Shiro Oka

9.0k total citations · 1 hit paper
269 papers, 6.2k citations indexed

About

Shiro Oka is a scholar working on Pulmonary and Respiratory Medicine, Surgery and Gastroenterology. According to data from OpenAlex, Shiro Oka has authored 269 papers receiving a total of 6.2k indexed citations (citations by other indexed papers that have themselves been cited), including 141 papers in Pulmonary and Respiratory Medicine, 130 papers in Surgery and 91 papers in Gastroenterology. Recurrent topics in Shiro Oka's work include Gastric Cancer Management and Outcomes (117 papers), Gastrointestinal Tumor Research and Treatment (52 papers) and Gastrointestinal Bleeding Diagnosis and Treatment (47 papers). Shiro Oka is often cited by papers focused on Gastric Cancer Management and Outcomes (117 papers), Gastrointestinal Tumor Research and Treatment (52 papers) and Gastrointestinal Bleeding Diagnosis and Treatment (47 papers). Shiro Oka collaborates with scholars based in Japan, United States and Vietnam. Shiro Oka's co-authors include Shinji Tanaka, Kazuaki Chayama, Masaharu Yoshihara, Shigeto Yoshida, Mayuko Hirata, Iwao Kaneko, Yoji Sanomura, Hiroyuki Kanao, Ritsuo Mouri and Koji Arihiro and has published in prestigious journals such as SHILAP Revista de lepidopterología, Gastroenterology and PLoS ONE.

In The Last Decade

Shiro Oka

244 papers receiving 6.0k 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.

Advantage of endoscopic submucosal dissection compared with EMR for early gastric cancer

2006 551 citations Shiro Oka, Shinji Tanaka et al. Gastrointestinal Endoscopy profile →

Peers

Shiro Oka

PRM

SURGE

GASTR

ONCOL

PFM

Gwang Ha Kim South Korea

Toshio Uraoka Japan

Hyoung‐Il Kim South Korea

James Lau Hong Kong

Irving Waxman United States

Krish Ragunath United Kingdom

Shigeaki Yoshida Japan

Charles J. Lightdale United States

Yasumasa Niwa Japan

Yasushi Sano Japan

Gwang Ha Kim South Korea

Shiro Oka

3.1k ×0.8

PRM

3.4k ×1.1

SURGE

1.9k ×0.8

GASTR

1.2k ×0.6

ONCOL

348 ×0.6

PFM

Citations per year, relative to Shiro Oka Shiro Oka (= 1×) peers Gwang Ha Kim

Countries citing papers authored by Shiro Oka

Since Specialization

Citations

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

Fields of papers citing papers by Shiro Oka

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Shiro Oka

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

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Fujino, Hatsue, Masataka Tsuge, Yasutoshi Fujii, et al.. (2025). Usefulness of serum HBV RNA levels for predicting antiviral response to entecavir treatment in patients with chronic hepatitis B. Journal of Gastroenterology. 60(4). 469–478.

Ono, Atsushi, C. Nelson Hayes, Ryoichi Miura, et al.. (2025). Multiomics Analysis of Liver Molecular Dysregulation Leading to Nonviral-Related Hepatocellular Carcinoma Development. Journal of Proteome Research. 24(3). 1102–1117.

Takigawa, Hidehiko, Daisuke Shimizu, Akiyoshi Tsuboi, et al.. (2025). Endoscopic features differentiating non‐Helicobacter pylori Helicobacter‐induced gastric mucosa‐associated lymphoid tissue lymphoma with a nodular gastritis‐like appearance and H. pylori‐induced conventional nodular gastritis. Digestive Endoscopy. 37(9). 998–1009.

Uchida, Takuro, Masataka Tsuge, Nobuhiko Hiraga, et al.. (2024). Interferon alpha induces a stronger antiviral effect than interferon lambda in HBV/HDV infected humanized mice. Virus Research. 349. 199451–199451.

Ishikawa, Akira, Hidenori Tanaka, Ken Yamashita, et al.. (2024). Colonic invasive adenocarcinoma with squamoid morules: A case report. SHILAP Revista de lepidopterología. 4(1). e330–e330.

Yamashita, Ken, Shinji Nagata, Toshio Kuwai, et al.. (2024). Vertical margin distance in T1 colorectal carcinoma resected by endoscopic submucosal dissection affects prognosis after additional surgery. International Journal of Colorectal Disease. 39(1). 134–134.

