Hiromasa Ohira

8.4k total citations
452 papers, 4.8k citations indexed

About

Hiromasa Ohira is a scholar working on Surgery, Epidemiology and Hepatology. According to data from OpenAlex, Hiromasa Ohira has authored 452 papers receiving a total of 4.8k indexed citations (citations by other indexed papers that have themselves been cited), including 170 papers in Surgery, 166 papers in Epidemiology and 158 papers in Hepatology. Recurrent topics in Hiromasa Ohira's work include Liver Disease Diagnosis and Treatment (120 papers), Liver Diseases and Immunity (114 papers) and Pancreatic and Hepatic Oncology Research (66 papers). Hiromasa Ohira is often cited by papers focused on Liver Disease Diagnosis and Treatment (120 papers), Liver Diseases and Immunity (114 papers) and Pancreatic and Hepatic Oncology Research (66 papers). Hiromasa Ohira collaborates with scholars based in Japan, United States and Italy. Hiromasa Ohira's co-authors include Atsushi Takahashi, Kazumichi Abe, Takuto Hikichi, Tadayuki Takagi, Manabu Hayashi, Atsushi Irisawa, Hiroshi Watanabe, Ken Okai, Katsutoshi Obara and Reiji Kasukawa and has published in prestigious journals such as SHILAP Revista de lepidopterología, The Journal of Immunology and Gastroenterology.

In The Last Decade

Hiromasa Ohira

415 papers receiving 4.7k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hiromasa Ohira Japan 34 1.9k 1.8k 1.5k 931 816 452 4.8k
Konstantinos N. Lazaridis United States 34 2.1k 1.1× 2.8k 1.6× 2.4k 1.5× 1.1k 1.2× 1.1k 1.3× 124 5.4k
Pier Maria Battezzati Italy 39 2.0k 1.0× 2.2k 1.2× 1.4k 0.9× 699 0.8× 913 1.1× 98 4.4k
Jean P. Molleston United States 37 2.0k 1.1× 1.3k 0.7× 1.9k 1.2× 316 0.3× 581 0.7× 146 4.5k
Piotr Milkiewicz Poland 35 1.8k 0.9× 1.9k 1.1× 1.5k 1.0× 750 0.8× 505 0.6× 210 3.9k
Christian Datz Austria 43 3.1k 1.6× 2.0k 1.1× 597 0.4× 544 0.6× 335 0.4× 176 6.3k
Massimo Zuin Italy 39 2.3k 1.2× 2.5k 1.4× 1.2k 0.8× 735 0.8× 369 0.5× 142 4.2k
Fernando Rotellar Spain 43 1.7k 0.9× 1.5k 0.8× 2.2k 1.4× 1.1k 1.2× 638 0.8× 195 5.9k
Joan Torrás Spain 38 1.1k 0.6× 813 0.5× 1.5k 1.0× 455 0.5× 446 0.5× 214 5.2k
Christopher L. Bowlus United States 53 4.0k 2.1× 4.9k 2.7× 3.2k 2.1× 1.2k 1.3× 1.1k 1.3× 231 8.9k
Heinz Zoller Austria 44 1.2k 0.7× 1.0k 0.6× 620 0.4× 485 0.5× 419 0.5× 188 5.9k

