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Masaaki Ito

National Cancer Center Hospital East

65H-index
1.1KPaper Count
1.8WCitation Count
Published Papers 251
Publication Date
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Anterior tumour location as a risk factor for local recurrence after laparoscopic surgery for stage I ultra-low rectal cancers: exploratory analysis of the Ultimate trial
errBJS Open
IF4.5
err2026-09-30
err0
errOAAI
errAtsushi Kohyama; Shinobu Ohnuma; Yuichiro Tsukada; Michiaki Unno; Jun Watanabe; Yosuke Fukunaga; Yasumitsu Hirano; Kazuhiro Sakamoto; Hiroki Hamamoto; Masanori Yoshimitsu; Hisanaga Horie; Nobuhisa Matsuhashi; Yoshiaki Kuriu; Shuntaro Nagai; Madoka Hamada; Shinichi Yoshioka; Tamuro Hayama; Koki Otsuka; Yusuke Inoue; Kazuki Ueda; Yuji Toiyama; Satoshi Maruyama; Shigeki Yamaguchi; Keitaro Tanaka; Motoko Suzuki; Toshihiro Misumi; Takeshi Naitoh; Masahiko Watanabe; Masaaki Ito; Ultimate Trial Group in the Japan Society of Laparoscopic Colorectal Surgery; null
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Prognostic Impact of Circumferential Resection Margin in Minimally Invasive Surgery for Locally Advanced Rectal Cancer: A Multicenter Prospective Study
errAnnals of Gastroenterological Surgery
IF3.3
err2026-09-10
err0
errOAAI
errAtsushi Hamabe; Masaaki Ito; Shigeo Toda; Yusuke Suwa; Suguru Hasegawa; Masanori Kotake; Masafumi Inomata; Kazuki Ueda; Atsushi Ogura; Kiichi Sugimoto; Kei Kimura; Koki Otsuka; Tatsuki Noguchi; Koya Hida; Yasumitsu Hirano; Kazushige Kawai; Shigeru Yamagishi; Takeshi Naitoh; Ichiro Takemasa; Japan Society of Laparoscopic Colorectal Surgery
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Artificial Intelligence–Based Surgical Phase Analysis Enables Objective Assessment of Surgeon Skill in Robotic Distal Gastrectomy: A Multicenter Study
errAnnals of Gastroenterological Surgery
IF3.3
err2026-09-08
err0
errOAAI
errMasaru Komatsu; Daichi Kitaguchi; Yoichi Ninomiya; Yuya Takabe; Mitsumasa Yoshida; Masahiro Yura; Nobuyoshi Takeshita; Takahiro Kinoshita; Masaaki Ito
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AI-based assessment of surgical efficiency and exposure quality in laparoscopic distal gastrectomy using a phase recognition model
errHernia
IF2.4
err2026-07-27
err0
PREAI
errAyumi Umemiya; Shin Takenaka; Daichi Kitaguchi; Shintaro Arakaki; Masashi Wakabayashi; Shuntaro Iuchi; Nao Baba; Risa Takai; Yoshitsugu Yanagida; Kimimasa Sasaki; Norihito Kosugi; Masahiro Yura; Nobuyoshi Takeshita; Takeo Fujita; Takahiro Kinoshita; Masaaki Ito
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ASO Visual Abstract: Tele-Expert Consultation for Locally Recurrent Rectal Cancer: A Prospective Multicenter Evaluation of the CONNECT-LR System
errAnnals of Surgical Oncology
IF3.5
err2026-07-19
err0
PREAI
errYuichiro Tsukada; Masataka Ikeda; Kay Uehara; Mitsugu Sekimoto; Fumihiko Fujita; Takeshi Suto; Masaaki Ito
