Kazumasa Oka

834 total citations
30 papers, 327 citations indexed

About

Kazumasa Oka is a scholar working on Nephrology, Surgery and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Kazumasa Oka has authored 30 papers receiving a total of 327 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Nephrology, 7 papers in Surgery and 7 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Kazumasa Oka's work include Renal Diseases and Glomerulopathies (10 papers), Renal Transplantation Outcomes and Treatments (6 papers) and Parvovirus B19 Infection Studies (4 papers). Kazumasa Oka is often cited by papers focused on Renal Diseases and Glomerulopathies (10 papers), Renal Transplantation Outcomes and Treatments (6 papers) and Parvovirus B19 Infection Studies (4 papers). Kazumasa Oka collaborates with scholars based in Japan, China and United States. Kazumasa Oka's co-authors include Enyu Imai, Toshiki Moriyama, Masahiro Kyo, Äkïhïko Okuyama, Shiro Takahara, Kiyohide Toki, Y Kokado, Masatsugu Hori, Yoshitaka Akagi and Ryoichi Imamura and has published in prestigious journals such as SHILAP Revista de lepidopterología, Scientific Reports and Biochemical and Biophysical Research Communications.

In The Last Decade

Kazumasa Oka

30 papers receiving 322 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Kazumasa Oka Japan 12 123 85 77 54 49 30 327
Catherine Bonvoisin Belgium 13 49 0.4× 68 0.8× 145 1.9× 77 1.4× 25 0.5× 29 434
Valeria Corradetti Italy 9 62 0.5× 21 0.2× 59 0.8× 32 0.6× 41 0.8× 34 329
Elena G. Kamburova Netherlands 8 80 0.7× 89 1.0× 192 2.5× 20 0.4× 63 1.3× 15 405
Eva Honsová Czechia 13 82 0.7× 52 0.6× 242 3.1× 28 0.5× 70 1.4× 32 478
Michelle Long Schoettler United States 9 44 0.4× 31 0.4× 106 1.4× 31 0.6× 17 0.3× 39 366
Rolla Abu‐Arja United States 11 26 0.2× 57 0.7× 12 0.2× 28 0.5× 28 0.6× 44 334
Anjali Nayak India 6 33 0.3× 15 0.2× 23 0.3× 23 0.4× 31 0.6× 15 373
M. Gokel Germany 7 125 1.0× 31 0.4× 283 3.7× 37 0.7× 50 1.0× 25 499
Paul S. Furmanczyk United States 10 12 0.1× 81 1.0× 15 0.2× 91 1.7× 45 0.9× 11 308
Maria Stack United States 11 33 0.3× 233 2.7× 7 0.1× 112 2.1× 36 0.7× 18 515

Countries citing papers authored by Kazumasa Oka

Since Specialization
Citations

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

Fields of papers citing papers by Kazumasa Oka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kazumasa Oka