Countries citing papers authored by Hiromasa Ohira

Since Specialization
Citations

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

Fields of papers citing papers by Hiromasa Ohira

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiromasa Ohira

This figure shows the co-authorship network connecting the top 25 collaborators of Hiromasa Ohira. A scholar is included among the top collaborators of Hiromasa Ohira 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 Hiromasa Ohira. Hiromasa Ohira 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.
Inoue, Jun, Kazumichi Abe, Hiroaki Haga, et al.. (2025). Validation Study of Scores Predicting Hepatocellular Carcinoma Risk in Chronic Hepatitis B Patients Treated With Nucleos(t)ide Analogues. Journal of Viral Hepatitis. 32(4). e70021–e70021.
2.
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Sugimoto, Mitsuru, Tadayuki Takagi, Tomohiro Suzuki, et al.. (2025). A new preprocedural predictive risk model for post-endoscopic retrograde cholangiopancreatography pancreatitis: The SuPER model. eLife. 13. 1 indexed citations
4.
Takeuchi, Akihito, Masanori Abe, Sachiko Furukawa, et al.. (2025). Validation of PBC‐10 in Japanese patients with primary biliary cholangitis. Hepatology Research. 55(7). 986–993.
5.
Sugimoto, Mitsuru, Tadayuki Takagi, Rei Suzuki, et al.. (2025). Selection methods for endoscopic ultrasound‑guided biliary drainage cases that are appropriate for beginners. Experimental and Therapeutic Medicine. 29(3). 53–53. 1 indexed citations
6.
Takahashi, Atsushi, Hiromasa Ohira, Kazumichi Abe, et al.. (2024). Autoimmune Hepatitis with Metabolic Dysfunction-associated Fatty Liver Disease. Internal Medicine. 64(3). 337–342. 1 indexed citations
7.
Hikichi, Takuto, Jun Nakamura, Minami Hashimoto, et al.. (2024). Visibility of esophageal squamous cell carcinoma under iodine staining on texture and color enhancement imaging. SHILAP Revista de lepidopterología. 5(1). e370–e370. 1 indexed citations
8.
Takahashi, Atsushi, Fumikazu Hayashi, Tetsuya Ohira, et al.. (2024). Impact of Changes in Lifestyle and Psychological Factors on the Incidence of Metabolic Syndrome after the Great East Japan Earthquake: Follow-up of the Fukushima Health Management Survey. Journal of Atherosclerosis and Thrombosis. 32(3). 345–355. 1 indexed citations
9.
Sugimoto, Mitsuru, Tadayuki Takagi, Rei Suzuki, et al.. (2023). Comparison of time to recurrent biliary obstruction between plastic stents and metallic stents for endoscopic ultrasound‑guided biliary drainage. Experimental and Therapeutic Medicine. 25(5). 214–214. 3 indexed citations
10.
Sugimoto, Mitsuru, Tadayuki Takagi, Rei Suzuki, et al.. (2023). Factors Associated With Difficult Endoscopic Ultrasonography-guided Biliary Drainage. Journal of Clinical Gastroenterology. 58(5). 494–501. 1 indexed citations
11.
Fujita, Masashi, Kazumichi Abe, Hidekatsu Kuroda, et al.. (2022). Influence of skeletal muscle volume loss during lenvatinib treatment on prognosis in unresectable hepatocellular carcinoma: a multicenter study in Tohoku, Japan. Scientific Reports. 12(1). 6479–6479. 10 indexed citations
12.
Hikichi, Takuto, Jun Nakamura, Mika Takasumi, et al.. (2021). Usefulness of Endoscopic Ultrasound with the Jelly-Filling Method for Esophageal Varices. Diagnostics. 11(9). 1726–1726. 4 indexed citations
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Sugimoto, Mitsuru, Tadayuki Takagi, Rei Suzuki, et al.. (2021). Spontaneous disappearance of common bile duct stones following the insertion of a new dumbbell‐shaped, covered self‐expandable metallic stent in a patient with benign biliary stricture. SHILAP Revista de lepidopterología. 9(5). e04093–e04093. 2 indexed citations
15.
Onizawa, Michio, Shun‐ichiro Asahara, Yoshiaki Kido, et al.. (2021). Oral administration of d-serine prevents the onset and progression of colitis in mice. Journal of Gastroenterology. 56(8). 732–745. 18 indexed citations
16.
Takasumi, Mika, Takuto Hikichi, Minami Hashimoto, et al.. (2021). Usefulness of a Fork-Tip Needle in Endoscopic Ultrasound-Guided Fine-Needle Biopsy for Gastric Subepithelial Lesions. Diagnostics. 11(10). 1883–1883. 6 indexed citations
17.
Sugimoto, Mitsuru, Hiroki Irie, Mika Takasumi, et al.. (2021). A simple method for diagnosing gallbladder malignant tumors with subserosa invasion by endoscopic ultrasonography. BMC Cancer. 21(1). 288–288. 3 indexed citations
18.
Konno, Naoki, Mika Takasumi, Makoto Takano, et al.. (2013). A Case of Helicobacter, Pylori-negative Differentiatedtype Gastric Carcinoma with a Gastric Mucin Phenotype Treated by ESD. Acta gastro-enterologica belgica. 55(9). 2 indexed citations
19.
Irisawa, Atsushi, Ai Sato, Masaki Satō, et al.. (2009). EARLY DIAGNOSIS OF SMALL PANCREATIC CANCER: ROLE OF ENDOSCOPIC ULTRASONOGRAPHY. Digestive Endoscopy. 21(s1). S92–6. 10 indexed citations
20.
Obara, Katsutoshi, et al.. (1989). ENDOSCOPIC INJECTION SCLEROTHERAPY WITH α-CYANOACRYLATE MONOMER FOR EMERGENT BLEEDING FROM ISOLATED GASTRIC VARICES -REPORT OF 3 CASES-. Acta gastro-enterologica belgica. 31(12). 3 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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