Jun-ichi Koyama

1.4k total citations
87 papers, 1.1k citations indexed

About

Jun-ichi Koyama is a scholar working on Pulmonary and Respiratory Medicine, Neurology and Surgery. According to data from OpenAlex, Jun-ichi Koyama has authored 87 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 34 papers in Pulmonary and Respiratory Medicine, 33 papers in Neurology and 18 papers in Surgery. Recurrent topics in Jun-ichi Koyama's work include Intracranial Aneurysms: Treatment and Complications (23 papers), Vascular Procedures and Complications (15 papers) and Cerebrovascular and Carotid Artery Diseases (15 papers). Jun-ichi Koyama is often cited by papers focused on Intracranial Aneurysms: Treatment and Complications (23 papers), Vascular Procedures and Complications (15 papers) and Cerebrovascular and Carotid Artery Diseases (15 papers). Jun-ichi Koyama collaborates with scholars based in Japan, Egypt and United States. Jun-ichi Koyama's co-authors include Takafumi Hayashi, Kazuhiro Hongo, Jusuke Ito, Shigeaki Kobayashi, Tetsuya Goto, Tetsuyoshi Horiuchi, Kazuhiro Yamada, Yukinari Kakizawa, Hideyoshi Nishiyama and Toshihiro Ogiwara and has published in prestigious journals such as SHILAP Revista de lepidopterología, Journal of neurosurgery and Virology.

In The Last Decade

Jun-ichi Koyama

83 papers receiving 1.0k citations

Peers

Jun-ichi Koyama
André Luiz Ferreira Costa Brazil
Anders Westermark Sweden
Tohru Kurabayashi Japan
Kurt P. Schellhas United States
Christopher A. Roberts United States
Kazunori Yoshiura Japan
Peter D. Waite United States
Ken-ichi Michi Japan
Nicole M. Grosland United States
Philip Worthington United States
André Luiz Ferreira Costa Brazil
Jun-ichi Koyama
Citations per year, relative to Jun-ichi Koyama Jun-ichi Koyama (= 1×) peers André Luiz Ferreira Costa

Countries citing papers authored by Jun-ichi Koyama

Since Specialization
Citations

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

Fields of papers citing papers by Jun-ichi Koyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Jun-ichi Koyama. 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 Jun-ichi Koyama. The network helps show where Jun-ichi Koyama may publish in the future.

Co-authorship network of co-authors of Jun-ichi Koyama

This figure shows the co-authorship network connecting the top 25 collaborators of Jun-ichi Koyama. A scholar is included among the top collaborators of Jun-ichi Koyama 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 Jun-ichi Koyama. Jun-ichi Koyama 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.
Koyama, Jun-ichi, et al.. (2024). Forearm access for carotid artery stenting using the dual protection of flow reversal and distal filter: Trans-forearm dual protection technique. Interventional Neuroradiology. 3994347127–3994347127. 4 indexed citations
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Koyama, Jun-ichi, et al.. (2023). A new very-small-bore Simmons guiding sheath for transradial neurointervention: Technical note and initial experience. Journal of Neuroradiology. 51(2). 214–219. 3 indexed citations
4.
Koyama, Jun-ichi, Daisuke Yamazaki, Satoshi Kitamura, et al.. (2022). Transradial Mechanical Thrombectomy Using a Radial-specific Neurointerventional Guiding Sheath for Anterior Circulation Large-Vessel Occlusions: Preliminary Experience and Literature Review. World Neurosurgery. 171. e581–e589. 5 indexed citations
5.
Ogiwara, Toshihiro, Tetsuya Goto, Yu Fujii, et al.. (2022). The Current Status in Intraoperative Image-Guided Neurosurgery Associated with Progressive Operating Rooms: A Retrospective Analysis. World Neurosurgery. 167. e710–e716. 3 indexed citations
6.
Yamazaki, Ken, Jun-ichi Koyama, Daisuke Yamazaki, et al.. (2022). Contralateral Transradial Access for Coil Embolization of Distal Anterior Cerebral Artery Aneurysm Associated With a Steep Ipsilateral A1-A2 Angle. Journal of Stroke and Cerebrovascular Diseases. 31(3). 106299–106299. 2 indexed citations
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Koyama, Jun-ichi, et al.. (2021). The need for further study of microcatheter behavior through the trans-cell approach using a Neuroform Atlas stent. Journal of Neuroradiology. 48(5). 406–407. 1 indexed citations
9.
Koyama, Jun-ichi, et al.. (2021). Transradial quadraxial system for coil embolization of distal anterior cerebral artery aneurysms: A radial-first center case series and literature review. Journal of Neuroradiology. 49(2). 169–172. 11 indexed citations
10.
Koyama, Jun-ichi, et al.. (2021). Endovascular Revascularization with a Scoring Balloon for Carotid In-Stent Restenosis. Clinical Neuroradiology. 31(4). 1199–1204. 7 indexed citations
11.
Nakano, Tatsunori, Masaharu Takahashi, Kazuaki Takahashi, et al.. (2017). Hepatitis E virus subtype 3f strains isolated from Japanese hepatitis patients with no history of travel to endemic areas – The origin analyzed by molecular evolution. Virology. 513. 146–152. 13 indexed citations
12.
Sakai, Takashi, et al.. (2013). Evaluation of Texture of Aluminum Alloy Sheets by Laser Cutting. Journal of the Japan Society for Technology of Plasticity. 54(625). 170–174. 3 indexed citations
13.
Sakai, Takashi, et al.. (2013). Changes in Mechanical Properties and Microstructure of Aluminum Alloy Sheets with Laser Cutting. Journal of the Japan Society for Technology of Plasticity. 54(633). 923–927. 1 indexed citations
14.
Koyama, Jun-ichi, et al.. (2010). Development of Die-embedded Micro-sensing System. Journal of the Japan Society for Technology of Plasticity. 51(596). 898–902. 5 indexed citations
15.
Koyama, Jun-ichi, et al.. (2008). Effect of Beating Angle on Incremental In-Plane Bending of Sheet Metal. Journal of the Japan Society for Technology of Plasticity. 49(569). 579–583.
16.
Hongo, Kazuhiro, et al.. (2007). Telecontrolled micromanipulator system (NeuRobot) for minimally invasive neurosurgery. PubMed. 98. 63–66. 22 indexed citations
17.
Yamada, Kazuhiro, et al.. (2003). Thickness of the roof of the glenoid fossa and condylar bone change: a CT study. Dentomaxillofacial Radiology. 32(4). 217–221. 42 indexed citations
18.
Koyama, Jun-ichi, Kazuhiro Hongo, Hiroshi Okudera, et al.. (2002). Modified, Multipurpose, Radiolucent Sugita Head Frame for Intraoperative Cerebral Angiography. Neurosurgery. 51(4). 989–992. 1 indexed citations
19.
Hongo, Kazuhiro, Shigeaki Kobayashi, Yukinari Kakizawa, et al.. (2002). NeuRobot: Telecontrolled Micromanipulator System for Minimally Invasive Microneurosurgery—Preliminary Results. Neurosurgery. 51(4). 985–988. 77 indexed citations
20.
Iwashita, Tomomi, Yosuke Tanaka, Jun-ichi Koyama, Seiichi Kobayashi, & Kazuhiro Hongo. (2001). [A giant thrombosed aneurysm of the anterior communicating artery which developed 18 years after clipping: a case report].. PubMed. 29(5). 427–31. 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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