Does Advanced Age Negatively Impact Treatment Outcomes of Cervical Ossification of the Posterior Longitudinal Ligament? A Prospective Multicenter Study. Spine (Phila Pa 1976). 2026.02; 51 (4): 294-301. ( PubMed, DOI )

4. Akinobu Suzuki, Koji Tamai, Shinji Takahashi, Masayoshi Iwamae, Hiroshi Taniwaki, Yuki Shiratani, Takaki Shimizu, Kenichiro Kakutani, Yutaro Kanda, Hiroyuki Tominaga, Ichiro Kawamura, Masayuki Ishihara, Masaaki Paku, Yohei Takahashi, Toru Funayama, Kousei Miura, Eiki Shirasawa, Hirokazu Inoue, Atsushi Kimura, Takuya Iimura, Hiroshi Moridaira, Hideaki Nakajima, Shuji Watanabe, Koji Akeda, Norihiko Takegami, Kazuo Nakanishi, Hirokatsu Sawada, Koji Matsumoto, Masahiro Funaba, Hidenori Suzuki, Haruki Funao, Tsutomu Oshigiri, Takashi Hirai, Bungo Otsuki, Kazu Kobayakawa, Koji Uotani, Hiroaki Manabe, Shinji Tanishima, Ko Hashimoto, Chizuo Iwai, Daisuke Yamabe, Akihiko Hiyama, Shoji Seki, Yuta Goto, Masashi Miyazaki, Kazuyuki Watanabe, Toshio Nakamae, Takashi Kaito, Hiroaki Nakashima, Narihito Nagoshi, Satoshi Kato, Shiro Imagama, Kota Watanabe, Gen Inoue, Takeo Furuya, . Changes in performance status and predictive factors for poor improvement following surgery for spinal metastasis: a nationwide multicenter prospective cohort study. Spine J. 2026.02; 26 (2): 386-399. ( PubMed, DOI )

5. Ichiro Kawamura, Hiroyuki Tominaga, Hirofumi Shimada, Hiromi Sasaki, Noboru Taniguchi, Yuki Shiratani, Akinobu Suzuki, Hidetomi Terai, Takaki Shimizu, Kenichiro Kakutani, Yutaro Kanda, Masayuki Ishihara, Masaaki Paku, Yohei Takahashi, Toru Funayama, Kousei Miura, Eiki Shirasawa, Hirokazu Inoue, Atsushi Kimura, Takuya Iimura, Hiroshi Moridaira, Hideaki Nakajima, Shuji Watanabe, Koji Akeda, Norihiko Takegami, Kazuo Nakanishi, Hirokatsu Sawada, Koji Matsumoto, Masahiro Funaba, Hidenori Suzuki, Haruki Funao, Tsutomu Oshigiri, Takashi Hirai, Bungo Otsuki, Kazu Kobayakawa, Koji Uotani, Hiroaki Manabe, Shinji Tanishima, Ko Hashimoto, Chizuo Iwai, Daisuke Yamabe, Akihiko Hiyama, Shoji Seki, Yuta Goto, Masashi Miyazaki, Kazuyuki Watanabe, Toshio Nakamae, Takashi Kaito, Hiroaki Nakashima, Narihito Nagoshi, Satoshi Kato, Shiro Imagama, Kota Watanabe, Gen Inoue, Takeo Furuya. Clinical Outcomes of Patients Who Underwent Palliative Surgery for Spinal Metastases With and Without a History of Radiation: A Multicenter Registry Study. Global Spine J. 2026.02; 21925682261426935. ( PubMed, DOI )

6. Yusuke Setojima, Kengo Fujii, Toru Funayama, Toshitaka Yoshii, Satoru Egawa, Takashi Hirai, Hiroshi Takahashi, Masashi Yamazaki, Masao Koda, . Predictive factors for bladder function recovery following cervical OPLL surgery: a comprehensive analysis. Spine J. 2026.01; 26 (1): 119-125. ( PubMed, DOI )

7. Yuri Miyakoshi, Takuya Takahashi, Jun Hashimoto, Satoru Egawa, Shingo Morishita, Yu Matsukura, Kentaro Yamada, Takashi Hirai, Tetsuya Jinno, Toshitaka Yoshii, Hiroyuki Inose. Impact of Vitamin D on Surgical Outcomes for Lumbar Spinal Canal Stenosis. Int J Spine Surg. 2026.01; ( PubMed, DOI )

