Koichi Hirata

37.1k total citations · 1 hit paper
920 papers, 19.7k citations indexed

About

Koichi Hirata is a scholar working on Surgery, Neurology and Epidemiology. According to data from OpenAlex, Koichi Hirata has authored 920 papers receiving a total of 19.7k indexed citations (citations by other indexed papers that have themselves been cited), including 246 papers in Surgery, 246 papers in Neurology and 177 papers in Epidemiology. Recurrent topics in Koichi Hirata's work include Peripheral Neuropathies and Disorders (97 papers), Parkinson's Disease Mechanisms and Treatments (91 papers) and Hereditary Neurological Disorders (81 papers). Koichi Hirata is often cited by papers focused on Peripheral Neuropathies and Disorders (97 papers), Parkinson's Disease Mechanisms and Treatments (91 papers) and Hereditary Neurological Disorders (81 papers). Koichi Hirata collaborates with scholars based in Japan, United States and Singapore. Koichi Hirata's co-authors include Nobuhiro Yuki, Michiaki Koga, Keisuke Suzuki, Masayuki Miyamoto, Masaaki Odaka, Tomoyuki Miyamoto, Keiichiro Susuki, Yasutoshi Kimura, Toru Mizuguchi and Satoshi Kuwabara and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Nature Genetics and Journal of Clinical Oncology.

In The Last Decade

Koichi Hirata

863 papers receiving 19.3k citations

Hit Papers

Assessing interactions in the brain with exact low-resolu... 2011 2026 2016 2021 2011 200 400 600
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.

  1. Assessing interactions in the brain with exact low-resolution electromagnetic tomography
    2011 609 citations Koichi Hirata et al. profile →

Peers

Koichi Hirata
Peter Vajkoczy Germany
Matthias Endres Germany
Nobuo Hashimoto Japan
Mei Lü United States
Jerome B. Posner United States
Orlando Guntinas‐Lichius Germany
Catriona McLean Australia
Edward R. Laws United States
Bruno Dallapiccola Italy
Gary A. Rosenberg United States
Peter Vajkoczy Germany
Koichi Hirata
Citations per year, relative to Koichi Hirata Koichi Hirata (= 1×) peers Peter Vajkoczy

