Tsunemaro Koyama

1.0k total citations
31 papers, 736 citations indexed

About

Tsunemaro Koyama is a scholar working on Surgery, Pathology and Forensic Medicine and Public Health, Environmental and Occupational Health. According to data from OpenAlex, Tsunemaro Koyama has authored 31 papers receiving a total of 736 indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Surgery, 10 papers in Pathology and Forensic Medicine and 9 papers in Public Health, Environmental and Occupational Health. Recurrent topics in Tsunemaro Koyama's work include Spine and Intervertebral Disc Pathology (9 papers), Spinal Dysraphism and Malformations (8 papers) and Cervical and Thoracic Myelopathy (6 papers). Tsunemaro Koyama is often cited by papers focused on Spine and Intervertebral Disc Pathology (9 papers), Spinal Dysraphism and Malformations (8 papers) and Cervical and Thoracic Myelopathy (6 papers). Tsunemaro Koyama collaborates with scholars based in Japan and United Kingdom. Tsunemaro Koyama's co-authors include Minoru Hoshimaru, Jyoji Handa, Nobuo Hashimoto, Haruhiko Kikuchi, Iwao Nishiura, Kozo Nakamura, Akihiko Okawa, Yusuke Nakamura, Hiroshi Kawaguchi and Shinya Okuda and has published in prestigious journals such as Neurosurgery, Human Genetics and Journal of Neurology.

In The Last Decade

Tsunemaro Koyama

30 papers receiving 705 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Tsunemaro Koyama Japan	13	449	250	215	145	125	31	736
Chikao Nagashima Japan	14	411 0.9×	214 0.9×	217 1.0×	68 0.5×	98 0.8×	43	635
Y Guégan France	14	356 0.8×	193 0.8×	69 0.3×	58 0.4×	87 0.7×	47	714
L Stella Italy	14	453 1.0×	127 0.5×	75 0.3×	112 0.8×	321 2.6×	24	676
M. Banna United Kingdom	15	260 0.6×	281 1.1×	84 0.4×	61 0.4×	122 1.0×	60	835
Ziya Akar Türkiye	18	443 1.0×	274 1.1×	132 0.6×	42 0.3×	316 2.5×	37	760
F Vincentelli France	18	356 0.8×	617 2.5×	197 0.9×	110 0.8×	234 1.9×	46	1.0k
Niranjan Khandelwal India	14	257 0.6×	171 0.7×	96 0.4×	40 0.3×	53 0.4×	26	533
Tadashi Aiba Japan	15	277 0.6×	193 0.8×	45 0.2×	46 0.3×	160 1.3×	55	675
Abhay Sanan United States	13	432 1.0×	365 1.5×	88 0.4×	62 0.4×	427 3.4×	27	866
H. R. Eggert Germany	13	609 1.4×	391 1.6×	428 2.0×	73 0.5×	164 1.3×	26	1.0k

Countries citing papers authored by Tsunemaro Koyama

Since Specialization

Citations

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

Fields of papers citing papers by Tsunemaro Koyama

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Tsunemaro Koyama

This figure shows the co-authorship network connecting the top 25 collaborators of Tsunemaro Koyama. A scholar is included among the top collaborators of Tsunemaro 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 Tsunemaro Koyama. Tsunemaro Koyama is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Koyama, Tsunemaro, et al.. (2014). Dynamic Stabilization for Degenerative Spondylolisthesis and Lumbar Spinal Instability. Neurologia medico-chirurgica. 54(9). 698–706. 5 indexed citations

Nakamura, Isao, Shiro Ikegawa, Akihiko Okawa, et al.. (2007). 8. Association of the Human NPPS Gene with Ossification of the Posterior Longitudinal Ligament of the Spine (OPLL). The Spine Journal. 7(5). 4S–5S. 7 indexed citations

Hoshimaru, Minoru, et al.. (2005). Clinical Characteristics of Spinal Nerve Sheath Tumors: Analysis of 149 Cases. Neurosurgery. 56(3). 510–515. 140 indexed citations