8. Sadayuki Ito, Hiroaki Nakashima, Naoki Segi, Jun Ouchida, Yuki Shiratani, Akinobu Suzuki, Hidetomi Terai, Takaki Shimizu, Kenichiro Kakutani, Yutaro Kanda, Hiroyuki Tominaga, Ichiro Kawamura, Masayuki Ishihara, Masaaki Paku, Yohei Takahashi, Toru Funayama, Kousei Miura, Eiki Shirasawa, Hirokazu Inoue, Atsushi Kimura, Takuya Iimura, Hiroshi Moridaira, Hideaki Nakajima, Shuji Watanabe, Koji Akeda, Norihiko Takegami, Kazuo Nakanishi, Hirokatsu Sawada, Koji Matsumoto, Masahiro Funaba, Hidenori Suzuki, Haruki Funao, Tsutomu Oshigiri, Takashi Hirai, Bungo Otsuki, Kazu Kobayakawa, Koji Uotani, Hiroaki Manabe, Shinji Tanishima, Ko Hashimoto, Chizuo Iwai, Daisuke Yamabe, Akihiko Hiyama, Shoji Seki, Yuta Goto, Masashi Miyazaki, Kazuyuki Watanabe, Toshio Nakamae, Takashi Kaito, Narihito Nagoshi, Satoshi Kato, Kota Watanabe, Shiro Imagama, Gen Inoue, Takeo Furuya, . Machine Learning-Based Prognostic Scoring for Spinal Metastases: A JASA Multicenter Prospective Study Integrating Modern Oncologic Advances. Spine (Phila Pa 1976). 2026.01; ( PubMed, DOI )

9. Masahiro Iinuma, Takeo Furuya, Yuki Shiratani, Akinobu Suzuki, Hidetomi Terai, Takaki Shimizu, Kenichiro Kakutani, Yutaro Kanda, Hiroyuki Tominaga, Ichiro Kawamura, Masayuki Ishihara, Masaaki Paku, Yohei Takahashi, Toru Funayama, Kosei Miura, Eiki Shirasawa, Hirokazu Inoue, Atsushi Kimura, Takuya Iimura, Hiroshi Moridaira, Hideaki Nakajima, Shuji Watanabe, Koji Akeda, Norihiko Takagami, Kazuo Nakanishi, Hirokatsu Sawada, Koji Matsumoto, Masahiro Funaba, Hidenori Suzuki, Haruki Funao, Tsutomu Oshigiri, Takashi Hirai, Bungo Otsuki, Kazu Kobayakawa, Koji Uotani, Hiroaki Manabe, Shinji Tanishima, Ko Hashimoto, Chizuo Iwai, Daisuke Yamabe, Akihiko Hiyama, Shoji Seki, Yuta Goto, Masashi Miyazaki, Kazuyuki Watanabe, Toshio Nakamae, Takashi Kaito, Hiroaki Nakashima, Narihito Nagoshi, Satoshi Kato, Shiro Imagama, Kota Watanabe, Gen Inoue, Seiji Ohtori, Hisateru Niki. Prognostic scoring systems reflect the prognosis of patients with metastatic spinal tumors who underwent spinal surgery in recent cases: JASA multicenter prospective study. J Orthop Sci. 2026.01; ( PubMed, DOI )

10. Takuya Takahashi, Hiroyuki Sato, Yohei Takahashi, Kota Watanabe, Tomohiro Banno, Kyohei Sakaki, Yoshiyasu Arai, Yuichi Takano, Yawara Eguchi, Yuki Taniguchi, Satoshi Maki, Yasuchika Aoki, Toshitaka Yoshii, Hiroshi Yamada, Takashi Kaito, Yutaka Hiraizumi, Masatune Yamagata, Masaya Nakamura, Naobumi Hosogane, Akihiro Hirakawa, Seiji Ohtori, Takashi Hirai. Cost-effectiveness of intradiscal injection with condoliase versus microendoscopic discectomy for lumbar disc herniation: a retrospective multicenter study. Sci Rep. 2025.12; 15 (1): 43913. ( PubMed, DOI )

11. Hiroaki Onuma, Takashi Hirai, Kenichiro Sakai, Motonori Hashimoto, Hiroyuki Inose, Kentaro Yamada, Yu Matsukura, Shingo Morishita, Satoru Egawa, Jun Hashimoto, Kentaro Sakaeda, Satoshi Tamura, Ichiro Torigoe, Masaki Tomori, Kyohei Sakaki, Kazuyuki Otani, Kazuo Kusano, Tsuyoshi Yamada, Shuta Ushio, Shigeo Shindo, Yoshiyasu Arai, Toshitaka Yoshii. Onset timing and recovery patterns in segmental motor paralysis following anterior cervical spine surgery: a multicenter study of the risk factors for persistent paralysis. Spine J. 2025.12; ( PubMed, DOI )

