Koki Otsuka

1.8k total citations
101 papers, 1.3k citations indexed

About

Koki Otsuka is a scholar working on Surgery, Oncology and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Koki Otsuka has authored 101 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 62 papers in Surgery, 45 papers in Oncology and 26 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Koki Otsuka's work include Colorectal Cancer Surgical Treatments (20 papers), Gastric Cancer Management and Outcomes (17 papers) and Genetic factors in colorectal cancer (17 papers). Koki Otsuka is often cited by papers focused on Colorectal Cancer Surgical Treatments (20 papers), Gastric Cancer Management and Outcomes (17 papers) and Genetic factors in colorectal cancer (17 papers). Koki Otsuka collaborates with scholars based in Japan and United States. Koki Otsuka's co-authors include Akira Sasaki, Go Wakabayashi, Hiroyuki Nitta, Takeshi Takahara, Satoshi Nishizuka, Tamotsu Sugai, Keisuke Koeda, Wataru Habano, Akira Umemura and Toru Obuchi and has published in prestigious journals such as Journal of Clinical Oncology, SHILAP Revista de lepidopterología and PLoS ONE.

In The Last Decade

Koki Otsuka

89 papers receiving 1.3k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Koki Otsuka Japan 19 728 485 325 285 173 101 1.3k
Hiroaki Terajima Japan 21 932 1.3× 284 0.6× 304 0.9× 687 2.4× 91 0.5× 84 1.4k
Hendrik A. Marsman Netherlands 19 541 0.7× 464 1.0× 217 0.7× 465 1.6× 150 0.9× 36 1.3k
Gaoquan Gong China 12 286 0.4× 310 0.6× 224 0.7× 234 0.8× 107 0.6× 20 962
Ioannis D. Kostakis Greece 19 553 0.8× 398 0.8× 296 0.9× 375 1.3× 39 0.2× 85 1.3k
Yasunari Sakamoto Japan 16 358 0.5× 527 1.1× 238 0.7× 114 0.4× 118 0.7× 73 1.1k
Francesco Di Fabio Italy 21 694 1.0× 635 1.3× 345 1.1× 281 1.0× 89 0.5× 63 1.1k
Ismaïl Labgaa Switzerland 20 528 0.7× 443 0.9× 283 0.9× 387 1.4× 94 0.5× 74 1.2k
Seiji Kawazoe Japan 17 289 0.4× 276 0.6× 488 1.5× 682 2.4× 248 1.4× 33 1.4k
Maria Vellone Italy 24 870 1.2× 689 1.4× 417 1.3× 855 3.0× 83 0.5× 67 1.5k
Koichiro Haruki Japan 23 717 1.0× 1.1k 2.3× 352 1.1× 294 1.0× 83 0.5× 202 1.9k

Countries citing papers authored by Koki Otsuka

Since Specialization
Citations

This map shows the geographic impact of Koki Otsuka's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Koki Otsuka with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Koki Otsuka more than expected).

Fields of papers citing papers by Koki Otsuka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Koki Otsuka. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Koki Otsuka. The network helps show where Koki Otsuka may publish in the future.

