Shiro Okamoto

6.3k total citations · 2 hit papers
17 papers, 4.9k citations indexed

About

Shiro Okamoto is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Gastroenterology. According to data from OpenAlex, Shiro Okamoto has authored 17 papers receiving a total of 4.9k indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Surgery, 11 papers in Pulmonary and Respiratory Medicine and 5 papers in Gastroenterology. Recurrent topics in Shiro Okamoto's work include Gastric Cancer Management and Outcomes (10 papers), Helicobacter pylori-related gastroenterology studies (10 papers) and Eosinophilic Esophagitis (5 papers). Shiro Okamoto is often cited by papers focused on Gastric Cancer Management and Outcomes (10 papers), Helicobacter pylori-related gastroenterology studies (10 papers) and Eosinophilic Esophagitis (5 papers). Shiro Okamoto collaborates with scholars based in Japan and United States. Shiro Okamoto's co-authors include Naomi Uemura, Soichiro Yamamoto, Naomi Sasaki, Shuji Yamaguchi, Kiyomi Taniyama, Nobutoshi Matsumura, Michio Yamakido, Ronald J. Schlemper, Shuichi Terao and Kenji Amagai and has published in prestigious journals such as New England Journal of Medicine, The Lancet and Gastroenterology.

In The Last Decade

Shiro Okamoto

17 papers receiving 4.8k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Helicobacter pylori Infection and the Development of Gastric Cancer

2001 3.5k citations Naomi Uemura, Shiro Okamoto et al. New England Journal of Medicine profile →
Effect of eradication of Helicobacter pylori on incidence of metachronous gastric carcinoma after endoscopic resection of early gastric cancer: an open-label, randomised controlled trial

2008 936 citations Kazutoshi Fukase, Mototsugu Kato et al. The Lancet profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Shiro Okamoto Japan	11	4.2k	2.5k	1.1k	876	641	17	4.9k
Naomi Sasaki Japan	14	3.2k 0.8×	1.9k 0.7×	759 0.7×	784 0.9×	746 1.2×	63	4.2k
Nobutoshi Matsumura Japan	15	3.2k 0.8×	1.7k 0.7×	725 0.7×	773 0.9×	924 1.4×	25	4.3k
Daniel P. Vandersteen United States	7	2.9k 0.7×	1.2k 0.5×	549 0.5×	1.0k 1.2×	439 0.7×	10	3.5k
Hala El‐Zimaity United States	31	2.7k 0.6×	1.1k 0.4×	836 0.8×	756 0.9×	282 0.4×	89	3.3k
Theodoros Rokkas Greece	18	2.4k 0.6×	1.0k 0.4×	1.1k 1.0×	247 0.3×	260 0.4×	29	2.9k
Pelayo Correa United States	10	2.0k 0.5×	908 0.4×	310 0.3×	594 0.7×	313 0.5×	11	2.4k
Kai‐Feng Pan China	31	2.0k 0.5×	1.2k 0.5×	283 0.3×	527 0.6×	1.3k 2.0×	105	3.8k
Jae J. Kim South Korea	23	1.5k 0.4×	1.5k 0.6×	818 0.8×	187 0.2×	377 0.6×	95	2.6k
Tamara Matysiak‐Budnik France	25	1.6k 0.4×	875 0.3×	917 0.8×	398 0.5×	431 0.7×	99	3.0k
Ruihua Shi China	33	1.7k 0.4×	1.2k 0.5×	447 0.4×	468 0.5×	1.2k 1.8×	160	3.8k

Countries citing papers authored by Shiro Okamoto

Since Specialization

Citations

This map shows the geographic impact of Shiro Okamoto'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 Shiro Okamoto with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Shiro Okamoto more than expected).

Fields of papers citing papers by Shiro Okamoto

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Shiro Okamoto. 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 Shiro Okamoto. The network helps show where Shiro Okamoto may publish in the future.