Kotachi, Takahiro, Toshio Kuwai, Akiyoshi Tsuboi, et al.. (2024). Clinicopathologic Features of Early Gastric Cancer after Helicobacter pylori Eradication in Japanese Patients: Comparative Study between Early (<10 Years) and Late (>10 Years) Onset. Cancers. 16(18). 3154–3154. 1 indexed citations

Quach, Duc Trong, Shunsuke Miyauchi, Mai Luu, et al.. (2024). Prevalence and associated factors of chronic constipation among Japanese university students. Frontiers in Public Health. 12. 1258020–1258020. 4 indexed citations

Uchikawa, Shinsuke, Tomokazu Kawaoka, Ryoichi Miura, et al.. (2024). Significance of changes in tumor markers in patients treated with durvalumab plus tremelimumab combination therapy as a surrogate marker for tumor response to unresectable hepatocellular carcinoma. Hepatology Research. 55(1). 149–154. 3 indexed citations

10.

Bao, Hongmei, Masataka Tsuge, Takuro Uchida, et al.. (2024). Alteration of Gene Expression After Entecavir and Pegylated Interferon Therapy in HBV-Infected Chimeric Mouse Liver. Viruses. 16(11). 1743–1743. 1 indexed citations

11.

Tsuboi, Akiyoshi, et al.. (2024). Clinical usefulness and acceptability of small‐bowel capsule endoscopy with panoramic imaging compared with axial imaging in Japanese patients. SHILAP Revista de lepidopterología. 5(1). e389–e389.

12.

Fujii, Yasutoshi, Atsushi Ono, C. Nelson Hayes, et al.. (2024). Peripheral T Cell Subpopulations as a Potential Surrogate Biomarker during Atezolizumab plus Bevacizumab Treatment for Hepatocellular Carcinoma. Cancers. 16(7). 1328–1328. 3 indexed citations

13.

Tsuboi, Akiyoshi, et al.. (2023). Gel immersion EMR of small-bowel inflammatory fibroid polyp using double-balloon endoscopy. VideoGIE. 9(2). 92–94. 5 indexed citations

14.

Tsuboi, Akiyoshi, Hidenori Tanaka, Ken Yamashita, et al.. (2023). Long‐term outcomes of patients with obscure gastrointestinal bleeding after negative capsule endoscopy. Journal of Gastroenterology and Hepatology. 39(1). 165–171. 3 indexed citations

15.

Oka, Shiro, Takahiro Kotachi, Hidenori Tanaka, et al.. (2023). Indications for Dental Floss Clip Traction During Gastric Endoscopic Submucosal Dissection by Less-Experienced Endoscopists. Journal of the Korean Gastric Cancer Association. 23(4). 512–512.

16.

Uchida, Takuro, Michio Imamura, C. Nelson Hayes, et al.. (2023). HBV with precore and basal core promoter mutations exhibits a high replication phenotype and causes ER stress-mediated cell death in humanized liver chimeric mice. Hepatology. 78(3). 929–942. 7 indexed citations

17.

Yamamoto, Hironori, Tomonori Yano, Akihiro Araki, et al.. (2022). Guidelines for endoscopic balloon dilation in treating Crohn's disease‐associated small intestinal strictures (supplement to the Clinical Practice Guidelines for Enteroscopy). Digestive Endoscopy. 34(7). 1278–1296. 23 indexed citations

18.

Nakamura, Koki, Yuji Urabe, Ryo Yuge, et al.. (2020). Genomic Characterization of Non-Invasive Differentiated-Type Gastric Cancer in the Japanese Population. Cancers. 12(2). 510–510. 8 indexed citations

19.

Saito, Hiroaki, Tomonori Aoki, Kazuharu Aoyama, et al.. (2020). Automatic detection and classification of protruding lesions in wireless capsule endoscopy images based on a deep convolutional neural network. Gastrointestinal Endoscopy. 92(1). 144–151.e1. 131 indexed citations

20.

Aoki, Tomonori, Atsuo Yamada, Kazuharu Aoyama, et al.. (2019). Clinical usefulness of a deep learning‐based system as the first screening on small‐bowel capsule endoscopy reading. Digestive Endoscopy. 32(4). 585–591. 82 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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