12. Yusuke Murakami, Yu Yamato, Kei Watanabe, Keiichi Nakai, Keiji Nagata, Masashi Miyazaki, Rei Goto, Yu Matsukura, Kazuhiro Hasegawa, Masanari Takami, Takashi Hirai, Masayuki Ohashi, Kota Watanabe, Shinji Takahashi, Takashi Ohnishi, Shiro Imagama, Gen Inoue, Naohisa Miyakoshi, Takashi Kobayashi, Kanji Mori, Hiroyuki Tomita, Takahito Fujimori, Hiroshi Yamada, Hiroshi Hashizume, Takashi Kaito, Toshitaka Yoshii. Investigation of hospitalization costs for spinal corrective surgery in adult spinal deformity: A multicenter prospective study in Japan. J Orthop Sci. 2025.12; ( PubMed, DOI )

13. Kota Watanabe, Yohei Takahashi, Takehiro Michikawa, Takuya Takahashi, Tomohiro Banno, Kyohei Sakaki, Yoshiyasu Arai, Yuichi Takano, Yawara Eguchi, Yuki Taniguchi, Satoshi Maki, Yasuchika Aoki, Shunichi Fujii, Kentaro Sakaeda, Yu Matsukura, Tsutomu Akazawa, Akihito Minamide, Hidetoshi Nojiri, Kenichiro Sakai, Satoshi Kato, Koji Tamai, Hidekazu Suzuki, Masayuki Miyagi, Toshitaka Yoshii, Hiroshi Yamada, Takashi Kaito, Yutaka Hiraizumi, Masatsune Yamagata, Masaya Nakamura, Naobumi Hosogane, Seiji Ohtori, Takashi Hirai. Disc Level-Specific outcomes of intradiscal condoliase injection for lumbar disc herniation: A multicenter retrospective study. J Orthop Sci. 2025.12; ( PubMed, DOI )

14. Satoshi Maki, Takuya Takahashi, Shunichi Fujii, Kentaro Sakaeda, Yohei Takahashi, Kota Watanabe, Tomohiro Banno, Kyohei Sakaki, Yoshiyasu Arai, Yuichi Takano, Yawara Eguchi, Yuki Taniguchi, Yasuchika Aoki, Hiroshi Yamada, Takashi Kaito, Yutaka Hiraizumi, Masatsune Yamagata, Masaya Nakamura, Hirotaka Haro, Seiji Ohtori, Takashi Hirai. Predictive factors for outcomes of chemonucleolysis with condoliase in lumbar disc herniation: A multi-institutional study. J Orthop Sci. 2025.12; ( PubMed, DOI )

15. Takuya Takahashi, Kanji Mori, Shigeto Kobayashi, Hisashi Inoue, Kurisu Tada, Naoto Tamura, Takashi Hirai, Yu Matsukura, Satoru Egawa, Satoshi Tamura, Narihito Nagoshi, Satoshi Maki, Keiichi Katsumi, Masao Koda, Kazuma Murata, Kazuhiro Takeuchi, Hiroaki Nakashima, Shiro Imagama, Yoshiharu Kawaguchi, Toshitaka Yoshii. Comparison of Anterior Spinal Bridging and Sagittal Spinal Parameters in Diffuse Idiopathic Skeletal Hyperostosis and Axial Spondylitis: A Multicenter Study. Spine Surg Relat Res. 2025.11; 9 (6): 647-657. ( PubMed, DOI )

16. Kanji Mori, Masayuki Miyagi, Shinsuke Ikeda, Yuji Yokozeki, Kenichiro Sakai, Tsutomu Endo, Masahiko Takahata, Shunji Tsutsui, Satoshi Kato, Satoru Egawa, Takashi Hirai, Satoshi Maki, Takashi Hozumi, Norihiro Nishida, Hiroaki Nakashima, Hideaki Nakajima, Hiroshi Takahashi, Masao Koda, Kazuo Kusano, Shiro Imagama, Toshitaka Yoshii, Yoshiharu Kawaguchi, Masashi Yamazaki. Postoperative residual neuropathic pain prevents return to work after cervical OPLL surgery: nationwide multicenter study. Sci Rep. 2025.11; 15 (1): 42724. ( PubMed, DOI )

