Hiroki Ohkuma

3.9k total citations
147 papers, 2.9k citations indexed

About

Hiroki Ohkuma is a scholar working on Neurology, Pulmonary and Respiratory Medicine and Epidemiology. According to data from OpenAlex, Hiroki Ohkuma has authored 147 papers receiving a total of 2.9k indexed citations (citations by other indexed papers that have themselves been cited), including 109 papers in Neurology, 32 papers in Pulmonary and Respiratory Medicine and 23 papers in Epidemiology. Recurrent topics in Hiroki Ohkuma's work include Intracranial Aneurysms: Treatment and Complications (73 papers), Traumatic Brain Injury and Neurovascular Disturbances (53 papers) and Neurosurgical Procedures and Complications (32 papers). Hiroki Ohkuma is often cited by papers focused on Intracranial Aneurysms: Treatment and Complications (73 papers), Traumatic Brain Injury and Neurovascular Disturbances (53 papers) and Neurosurgical Procedures and Complications (32 papers). Hiroki Ohkuma collaborates with scholars based in Japan, Canada and United States. Hiroki Ohkuma's co-authors include Shigeharu Suzuki, Norihito Shimamura, Masato Naraoka, Takahiro Nakano, H. Manabe, Kazumi Ogane, Kenichiro Asano, Naoya Matsuda, Satsuki Suzuki and E Sobata and has published in prestigious journals such as Circulation, SHILAP Revista de lepidopterología and Stroke.

In The Last Decade

Hiroki Ohkuma

141 papers receiving 2.8k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hiroki Ohkuma Japan 31 2.2k 582 429 266 262 147 2.9k
Marc L. Otten United States 29 1.0k 0.5× 236 0.4× 372 0.9× 194 0.7× 407 1.6× 61 2.1k
Yuhei Yoshimoto Japan 29 1.6k 0.7× 1.0k 1.8× 732 1.7× 223 0.8× 867 3.3× 148 3.4k
Tomio Sasaki Japan 28 1.2k 0.6× 410 0.7× 689 1.6× 289 1.1× 343 1.3× 110 2.6k
Shigeru Nishizawa Japan 31 1.7k 0.8× 373 0.6× 518 1.2× 366 1.4× 751 2.9× 174 3.6k
Alexander L. Coon United States 36 3.0k 1.4× 1.3k 2.2× 515 1.2× 539 2.0× 149 0.6× 145 3.7k
Michelle L. Mauermann United States 27 1.4k 0.7× 296 0.5× 295 0.7× 426 1.6× 740 2.8× 114 2.8k
Christopher J. Stapleton United States 28 1.5k 0.7× 755 1.3× 749 1.7× 223 0.8× 185 0.7× 136 2.6k
Yasuhiko Kaku Japan 19 776 0.4× 458 0.8× 415 1.0× 148 0.6× 139 0.5× 80 1.5k
A. Pasqualin Italy 28 2.7k 1.2× 321 0.6× 469 1.1× 379 1.4× 94 0.4× 89 3.0k
Cordell E. Gross United States 29 1.3k 0.6× 535 0.9× 517 1.2× 309 1.2× 410 1.6× 79 2.6k

