Jun Niwa

1.1k total citations
64 papers, 698 citations indexed

About

Jun Niwa is a scholar working on Neurology, Surgery and Epidemiology. According to data from OpenAlex, Jun Niwa has authored 64 papers receiving a total of 698 indexed citations (citations by other indexed papers that have themselves been cited), including 37 papers in Neurology, 15 papers in Surgery and 14 papers in Epidemiology. Recurrent topics in Jun Niwa's work include Intracerebral and Subarachnoid Hemorrhage Research (18 papers), Neurosurgical Procedures and Complications (12 papers) and Intracranial Aneurysms: Treatment and Complications (12 papers). Jun Niwa is often cited by papers focused on Intracerebral and Subarachnoid Hemorrhage Research (18 papers), Neurosurgical Procedures and Complications (12 papers) and Intracranial Aneurysms: Treatment and Complications (12 papers). Jun Niwa collaborates with scholars based in Japan and Israel. Jun Niwa's co-authors include Toshio Imaizumi, Kazuo Hashi, Yoshifumi Horita, Yuji Hashimoto, Tõru Nakamura, Takashi Minase, Hiroki Takahashi, Shozo Urasawa, Satoshi Tanabe and T Uede and has published in prestigious journals such as Stroke, Journal of neurosurgery and Experimental Cell Research.

In The Last Decade

Jun Niwa

64 papers receiving 659 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Jun Niwa Japan 13 476 217 111 86 80 64 698
Servet İnci Türkiye 17 437 0.9× 115 0.5× 96 0.9× 172 2.0× 147 1.8× 48 797
Elvira Munteis Spain 19 230 0.5× 275 1.3× 204 1.8× 61 0.7× 103 1.3× 37 766
Chun-Yu Cheng Taiwan 12 171 0.4× 135 0.6× 26 0.2× 97 1.1× 77 1.0× 43 429
Smaranda Maier Romania 14 153 0.3× 71 0.3× 102 0.9× 43 0.5× 69 0.9× 71 507
Nicolas K. Khattar United States 13 276 0.6× 193 0.9× 107 1.0× 146 1.7× 105 1.3× 45 599
Hayri Kertmen Türkiye 16 223 0.5× 63 0.3× 195 1.8× 158 1.8× 32 0.4× 60 591
P. Carpentier France 10 86 0.2× 68 0.3× 45 0.4× 230 2.7× 33 0.4× 41 645
Ridha Mrissa Tunisia 12 196 0.4× 58 0.3× 61 0.5× 35 0.4× 23 0.3× 64 471
Keith A. Kattner United States 13 180 0.4× 63 0.3× 154 1.4× 213 2.5× 85 1.1× 22 583
Loris Poli Italy 16 241 0.5× 112 0.5× 17 0.2× 248 2.9× 177 2.2× 45 701

Countries citing papers authored by Jun Niwa

Since Specialization
Citations

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

Fields of papers citing papers by Jun Niwa

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Jun Niwa

This figure shows the co-authorship network connecting the top 25 collaborators of Jun Niwa. A scholar is included among the top collaborators of Jun Niwa 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 Niwa. Jun Niwa 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.
Imaizumi, Toshio, Yoshifumi Horita, Maiko Kawamura, et al.. (2008). The Number of Microbleeds on Gradient T2∗-weighted Magnetic Resonance Image at the Onset of Intracerebral Hemorrhage. Journal of Stroke and Cerebrovascular Diseases. 17(1). 30–34. 11 indexed citations
2.
Imaizumi, Toshio, Yuji Hashimoto, Jun Niwa, & Yoshifumi Horita. (2008). Subarachnoid hemosiderin deposition after subarachnoid hemorrhage on T2*-weighted MRI correlates with the location of disturbed cerebrospinal fluid flow on computed tomography cisternography. Neurology India. 56(1). 62–62. 2 indexed citations
3.
Imaizumi, Toshio, Yoshifumi Horita, Maiko Kawamura, et al.. (2007). Dynamics of Dot‐Like Hemosiderin Spots on T2*‐Weighted MRIs Associated with Stroke Recurrence. Journal of Neuroimaging. 17(3). 204–210. 9 indexed citations
4.
Hashimoto, Yuji, et al.. (2007). Pitfalls in the preoperative evaluation of subarachnoid hemorrhage without digital subtraction angiography: report on 2 cases. Surgical Neurology. 68(3). 344–348. 4 indexed citations
5.
Imaizumi, Toshio, Yoshifumi Horita, Ikuhide Kohama, et al.. (2006). Hematoma Size in Deep Intracerebral Hemorrhage and its Correlation with Dot‐Like Hemosiderin Spots on Gradient Echo T2*‐Weighted MRI. Journal of Neuroimaging. 16(3). 236–242. 2 indexed citations
6.
Imaizumi, Toshio, Yoshifumi Horita, Kei Miyata, et al.. (2006). Dot-Like Hemosiderin Deposition on T2*-Weighted MR Imaging Associated with Nonhypertensive Intracerebral Hemorrhage. Journal of Neuroimaging. 16(1). 39–46. 6 indexed citations
7.
Mikami, Takeshi, Nobuo Masauzi, Jun Niwa, & Kiyohiro Houkin. (2005). Acquired Factor VIII Inhibitors in a Patient Associated with Neurosurgery: Case Report and Review of the Literature. Neurosurgery. 57(3). E595–E595. 6 indexed citations
8.
Imaizumi, Toshio, et al.. (2004). Cerebral Blood Flow before and after Treatment with Amlodipine in Elderly Patients with Lacunar Infarction. Clinical Drug Investigation. 24(12). 765–769. 2 indexed citations
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Imaizumi, Toshio, et al.. (2002). [Preemptive analgesia for postoperative pain after frontotemporal craniotomy].. PubMed. 30(2). 171–4. 8 indexed citations
12.
Niwa, Jun, et al.. (1997). Transcondylar Approach for Dural Arteriovenous Fistulas of the Cervicomedullary Junction. Surgical Neurology. 48(6). 627–631. 26 indexed citations
13.
Niwa, Jun, Kazuo Hashi, & Takashi Minase. (1996). Radiation induced intracranial leiomyosarcoma: Its histopathological features. Acta Neurochirurgica. 138(12). 1470–1471. 22 indexed citations
14.
Niwa, Jun, Satoshi Tanabe, & Kazuo Hashi. (1996). [Seizures as a late complication of bromocriptine therapy in patients with prolactin-producing macroadenomas: correlation between lateral extension of the adenoma and seizure onset].. PubMed. 24(10). 913–9. 2 indexed citations
15.
Hashi, Kazuo, Jun Niwa, Satoshi Tanabe, et al.. (1992). Results of reoperation for failed microvascular decompression. Acta Neurochirurgica. 115(1-2). 1–7. 58 indexed citations
16.
Niwa, Jun, et al.. (1991). Large-sized brain metastasis of lung cancer without perifocal edema: Case report. Computerized Medical Imaging and Graphics. 15(2). 121–124. 1 indexed citations
17.
Niwa, Jun, et al.. (1989). [Traumatic rupture of the vertebral artery associated with fracture of the cervical spine: a case report].. PubMed. 17(10). 973–7. 3 indexed citations
18.
Niwa, Jun, et al.. (1988). Removal of a large asymptomatic calcified chronic subdural hematoma. Surgical Neurology. 30(2). 135–139. 36 indexed citations
19.
Uede, T, et al.. (1988). Extensive spinal necrosis with spinal leptomeningeal dissemination of cerebral astrocytoma. Acta Neurochirurgica. 93(3-4). 146–148. 2 indexed citations
20.

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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