Masahiko Okuma

2.1k total citations · 1 hit paper
19 papers, 1.7k citations indexed

About

Masahiko Okuma is a scholar working on Pathology and Forensic Medicine, Pharmacology and Molecular Biology. According to data from OpenAlex, Masahiko Okuma has authored 19 papers receiving a total of 1.7k indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Pathology and Forensic Medicine, 10 papers in Pharmacology and 5 papers in Molecular Biology. Recurrent topics in Masahiko Okuma's work include Spine and Intervertebral Disc Pathology (14 papers), Musculoskeletal pain and rehabilitation (8 papers) and Estrogen and related hormone effects (3 papers). Masahiko Okuma is often cited by papers focused on Spine and Intervertebral Disc Pathology (14 papers), Musculoskeletal pain and rehabilitation (8 papers) and Estrogen and related hormone effects (3 papers). Masahiko Okuma collaborates with scholars based in Japan and United States. Masahiko Okuma's co-authors include Howard S. An, Koichi Masuda, Carol Muehleman, Yoshiyuki Imai, Joji Mochida, Kazuhiro Nishimura, Gunnar B. J. Andersson, Eugene J-M.A. Thonar, Yoichi Aota and Kou Sakabe and has published in prestigious journals such as Biomaterials, Spine and Clinical Orthopaedics and Related Research.

In The Last Decade

Masahiko Okuma

19 papers receiving 1.7k citations

Hit Papers

A Novel Rabbit Model of M... 2005 2026 2012 2019 2005 100 200 300 400 500
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. A Novel Rabbit Model of Mild, Reproducible Disc Degeneration by an Anulus Needle Puncture: Correlation Between the Degree of Disc Injury and Radiological and Histological Appearances of Disc Degeneration
    2005 599 citations Koichi Masuda, Yoichi Aota et al. Spine profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Masahiko Okuma Japan 11 1.5k 1.1k 780 289 195 19 1.7k
Dike Ruan China 25 1.0k 0.7× 528 0.5× 752 1.0× 249 0.9× 164 0.8× 85 1.7k
Gretchen L. Hoelscher United States 25 1.1k 0.7× 784 0.7× 632 0.8× 214 0.7× 153 0.8× 49 1.7k
Jane A. Ingram United States 28 1.4k 0.9× 1.0k 0.9× 632 0.8× 270 0.9× 203 1.0× 61 2.1k
Devina Purmessur United States 24 1.4k 0.9× 1.1k 1.0× 490 0.6× 180 0.6× 156 0.8× 41 1.7k
Svenja Illien‐Jünger United States 22 1.1k 0.7× 839 0.8× 559 0.7× 185 0.6× 128 0.7× 30 1.3k
Helena Evans United Kingdom 11 1.1k 0.7× 744 0.7× 678 0.9× 308 1.1× 123 0.6× 13 1.6k
William Mark Erwin Canada 18 1.1k 0.7× 496 0.5× 674 0.9× 111 0.4× 112 0.6× 34 1.3k
Satoshi Sobajima Japan 15 805 0.5× 600 0.6× 574 0.7× 218 0.8× 135 0.7× 29 1.4k
Toru Iwashina Japan 11 869 0.6× 616 0.6× 434 0.6× 276 1.0× 168 0.9× 12 1.1k
A.P. Hollander United Kingdom 7 759 0.5× 585 0.5× 450 0.6× 245 0.8× 107 0.5× 10 1.1k