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Tele-Expert Consultation for Locally Recurrent Rectal Cancer: A Prospective Multicenter Evaluation of the CONNECT-LR System
errAnnals of Surgical Oncology
IF3.5
err2026-06-27
err0
PREAI
errYuichiro Tsukada; Masataka Ikeda; Kay Uehara; Mitsugu Sekimoto; Fumihiko Fujita; Takeshi Suto; Masaaki Ito
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Machine learning-driven automated evaluation of surgical skills during laparoscopic distal gastrectomy based on blood pixel analysis
errSurgical Endoscopy
IF0
err2026-06-15
err0
PREAI
errShintaro Arakaki; Shin Takenaka; Daichi Kitaguchi; Tateo Ogane; Kimimasa Sasaki; Norihito Kosugi; Xue Zhao; Shuntaro Iuchi; Nao Baba; Yoshitsugu Yanagida; Risa Takai; Nobuyoshi Takeshita; Mitsuhisa Takatsuki; Masaaki Ito
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Optimal preoperative bowel preparation for intracorporeal anastomosis in laparoscopic colectomy
errSurgical Endoscopy
IF0
err2026-06-01
err0
PREAI
errShoma Sasaki; Daichi Kitaguchi; Masaaki Ito; Keitaro Tanaka; Tomohiro Yamaguchi; Jun Watanabe; Hiroki Hamamoto; Atsushi Nishimura; Fumihiko Fujita; Ryo Inada; Hiroki Takahashi; Masashi Miguchi; Hajime Kayano; Takeshi Naitoh; Ichiro Takemasa
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errSave
Hepatic-Differentiated Subpopulation in Clear Cell Renal Cell Carcinoma: A Multi-Omics Analysis of Tumors With Lymphovascular Invasion
errCancer Medicine
IF3.1
err2026-04-14
err0
errOAAI
errShugo Yajima; Yuichiro Tsukada; Riu Yamashita; Takao Fujisawa; Takeshi Kuwata; Reiko Watanabe; Genichiro Ishii; Nina Gabelia; Hartmut Juhl; Yoshikatsu Koga; Takayuki Yoshino; Masaaki Ito; Hitoshi Masuda
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Transgelin Expression in Activated Cancer-Associated Fibroblasts Regulates Stromal Contractility and Promotes Colon Cancer Progression
errCancer Medicine
IF3.1
err2026-04-08
err0
errOAAI
errRyuji Okamoto; Tetsuro Hiroi; Yuka Nakamura; Hiroko Hashimoto; Shingo Sakashita; Naoya Sakamoto; Shumpei Ishikawa; Horacio Cabral; Triantafyllos Stylianopoulos; Yuichiro Tsukada; Atsushi Ochiai; Tomonori Yano; Masaaki Ito; Genichiro Ishii; Motohiro Kojima
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On-demand GLUT3 expression augments CAR T cell metabolic fitness and antitumor efficacy in preclinical models of glioblastoma
errScience Translational Medicine
IF14.6
err2026-04-01
err0
PREAI
errYamaguchi, Junya; Watanabe, Keisuke; Nakamura, Akihiro; Lin, Nina Yi-Tzu; Maeda, Sachi; Sugiyama, Daisuke; Kato, Shinichiro; Nagata, Akihito; Nishinakamura, Hitomi; Itahashi, Kota; Koyama, Shohei; Mizoguchi, Hiroyuki; Shiraki, Yukihiro; Enomoto, Atsushi; Ohka, Fumiharu; Motomura, Kazuya; Tsukada, Yuichiro; Ito, Masaaki; Maeda, Yuka; Ueda, Ryuzo; Natsume, Atsushi; Saito, Ryuta; Nishikawa, Hiroyoshi
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Global benchmarks for minimally invasive right hemicolectomy for cancer
errBJS-BRITISH JOURNAL OF SURGERY
IF0
err2025-12-01
err0
PREAI