Countries citing papers authored by Hiroki Ohkuma

Since Specialization
Citations

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

Fields of papers citing papers by Hiroki Ohkuma

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroki Ohkuma

This figure shows the co-authorship network connecting the top 25 collaborators of Hiroki Ohkuma. A scholar is included among the top collaborators of Hiroki Ohkuma 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 Hiroki Ohkuma. Hiroki Ohkuma 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.
Fukuda, Hitoshi, Kei Kawada, Takatoshi Sorimachi, et al.. (2025). Risk factors of short-term poor functional outcomes and long-term durability of ruptured large or giant intracranial aneurysms. Journal of neurosurgery. 142(6). 1776–1785. 2 indexed citations
2.
Naraoka, Masato, Norihito Shimamura, & Hiroki Ohkuma. (2024). Cilostazol Alleviates Delayed Cerebral Ischemia After Subarachnoid Hemorrhage by Attenuating Microcirculatory Dysfunction. Translational Stroke Research. 16(4). 1285–1292. 1 indexed citations
3.
Shimamura, Norihito, Hiroki Ohkuma, Ichiro NAKAHARA, et al.. (2022). Analysis of Factors Influencing Delayed Presentation in Japanese Patients with Subarachnoid Hemorrhage. World Neurosurgery. 171. e590–e595. 1 indexed citations
4.
Naraoka, Masato, Naoya Matsuda, Norihito Shimamura, & Hiroki Ohkuma. (2021). Role of microcirculatory impairment in delayed cerebral ischemia and outcome after aneurysmal subarachnoid hemorrhage. Journal of Cerebral Blood Flow & Metabolism. 42(1). 186–196. 13 indexed citations
5.
Naraoka, Masato, et al.. (2019). The Role of Intracranial Pressure and Subarachnoid Blood Clots in Early Brain Injury After Experimental Subarachnoid Hemorrhage in Rats. World Neurosurgery. 129. e63–e72. 8 indexed citations
6.
Fumoto, Toshio, et al.. (2019). The Role of Oxidative Stress in Microvascular Disturbances after Experimental Subarachnoid Hemorrhage. Translational Stroke Research. 10(6). 684–694. 69 indexed citations
7.
Wang, Liang, Toshio Fumoto, Saeko Masumoto, et al.. (2017). Regression of atherosclerosis with apple procyanidins by activating the ATP-binding cassette subfamily A member 1 in a rabbit model. Atherosclerosis. 258. 56–64. 21 indexed citations
8.
Naraoka, Masato, et al.. (2016). Role of Cyclooxygenase-2 in Relation to Nitric Oxide and Endothelin-1 on Pathogenesis of Cerebral Vasospasm After Subarachnoid Hemorrhage in Rabbit. Translational Stroke Research. 7(3). 220–227. 25 indexed citations
9.
10.
Naraoka, Masato, Naoya Matsuda, Norihito Shimamura, Kenichiro Asano, & Hiroki Ohkuma. (2014). The Role of Arterioles and the Microcirculation in the Development of Vasospasm after Aneurysmal SAH. BioMed Research International. 2014. 1–9. 36 indexed citations
11.
12.
Shimamura, Norihito & Hiroki Ohkuma. (2013). Phenotypic Transformation of Smooth Muscle in Vasospasm after Aneurysmal Subarachnoid Hemorrhage. Translational Stroke Research. 5(3). 357–364. 39 indexed citations
13.
Asano, Kenichiro, et al.. (2012). A rare case of primary bone xanthoma of the clivus. Brain Tumor Pathology. 29(2). 123–128. 5 indexed citations
14.
Ohkuma, Hiroki, et al.. (2011). Aesthetic Consideration in Surgery for Unruptured Cerebral Aneurysms. Surgery for Cerebral Stroke. 39(2). 75–83.
15.
Taniguchi, Satoshi, Ikuo Fukuda, Kazuyuki Daitoku, et al.. (2009). Prevalence of venous thromboembolism in neurosurgical patients. Heart and Vessels. 24(6). 425–428. 21 indexed citations
16.
Ohkuma, Hiroki, et al.. (2003). Dissecting aneurysms of the middle cerebral artery: neuroradiological and clinical features. Neuroradiology. 45(3). 143–148. 44 indexed citations
17.
Ohkuma, Hiroki, Masahiko Tanaka, & Shigeharu Suzuki. (2000). Incidence and risk factors of aneurysmal subarachnoid hemorrhage.. Nosotchu. 22(4). 617–622.
18.
Ohkuma, Hiroki, et al.. (2000). Role of 123 I-IMP SPET in the early diagnosis of borderline chronic hydrocephalus after aneurysmal subarachnoid haemorrhage. European Journal of Nuclear Medicine and Molecular Imaging. 27(5). 559–565. 2 indexed citations
19.
Ohkuma, Hiroki, et al.. (1995). Incidence of aneurysmal subarachnoid hemorrhage in the Shimokita area of Aomori Prefecture.. Nosotchu. 17(5). 466–472.
20.
Ohkuma, Hiroki. (1988). Role of platelet funciton in symptomatic cerebral vasospasm.. Nosotchu. 10(4). 355–363. 1 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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