Countries citing papers authored by Koichi Hirata

Since Specialization
Citations

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

Fields of papers citing papers by Koichi Hirata

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Koichi Hirata

This figure shows the co-authorship network connecting the top 25 collaborators of Koichi Hirata. A scholar is included among the top collaborators of Koichi Hirata 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 Koichi Hirata. Koichi Hirata 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.
Suzuki, Keisuke, Shiho Suzuki, Yasuo Haruyama, Hiroaki Fujita, & Koichi Hirata. (2024). Clinical impact of restless legs syndrome in patients with migraine: a 12-year, single-center, longitudinal study. Sleep and Biological Rhythms. 23(1). 21–27. 1 indexed citations
2.
Ueno, Yuji, Yohei Tateishi, Ryosuke Doijiri, et al.. (2024). Atherogenic Dyslipidemia Is Critically Related to Aortic Complicated Lesions in Cryptogenic Stroke. Journal of Atherosclerosis and Thrombosis. 32(7). 804–822.
3.
Igarashi, Hisaka, Mika Komori, Kaname Ueda, et al.. (2024). Underrecognition of migraine‐related stigmatizing attitudes and social burden: Results of the OVERCOME Japan study. Brain and Behavior. 14(7). e3547–e3547. 8 indexed citations
4.
Suzuki, Shiho, Keisuke Suzuki, Tomohiko Shiina, Yasuo Haruyama, & Koichi Hirata. (2023). Real-world experience with monthly and quarterly dosing of fremanezumab for the treatment of patients with migraine in Japan. Frontiers in Neurology. 14. 1220285–1220285. 15 indexed citations
5.
6.
Ueno, Yuji, Yohei Tateishi, Takahiro Shimizu, et al.. (2023). High-risk patent foramen ovale and elderly in cryptogenic stroke. Journal of Stroke and Cerebrovascular Diseases. 32(11). 107344–107344. 4 indexed citations
7.
Iijima, Mutsumi, Yasuyuki Okuma, Keisuke Suzuki, et al.. (2021). Associations between probable REM sleep behavior disorder, olfactory disturbance, and clinical symptoms in Parkinson’s disease: A multicenter cross-sectional study. PLoS ONE. 16(2). e0247443–e0247443. 12 indexed citations
8.
Hirata, Koichi, Kaname Ueda, Mika Komori, et al.. (2021). Comprehensive population-based survey of migraine in Japan: results of the ObserVational Survey of the Epidemiology, tReatment, and Care Of MigrainE (OVERCOME [Japan]) study. Current Medical Research and Opinion. 37(11). 1945–1955. 46 indexed citations
9.
Tateishi, Yohei, Yuji Ueno, Akira Tsujino, et al.. (2021). Cardiac and Echocardiographic Markers in Cryptogenic Stroke with Incidental Patent Foramen Ovale. Journal of Stroke and Cerebrovascular Diseases. 30(8). 105892–105892. 2 indexed citations
10.
Yamaguchi, Hiroshi, Yasutoshi Kimura, Masafumi Imamura, et al.. (2020). <p>Effect of Rikkunshito, a Traditional Japanese Herbal Medicine, on Delayed Gastric Emptying and Oral Dietary Intake After Pancreaticoduodenectomy: A Prospective, Randomized, Single-Center, Open-Labeled Study</p>. Clinical and Experimental Gastroenterology. Volume 13. 577–587. 3 indexed citations
11.
Tsukui, Daisuke, Hiroaki Fujita, Keisuke Suzuki, & Koichi Hirata. (2020). A case report of cryptococcal meningitis associated with ruxolitinib. Medicine. 99(13). e19587–e19587. 7 indexed citations
12.
13.
Igarashi, Shinichi, Hiromu Suzuki, Takeshi Niinuma, et al.. (2010). A Novel Correlation between LINE-1 Hypomethylation and the Malignancy of Gastrointestinal Stromal Tumors. Clinical Cancer Research. 16(21). 5114–5123. 75 indexed citations
14.
Ueki, Tomomi, Jae‐Hyun Park, Toshihiko Nishidate, et al.. (2009). Ubiquitination and Downregulation of BRCA1 by Ubiquitin-Conjugating Enzyme E2T Overexpression in Human Breast Cancer Cells. Cancer Research. 69(22). 8752–8760. 106 indexed citations
15.
Suzuki, Hiromu, M Toyota, Edward Gabrielson, et al.. (2008). Frequent epigenetic inactivation of Wnt antagonist genes in breast cancer. British Journal of Cancer. 98(6). 1147–1156. 203 indexed citations
16.
Nishikawa, Noriko, Minoru Toyota, Hiromu Suzuki, et al.. (2007). Gene Amplification and Overexpression of PRDM14 in Breast Cancers. Cancer Research. 67(20). 9649–9657. 90 indexed citations
17.
Hirota, Masahiko, Tadahiro Takada, Yoshifumi Kawarada, et al.. (2006). JPN Guidelines for the management of acute pancreatitis: severity assessment of acute pancreatitis. Journal of Hepato-Biliary-Pancreatic Surgery. 13(1). 33–41. 64 indexed citations
18.
Yamamoto, Masaaki, Toshihiko Torigoe, Kenjiro Kamiguchi, et al.. (2005). A Novel Isoform of TUCAN Is Overexpressed in Human Cancer Tissues and Suppresses Both Caspase-8– and Caspase-9–Mediated Apoptosis. Cancer Research. 65(19). 8706–8714. 26 indexed citations
19.
Koga, Michiaki, Masaki Takahashi, Midori Masuda, Koichi Hirata, & Nobuhiro Yuki. (2005). Campylobacter gene polymorphism as a determinant of clinical features of Guillain–Barre syndrome. Neurology. 65(9). 1376–1381. 81 indexed citations
20.
Hanzawa, Kazuhiko, et al.. (2004). . 17(2). 76–78.

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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