errAbbassi, Fariba; Ramser, Michaela; Pfister, Matthias; Staiger, Roxane D.; Kim, Sun J.; Park, Ji W.; van de Laar, Bart C. T.; Gonzalez, Marcos; Perano, Vittoria; Camilleri, Georgette; Merino, David; Dourado, Justin; Wignakumar, Anjelli; Shigeta, Kohei; Mansur Duarte de Miranda Marques, Tomas; Leonard, Daniel; Lee, Kai-Yin; Saklani, Avanish; Brown, Kilian G. M.; Butti, Fabio; Raguz, Ivana; Schena, Carlo Alberto; Kitaguchi, Daichi; Winter, Desmond C.; Ito, Masaaki; de'Angelis, Nicola; Hahnloser, Dieter; Vu, Jennifer; Desouza, Ashwin; Siew, Bei-En; Tan, Ker-Kan; Kartheuser, Alex; Aguiar Jr, Samuel; Okabayashi, Koji; Brown, Carl J.; Wexner, Steven; Biondo, Sebastiano; Miskovic, Danilo; Spinelli, Antonino; Vaccaro, Carlos A.; Consten, Esther C. J.; Min, Byung S.; Puhan, Milo A.; Turina, Matthias
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Response to Chemotherapy as a Key Factor in Time to Surgical Failure Following Conversion Hepatectomy for Initially Unresectable Colorectal Liver Metastases: A Retrospective Cohort Study
errEuropean Journal of Surgical Oncology
IF2.9
err2025-11-28
err0
PREAI
errNorikazu Une; Shin Kobayashi; Masashi Kudo; Motokazu Sugimoto; Akihito Kawazoe; Hideaki Bando; Yuichiro Tsukada; Masaaki Ito; Naoto Gotohda
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Clinicopathological features and prognosis of metastatic tumors in the small bowel: a large multicenter analysis of the JSCCR database in Japan
errJournal of Gastroenterology
IF5.5
err2025-11-18
err0
errOAAI
errAkiyoshi Tsuboi; Shiro Oka; Takeshi Yamada; Keigo Mitsui; Hironori Yamamoto; Keiichi Takahashi; Akio Shiomi; Kinichi Hotta; Yoji Takeuchi; Toshio Kuwai; Fumio Ishida; Shin-Ei Kudo; Shoichi Saito; Masashi Ueno; Eiji Sunami; Tomoki Yamano; Michio Itabashi; Kazuo Ohtsuka; Yusuke Kinugasa; Takayuki Matsumoto; Tamotsu Sugai; Toshio Uraoka; Koichi Kurahara; Shigeki Yamaguchi; Tomohiro Kato; Masazumi Okajima; Hiroshi Kashida; Fumihiko Fujita; Hiroaki Ikematsu; Masaaki Ito; Motohiro Esaki; Masaya Kawai; Takashi Yao; Madoka Hamada; Takahiro Horimatsu; Keiji Koda; Yasumori Fukai; Koji Komori; Yusuke Saitoh; Yukihide Kanemitsu; Hiroyuki Takamaru; Kazutaka Yamada; Hiroaki Nozawa; Tetsuji Takayama; Kazutomo Togashi; Eiji Shinto; Takehiro Torisu; Akira Toyoshima; Naoki Ohmiya; Takeshi Kato; Eigo Otsuji; Shinji Nagata; Yojiro Hashiguchi; Kenichi Sugihara; Yoichi Ajioka; Shinji Tanaka
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Risk of Peritoneal Recurrence Following Laparoscopic Versus Open Surgery for Stage II/III Colorectal Cancer: An Integrated Analysis of Three Phase III Randomized Controlled Trials (JCOG2310AS2)
errEuropean Journal of Surgical Oncology
IF2.9
err2025-10-26
err0
PREAI
errMarie Hanaoka; Kozo Kataoka; Junki Mizusawa; Akira Ouchi; Yasuhiro Shimada; Masafumi Inomata; Tetsuya Hamaguchi; Yasumasa Takii; Yuichi Takayama; Masaaki Ito; Shin Fujita; Yusuke Suwa; Masakazu Ikenaga; Hiroaki Souda; Chihiro Tanaka; Yusuke Sano; Shunsuke Tsukamoto; Atsuo Takashima; Yusuke Kinugasa; Yukihide Kanemitsu