17. Masafumi Kawai, Satoshi Kato, Noriaki Yokogawa, Takaki Shimizu, Satoru Demura, Yuki Shiratani, Akinobu Suzuki, Koji Tamai, Kenichiro Kakutani, Yutaro Kanda, Hiroyuki Tominaga, Ichiro Kawamura, Masayuki Ishihara, Masaaki Paku, Toru Funayama, Kousei Miura, Eiki Shirasawa, Hirokazu Inoue, Atsushi Kimura, Kazuo Nakanishi, Hirokatsu Sawada, Koji Matsumoto, Masahiro Funaba, Hidenori Suzuki, Koji Akeda, Norihiko Takegami, Takuya Iimura, Hiroshi Moridaira, Hideaki Nakajima, Tsutomu Oshigiri, Takashi Hirai, Bungo Otsuki, Kazu Kobayakawa, Haruki Funao, Koji Uotani, Shinji Tanishima, Koichi Sairyo, Ko Hashimoto, Chizuo Iwai, Shoji Seki, Masashi Miyazaki, Kazuyuki Watanabe, Toshio Nakamae, Takashi Kaito, Hiroaki Nakashima, Narihito Nagoshi, Shiro Imagama, Kota Watanabe, Gen Inoue, Takeo Furuya, . Effect of Preoperative Nutritional Status on Postoperative Clinical Outcomes of Patients With Metastatic Spinal Tumors: Japan Association of Spine Surgeons With Ambition Multicenter Study. Spine (Phila Pa 1976). 2025.11; 50 (22): 1571-1580. ( PubMed, DOI )

18. Naoki Segi, Hiroaki Nakashima, Shiro Imagama, Satoru Egawa, Kenichiro Sakai, Kazuo Kusano, Shunji Tsutsui, Takashi Hirai, Yu Matsukura, Kanichiro Wada, Keiichi Katsumi, Masao Koda, Atsushi Kimura, Takeo Furuya, Satoshi Maki, Narihito Nagoshi, Norihiro Nishida, Yukitaka Nagamoto, Yasushi Oshima, Sadayuki Ito, Tsutomu Endo, Kanji Mori, Hideaki Nakajima, Kazuma Murata, Masayuki Miyagi, Takashi Kaito, Kei Yamada, Tomohiro Banno, Satoshi Kato, Tetsuro Ohba, Masahiko Takahata, Hiroshi Moridaira, Bungo Otsuki, Hiroyuki Katoh, Haruo Kanno, Hiroshi Taneichi, Yoshiharu Kawaguchi, Katsushi Takeshita, Masaya Nakamura, Masashi Yamazaki, Toshitaka Yoshii. Impact of postoperative C5 palsy on quality of life in patients with cervical ossification of the posterior longitudinal ligament: a prospective study. J Neurosurg Spine. 2025.11; 44 (2): 253-261. ( PubMed, DOI )

19. Takashi Hirai, Yu Matsukura, Satoru Egawa, Hiroaki Onuma, Toshitaka Yoshii. Complications of anterior and posterior surgery for degenerative cervical myelopathy. J Clin Orthop Trauma. 2025.10; 69 103159. ( PubMed, DOI )

20. Kyota Kitagawa, Satoshi Maki, Yuki Shiratani, Akinobu Suzuki, Koji Tamai, Takaki Shimizu, Kenichiro Kakutani, Yutaro Kanda, Hiroyuki Tominaga, Ichiro Kawamura, Masayuki Ishihara, Masaaki Paku, Yohei Takahashi, Toru Funayama, Kousei Miura, Eiki Shirasawa, Hirokazu Inoue, Atsushi Kimura, Takuya Iimura, Hiroshi Moridaira, Hideaki Nakajima, Shuji Watanabe, Koji Akeda, Norihiko Takegami, Kazuo Nakanishi, Hirokatsu Sawada, Koji Matsumoto, Masahiro Funaba, Hidenori Suzuki, Haruki Funao, Tsutomu Oshigiri, Takashi Hirai, Bungo Otsuki, Kazu Kobayakawa, Koji Uotani, Koichi Sairyo, Shinji Tanishima, Ko Hashimoto, Chizuo Iwai, Daisuke Yamabe, Akihiko Hiyama, Shoji Seki, Kenji Kato, Masashi Miyazaki, Kazuyuki Watanabe, Toshio Nakamae, Takashi Kaito, Hiroaki Nakashima, Narihito Nagoshi, Satoshi Kato, Shiro Imagama, Kota Watanabe, Seiji Ohtori, Gen Inoue, Takeo Furuya. Machine Learning-Based Prediction of Quality of Life Improvement After Surgery for Spinal Metastases: A Prospective Multicenter Study. Spine (Phila Pa 1976). 2025.10; 50 (20): 1410-1419. ( PubMed, DOI )