Co-authorship network of co-authors of Shiro Okamoto

This figure shows the co-authorship network connecting the top 25 collaborators of Shiro Okamoto. A scholar is included among the top collaborators of Shiro Okamoto 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 Shiro Okamoto. Shiro Okamoto is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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17 of 17 papers shown

Oka, Shiro, Shinji Tanaka, Shinji Nagata, et al.. (2022). Factors for conversion risk of colorectal endoscopic submucosal dissection: a multicenter study. Surgical Endoscopy. 36(8). 5698–5709. 18 indexed citations

Kuwai, Toshio, Shiro Oka, Yuzuru Tamaru, et al.. (2022). Efficacy and safety comparison of scissor-type knives with needle-type knives for colorectal endoscopic submucosal dissection: a post-hoc propensity score–matched analysis (with videos). Gastrointestinal Endoscopy. 96(1). 108–117. 8 indexed citations

Oka, Shiro, Shinji Tanaka, Shinji Nagata, et al.. (2019). Real-world learning curve analysis of colorectal endoscopic submucosal dissection: a large multicenter study. Surgical Endoscopy. 34(8). 3344–3351. 22 indexed citations

Okanobu, Hideharu, Masanori Ito, Shinji Tanaka, et al.. (2012). Evaluation of Individual Risk in Nonvariceal Gastrointestinal Bleeding Patients with NSAID Administration: A Multicenter Study in Japan. Digestion. 86(3). 187–193. 3 indexed citations

Fukase, Kazutoshi, Mototsugu Kato, Shogo Kikuchi, et al.. (2008). Effect of eradication of Helicobacter pylori on incidence of metachronous gastric carcinoma after endoscopic resection of early gastric cancer: an open-label, randomised controlled trial. The Lancet. 372(9636). 392–397. 936 indexed citations breakdown →

Hiraga, Yuko, et al.. (2008). Clinical Usefulness of NBI Magnification in Routine Colonoscopic Examination. Gastrointestinal Endoscopy. 67(5). AB136–AB136. 1 indexed citations

Uemura, Naomi, Shiro Okamoto, & Soichiro Yamamoto. (2002). H. pylori infection and the development of gastric cancer. The Keio Journal of Medicine. 51(supplement2). 63–68. 30 indexed citations

Uemura, Naomi, Shiro Okamoto, Soichiro Yamamoto, et al.. (2001). Helicobacter pylori Infection and the Development of Gastric Cancer. New England Journal of Medicine. 345(11). 784–789. 3523 indexed citations breakdown →

Haruma, Ken, Tomoari Kamada, Hiroyuki Kawaguchi, et al.. (2000). Effect of age and Helicobacter pylori infection on gastric acid secretion. Journal of Gastroenterology and Hepatology. 15(3). 277–283. 121 indexed citations

10.

Yamamoto, Soichiro, et al.. (2000). A New Rapid Test for Detecting Anti–Helicobacter pylori Antibody Excreted into Urine. Helicobacter. 5(3). 160–164. 30 indexed citations

11.

Uemura, Naomi & Shiro Okamoto. (2000). Effect of Helicobacter Pylori Eradication on Subsequent Development of Cancer after Endoscopic Resection of Early Gastric Cancer in Japan. Gastroenterology Clinics of North America. 29(4). 819–827. 70 indexed citations

12.

Uemura, Naomi, Shiro Okamoto, Hiroshi Masuda, et al.. (2000). Effects of Helicobacter pylori eradication on the background gastric mucosa in the patients after endoscopic mucosal resection of early gastric cancer. Gastroenterology. 118(4). A502–A502. 8 indexed citations

13.

Uemura, Naomi, Shiro Okamoto, Soichiro Yamamoto, et al.. (2000). Helicobacter pylori infection and the development of gastric cancer — Second report — Long term endoscopic follow up study. Gastroenterology. 118(4). A726–A726. 3 indexed citations

14.

Haruma, Ken, Shiro Okamoto, Hiroyuki Kawaguchi, et al.. (1997). Reduced Incidence of Helicobacter pylori Infection in Young Japanese Persons Between the 1970s and the 1990s. Journal of Clinical Gastroenterology. 25(4). 583–586. 49 indexed citations

15.

Tanaka, Shinji, Toshihiro Yokota, Daizo Saito, et al.. (1995). Clinicopathologic features of early rectal carcinoma and indications for endoscopic treatment. Diseases of the Colon & Rectum. 38(9). 959–963. 47 indexed citations

16.

Haruma, Ken, Hiroyuki Kawaguchi, Masaharu Yoshihara, et al.. (1994). Relationship Between Helicobacter pylori Infection and Gastric Acid Secretion in Young Healthy Subjects. Journal of Clinical Gastroenterology. 19(1). 20–22. 24 indexed citations

17.

Tanigawa, Yoshinori, et al.. (1981). Theophylline reduces poly(ADP-ribose) synthetase from chick embryo liver nuclei. Biochimica et Biophysica Acta (BBA) - General Subjects. 677(1). 63–68. 6 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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