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errSave
Quality of life after laparoscopic surgery for very low rectal cancer: A sub-analysis of the ultimate trial
errColorectal Disease
IF2.7
err2025-10-06
err0
errOAAI
errHiroki Hamamoto; Keitaro Tanaka; Yuichiro Tsukada; Jun Watanabe; Yosuke Fukunaga; Yasumitsu Hirano; Kazuhiro Sakamoto; Masanori Yoshimitsu; Hisanaga Horie; Nobuhisa Matsuhashi; Yoshiaki Kuriu; Shuntaro Nagai; Madoka Hamada; Shinichi Yoshioka; Shinobu Ohnuma; Tamuro Hayama; Koki Otsuka; Yusuke Inoue; Kazuki Ueda; Yuji Toiyama; Satoshi Maruyama; Shigeki Yamaguchi; Motoko Suzuki; Toshihiro Misumi; Takeshi Naitoh; Masahiko Watanabe; Masaaki Ito; Ultimate Trial Group in Japan Society of Laparoscopic Colorectal Surgery
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Construction of a Feedback Comment Analysis Model for Evaluation of Endoscopic Surgical Skill
errANNALS OF GASTROENTEROLOGICAL SURGERY
IF3.3
err2025-10-01
err0
errOAAI
errIwai, Shusaku; Takenaka, Shin; Kitaguchi, Daichi; Matsuzaki, Hiroki; Nakajima, Kei; Takabe, Yuya; Takeshita, Nobuyoshi; Ito, Masaaki
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Survival Outcomes of Patients with BRAF V600E-Mutant Resectable Extrahepatic Colorectal Oligometastases After Upfront Metastasectomy
errJOURNAL OF GASTROINTESTINAL CANCER
IF1.6
err2025-09-22
err0
PREAI
errMori, Takashi; Kobayashi, Shin; Tsukada, Yuichiro; Kojima, Motohiro; Kitaguchi, Daichi; Hasegawa, Hiro; Ikeda, Koji; Nishizawa, Yuji; Gotohda, Naoto; Bando, Hideaki; Tsuboi, Masahiro; Ito, Masaaki; Yoshino, Takayuki
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Delayed vs Immediate Coloanal Anastomosis after Total Mesorectal Excision for Low Rectal Cancer: An International Multicenter Retrospective Cohort Study
errJournal of the American College of Surgeons
IF3.4
err2025-08-14
err0
PREAI
errKitaguchi, Daichi MD, PhD; Seow-En, Isaac MBBS, FRCS; Shen, Ming-Yin MD, PhD; Ke, Tao-Wei MD; Kim, Ji-Seon MD; Kim, Jin MD, PhD; Ito, Masaaki MD, FACS, PhD; Chen, William Tzu-Liang MD; on behalf of the Asian Colorectal Cancer Collaborative
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Artificial Intelligence-Guided Total Mesorectal Excision: Development of a Deep Learning Model to Identify the Pelvic Fascial Plane Anatomy
errAnnals of Gastroenterological Surgery
IF3.3
err2025-07-09
err0
errOAAI
errYuta Suzuki; Daichi Kitaguchi; Norihito Kosugi; Hiro Hasegawa; Nobuyoshi Takeshita; Yusuke Kinugasa; Masaaki Ito
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Research Directions

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Co-authors
Cooperation Journals
I
Irving L. Weissman
H-index: 215 · Papers: 1.3K
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Shigeyuki Yokoyama
H-index: 118 · Papers: 2.0K
P
Pierre–Alain Clavien
H-index: 114 · Papers: 835
S
Shoichiro Tsugane
H-index: 110 · Papers: 1.4K
H
Hiroyasu Iso
H-index: 110 · Papers: 1.2K
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