Countries citing papers authored by Masahiko Okuma

Since Specialization
Citations

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

Fields of papers citing papers by Masahiko Okuma

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Masahiko Okuma

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

All Works

19 of 19 papers shown
1.
2.
Masuda, Koichi, Yoshiyuki Imai, Masahiko Okuma, et al.. (2006). Osteogenic Protein-1 Injection Into a Degenerated Disc Induces the Restoration of Disc Height and Structural Changes in the Rabbit Anular Puncture Model. Spine. 31(7). 742–754. 231 indexed citations
3.
4.
Miyamoto, Kei, Howard S. An, Robert L. Sah, et al.. (2005). Exposure to Pulsed Low Intensity Ultrasound Stimulates Extracellular Matrix Metabolism of Bovine Intervertebral Disc Cells Cultured in Alginate Beads. Spine. 30(21). 2398–2405. 32 indexed citations
5.
Masuda, Koichi, Yoichi Aota, Carol Muehleman, et al.. (2005). A Novel Rabbit Model of Mild, Reproducible Disc Degeneration by an Anulus Needle Puncture: Correlation Between the Degree of Disc Injury and Radiological and Histological Appearances of Disc Degeneration. Spine. 30(1). 5–14. 599 indexed citations breakdown →
6.
7.
Okuma, Masahiko, Howard S. An, Koichi Nakagawa, et al.. (2004). P89. Oral administration of a prodrug of esculetin derivative inhibits intervertebral disc degeneration in the rabbit needle puncture model. The Spine Journal. 4(5). S102–S103. 2 indexed citations
8.
Watanabe, Keita, et al.. (2003). Effect of Reinsertion of Activated Nucleus Pulposus on Disc Degeneration: An Experimental Study on Various Types of Collagen in Degenerative Discs. Connective Tissue Research. 44(2). 104–108. 10 indexed citations
9.
Sakai, Daisuke, Joji Mochida, Y. Yamamoto, et al.. (2003). Transplantation of mesenchymal stem cells embedded in Atelocollagen® gel to the intervertebral disc: a potential therapeutic model for disc degeneration. Biomaterials. 24(20). 3531–3541. 344 indexed citations
10.
Masuda, Koichi, Yoshiyuki Imai, Masahiko Okuma, et al.. (2003). 10. Injection of OP-1 induces the recovery of disc height after chondroitinase abc-induced intervertebral disc degeneration in the rabbit. The Spine Journal. 3(5). 71–71. 1 indexed citations
11.
Watanabe, Keita, Joji Mochida, Takeshi Nomura, et al.. (2003). Effect of Reinsertion of Activated Nucleus Pulposus on Disc Degeneration: An Experimental Study on Various Types of Collagen in Degenerative Discs. Connective Tissue Research. 44(2). 104–108. 32 indexed citations
12.
Nomura, Takeshi, Joji Mochida, Masahiko Okuma, Kazuhiro Nishimura, & Kou Sakabe. (2001). Nucleus Pulposus Allograft Retards Intervertebral Disc Degeneration. Clinical Orthopaedics and Related Research. 389(389). 94–101. 161 indexed citations
13.
Mochida, Joji, Kazuhiro Nishimura, Masahiko Okuma, Takeshi Nomura, & Eiren Toh. (2001). Percutaneous Nucleotomy in Elite Athletes. Journal of Spinal Disorders. 14(2). 159–164. 17 indexed citations
14.
15.
Okuma, Masahiko, Joji Mochida, Kazuhiro Nishimura, Kou Sakabe, & Kanji Seiki. (2000). Reinsertion of stimulated nucleus pulposus cells retards intervertebral disc degeneration: An in vitro and in vivo experimental study. Journal of Orthopaedic Research®. 18(6). 988–997. 159 indexed citations
16.
Sakabe, Kou, et al.. (1999). Inhibitory effect of natural and environmental estrogens on thymic hormone production in thymus epithelial cell culture. International Journal of Immunopharmacology. 21(12). 861–868. 19 indexed citations
17.
Sakabe, Kou, Masahiko Okuma, Toshiya Yamaguchi, et al.. (1998). Estrogenic xenobiotics affect the intracellular activation signal in mitogen-induced human peripheral blood lymphocytes : immunotoxicological impact. International Journal of Immunopharmacology. 20(4-5). 205–212. 2 indexed citations
18.
He, Wei, Kou Sakabe, Masahiko Okuma, Tsunetoshi Itoh, & Kanji Seiki. (1998). Sex steroid modulation of signal transduction in thymus epithelial cell culture. Pathophysiology. 4(4). 281–288. 1 indexed citations
19.
Sakabe, Kou, et al.. (1998). Sex hormones affect the intracellular activation signal in mitogen-stimulated human blood lymphocytes. Pathophysiology. 5(1). 73–77. 2 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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