This figure shows the co-authorship network connecting the top 25 collaborators of Kazumasa Oka. A scholar is included among the top collaborators of Kazumasa Oka 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 Kazumasa Oka. Kazumasa Oka 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.
Kawaguchi, Takehiko, Toshiyuki Imasawa, Moritoshi Kadomura, et al.. (2021). Focal segmental glomerulosclerosis histologic variants and renal outcomes based on nephrotic syndrome, immunosuppression and proteinuria remission. Nephrology Dialysis Transplantation. 37(9). 1679–1690. 5 indexed citations
2.
Maruyama, Shoichi, Toshiyuki Imasawa, Takehiko Kawaguchi, et al.. (2021). Clinical manifestations of focal segmental glomerulosclerosis in Japan from the Japan Renal Biopsy Registry: age stratification and comparison with minimal change disease. Scientific Reports. 11(1). 2602–2602. 6 indexed citations
3.
Sekiguchi, Masahiro, et al.. (2021). Mycobacterial lymphadenitis without granuloma formation in a patient with anti-interferon-gamma antibodies. International Journal of Hematology. 114(5). 630–635. 5 indexed citations
4.
Yamanaka, Kazuaki, Kazumasa Oka, T. Imanaka, et al.. (2019). Immunoenzymatic Staining of Caveolin-1 in Formalin-Fixed Renal Graft Showing Chronic Antibody Mediated Rejection. Transplantation Proceedings. 51(5). 1387–1391. 1 indexed citations
5.
Yasunaga, Yuichi, Kazumasa Oka, Eri Tanaka, et al.. (2018). Submucosal fat accumulation in human colorectal tissue and its association with abdominal obesity and insulin resistance. United European Gastroenterology Journal. 6(7). 1065–1073. 12 indexed citations
6.
Tanaka, Mari, et al.. (2017). Clinicopathological features of progressive renal involvement in TAFRO syndrome. Medicine. 96(40). e8216–e8216. 19 indexed citations
7.
Oka, Kazumasa, Kenji Nishimura, Hidefumi Kishikawa, & Yasuji Ichikawa. (2016). IgA1 dominant subclass of latent IgA mesangial deposition in donated kidney. International Journal of Nephrology and Renovascular Disease. Volume 9. 313–317. 3 indexed citations
8.
Kobayashi, Kenichi, Ryoichi Imamura, Shingo Takada, et al.. (2013). [Endocervicosis/endosalpingiosis of the bladder: a case report].. PubMed. 59(3). 175–7. 3 indexed citations
9.
Yamamoto, Keisuke, et al.. (2009). A Case of MALT Lymphoma in the Parotid Gland. Practica Oto-Rhino-Laryngologica. 102(5). 353–358. 1 indexed citations
10.
Furuzono, Tsutomu, et al.. (2008). Histological reaction of sintered nanohydroxyapatite‐coated cuff and its fibroblast‐like cell hybrid for an indwelling catheter. Journal of Biomedical Materials Research Part B Applied Biomaterials. 89B(1). 77–85. 22 indexed citations
11.
Iwatani, Hirotsugu, Yasuyuki Nagasawa, Kazumasa Oka, Yoshitaka Isaka, & Enyu Imai. (2008). Valvular injury in a patient with PR3-ANCA-associated glomerulonephritis. Nature Clinical Practice Nephrology. 4(10). 576–582. 2 indexed citations
12.
Sugimoto, Toshiro, Naoko Takeda, Masayoshi Sakaguchi, et al.. (2008). A Case of Castleman’s Disease Complicated With Nephrotic Syndrome Due to Glomerulopathy Mimicking Membranoproliferative Glomerulonephritis. The American Journal of the Medical Sciences. 335(6). 495–498. 11 indexed citations
13.
Oritani, Kenji, Takafumi Yokota, Isao Takahashi, et al.. (2007). Adiponectin binds to chemokines via the globular head and modulates interactions between chemokines and heparan sulfates. Experimental Hematology. 35(6). 947–956. 34 indexed citations
14.
Shi, Yi, Toshiki Moriyama, Masaki Yamanaka, et al.. (2007). Association of treatment with 15‐deoxyspergualin and BK virus nephropathy in kidney allograft recipients. Clinical Transplantation. 21(4). 502–509. 14 indexed citations
15.
Moriyama, Toshiki, Kazumasa Oka, Hirotsugu Ueda, & Enyu Imai. (2004). Nilvadipine attenuates mesangial expansion and glomerular hypertrophy in diabetic db/db mice, a model for type 2 diabetes. Clinical and Experimental Nephrology. 8(3). 230–236. 16 indexed citations
16.
Nakatsuka, Shin‐ichi, Zhiming Dong, Tetsuya Takakuwa, et al.. (2004). NK‐cell related neoplasms in Osaka, Japan. American Journal of Hematology. 76(3). 230–235. 8 indexed citations
17.
Oka, Kazumasa, Enyu Imai, Masahiro Kyo, et al.. (2001). A case of tacrolimus nephrotoxicity appearing in a second renal transplantation patient. Clinical Transplantation. 15(s5). 30–34. 3 indexed citations
18.
Tanaka, Toshiyuki, Kiyohide Toki, Sompol Permpongkosol, et al.. (2001). The differences between late graft loss group and long‐term graft survival group in renal transplantation. Clinical Transplantation. 15(s5). 16–21. 5 indexed citations
19.
Oka, Kazumasa, Toshiki Moriyama, Masaaki Izumi, et al.. (2000). A case of relapse of C‐ANCA‐associated glomerulonephritis in post‐transplant patients. Clinical Transplantation. 14(S3). 33–36. 7 indexed citations
20.
Toki, Kiyohide, Masahiro Kyo, S Takahara, et al.. (2000). Arteriolopathy in non‐episode biopsies of renal transplant allograft. Clinical Transplantation. 14(S3). 21–24. 3 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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