Koyama, Tsunemaro. (2004). Intramedullary Spinal Cord Tumors:. Spinal Surgery. 18(2). 71–80. 1 indexed citations

Oda, Masashi, Jun Takahashi, Nobuo Hashimoto, & Tsunemaro Koyama. (2004). Rendu-Osler-Weber disease with a giant intracerebral varix secondary to a high-flow pial AVF: case report. Surgical Neurology. 61(4). 353–356. 13 indexed citations

Nakamizo, Tomoki, Haruhisa Inoue, Fukashi Udaka, et al.. (2002). Magnetic Resonance Imaging of Primary Spinal Intramedullary Lymphoma. Journal of Neuroimaging. 12(2). 183–186. 20 indexed citations

Nakamura, Isao, Shiro Ikegawa, Akihiko Okawa, et al.. (1999). Association of the human NPPS gene with ossification of the posterior longitudinal ligament of the spine (OPLL). Human Genetics. 104(6). 492–497. 147 indexed citations

Fujii, Tatsuya, Junko Ochi, Tomoko Miyajima, et al.. (1998). Nephrogenic diabetes insipidus and tethered cord syndrome with a lipoma of the cauda equina. Brain and Development. 20(1). 47–49. 2 indexed citations

Ikai, Yoshiaki, et al.. (1997). Surgical Treatment of Ossification of the Cervical Posterior Longitudinal Ligament : Retrospective Study of 240 Operated Cases. Spinal Surgery. 11(1). 53–60. 4 indexed citations

10.

Koyama, Tsunemaro. (1997). Our Operative Methods of Lumbar Canal Stenosis and Herniated Disc. Spinal Surgery. 11(2). 111–116. 1 indexed citations

11.

Okada, Takashi, et al.. (1996). Occult intrasacral meningocele associated with spina bifida: A case report. Surgical Neurology. 46(2). 147–149. 9 indexed citations

12.

Koyama, Tsunemaro & Hironori Fujisawa. (1995). Diagnosis and Surgical Treatment of Lumbar Disc Herniation. Japanese Journal of Neurosurgery. 4(2). 104–110. 1 indexed citations

13.

Koyama, Tsunemaro, et al.. (1994). Surgical Treatment of Communicating Syringomyelia. Spinal Surgery. 8(0). 25–30. 1 indexed citations

14.

Nishiura, Iwao, Tsunemaro Koyama, Jyoji Handa, & Shigeru Amano. (1989). Primary Intracranial Epidermoid Carcinoma. Neurologia medico-chirurgica. 29(7). 600–605. 29 indexed citations

15.

Handa, Jyoji, et al.. (1987). Clivus chordoma in childhood. Surgical Neurology. 28(1). 58–62. 36 indexed citations

16.

Koyama, Tsunemaro, et al.. (1986). A rare anomaly of the axis: Report of a case with shaded three-dimensional computed tomographic display. Surgical Neurology. 25(5). 491–494. 21 indexed citations

17.

Koyama, Tsunemaro & Jyoji Handa. (1986). Porous hydroxyapatite ceramics for use in neurosurgical practice. Surgical Neurology. 25(1). 71–73. 34 indexed citations

18.

Nishiura, Iwao, Tsunemaro Koyama, & Jyoji Handa. (1985). Intrasacral perineurial cyst. Surgical Neurology. 23(3). 265–269. 37 indexed citations

19.

Kondo, Akinori, et al.. (1980). Occipito-Vertebral Anastomosis; Its Clinical Significance. Neurologia medico-chirurgica. 20(1). 61–66. 2 indexed citations

20.

Koyama, Tsunemaro, Jyoji Handa, Hajime Handa, & Satoshi Matsumoto. (1972). Experimental hydrocephalus. Postnatal observations of hydrocephalus induced by ethylnitrosourea in SD-JCL rat.. PubMed. 202(1). 21–36. 6 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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