Co-authorship network of co-authors of Koki Otsuka

This figure shows the co-authorship network connecting the top 25 collaborators of Koki Otsuka. A scholar is included among the top collaborators of Koki Otsuka based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Koki Otsuka. Koki Otsuka is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Matsuoka, Hiroshi, Eiji Sugihara, Makoto Sumitomo, et al.. (2025). Mutation Analysis of TMB‐High Colorectal Cancer: Insights Into Molecular Pathways and Clinical Implications. Cancer Science. 116(4). 1082–1093.
2.
Kobayashi, Yosuke, Kenichi Nakamura, Takeshi Takahara, et al.. (2025). Safe implementation of laparoscopic transabdominal preperitoneal repair for groin hernias by surgical residents in Japan: a single-center retrospective study. Surgical Endoscopy. 39(7). 4411–4423.
3.
Matsuoka, Hiroshi, Tomohiro Mizuno, Takeshi Takahara, et al.. (2024). Risk factors for residual liver recurrence of colorectal cancer after resection of liver metastases and significance of adjuvant chemotherapy. Asian Journal of Surgery. 47(12). 5124–5130.
4.
Otsuka, Koki, Junichiro Hiro, Hiroko Taniguchi, et al.. (2024). Impact of the new robotic platform hinotori™ in preventing subcutaneous emphysema after colorectal cancer surgery. Surgical Endoscopy. 39(1). 229–236. 6 indexed citations
5.
Iwaya, Takeshi, Noriyuki Sasaki, Masashi Fujita, et al.. (2021). Frequent post-operative monitoring of colorectal cancer using individualised ctDNA validated by multiregional molecular profiling. British Journal of Cancer. 124(9). 1556–1565. 7 indexed citations
6.
Otsuka, Koki, et al.. (2021). Realizing the Wishes of Terminal Patients: Caregiving Transport Efforts for End of Life in the Kuji Area of Japan. SHILAP Revista de lepidopterología. 2(1). 40–47. 1 indexed citations
7.
Otsuka, Koki, Toshimoto Kimura, Hitoshi Fujii, et al.. (2019). Early renal dysfunction after temporary ileostomy construction. Surgery Today. 50(7). 703–710. 12 indexed citations
8.
Akiyama, Yuji, Takeshi Iwaya, Fumitaka Endo, et al.. (2018). Evaluation of the need for routine feeding jejunostomy for enteral nutrition after esophagectomy. Journal of Thoracic Disease. 10(12). 6854–6862. 23 indexed citations
9.
Otsuka, Koki, Fumitaka Endo, Toshimoto Kimura, et al.. (2017). Intraoperative fluorescence-imaging of nerves - a contribution to navigation surgery. Imaging in Medicine. 9(5). 143–148. 1 indexed citations
10.
Otsuka, Koki, Toshimoto Kimura, Kei Sato, et al.. (2017). [A Case of More Than Five-Year Survival of Carcinoma Associated with Anal Fistula Effectively Treated by Combined Modality Therapy].. PubMed. 44(12). 1754–1756. 1 indexed citations
11.
Akiyama, Yuji, Takeshi Iwaya, Fumitaka Endo, et al.. (2017). Stability of cervical esophagogastrostomy via hand-sewn anastomosis after esophagectomy for esophageal cancer. Diseases of the Esophagus. 30(5). 1–7. 12 indexed citations
12.
13.
Kato, Kenichi, et al.. (2016). Clinical evaluation of18F-fludeoxyglucose positron emission tomography/CT using point spread function reconstruction for nodal staging of colorectal cancer. British Journal of Radiology. 89(1063). 20150938–20150938. 7 indexed citations
14.
Akiyama, Yuji, Takeshi Iwaya, Fumitaka Endo, et al.. (2015). Successfully treated advanced esophageal cancer with left axillary lymph node metastasis and synchronous right breast cancer: a case report. Surgical Case Reports. 1(1). 94–94. 3 indexed citations
15.
Ito, Naoko, Takeshi Iwaya, Kenichiro Ikeda, et al.. (2014). Hyperglycemia 3 Days After Esophageal Cancer Surgery Is Associated with an Increased Risk of Postoperative Infection. Journal of Gastrointestinal Surgery. 18(9). 1547–1556. 21 indexed citations
16.
Kato, Kuniyuki, et al.. (2012). A Case of Rectal GIST Treated with Imatinib Mesylate Neoadjuvant Therapy to Preserve the Anus and Curative Resection. Nihon Daicho Komonbyo Gakkai Zasshi. 65(4). 239–244. 1 indexed citations
17.
Otsuka, Koki, et al.. (2011). A CASE OF TRANSMESOCOLONIC HERNIA IN THE MESENTERY OF THE TRANSVERSE COLON. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 72(6). 1589–1594.
18.
Mizuno, Masaru, Jun Nakajima, Satoshi Nishizuka, et al.. (2011). Laparoscopy-assisted appendectomy through an umbilical port in children. Asian Journal of Endoscopic Surgery. 4(1). 11–15. 1 indexed citations
19.
Hasegawa, Tadashi, Koki Otsuka, Toshimoto Kimura, et al.. (2010). Primary retroperitoneal spindle cell liposarcoma: Pathological and immunohistochemical findings. Pathology International. 60(6). 472–476. 4 indexed citations
20.
Sugai, Tamotsu, Wataru Habano, Yufei Jiao, et al.. (2006). Analysis of Molecular Alterations in Left- and Right-Sided Colorectal Carcinomas Reveals Distinct Pathways of Carcinogenesis. Journal of Molecular Diagnostics. 8(2). 193–201. 111 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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