Hirofumi Koyama

1.2k total citations
54 papers, 905 citations indexed

About

Hirofumi Koyama is a scholar working on Molecular Biology, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Hirofumi Koyama has authored 54 papers receiving a total of 905 indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Molecular Biology, 9 papers in Pulmonary and Respiratory Medicine and 9 papers in Oncology. Recurrent topics in Hirofumi Koyama's work include Gastric Cancer Management and Outcomes (7 papers), Oral and Maxillofacial Pathology (4 papers) and Genomics and Chromatin Dynamics (4 papers). Hirofumi Koyama is often cited by papers focused on Gastric Cancer Management and Outcomes (7 papers), Oral and Maxillofacial Pathology (4 papers) and Genomics and Chromatin Dynamics (4 papers). Hirofumi Koyama collaborates with scholars based in Japan, United States and France. Hirofumi Koyama's co-authors include Akira Kikuchi, Akira Sato, Hiroshi Sakane, Hideki Yamamoto, Shinkichi Tawata, Tran Dang Xuan, Abdelnaser A. Elzaawely, Eiko Tsuchiya, Takahiko Shimizu and Kohji Miyahara and has published in prestigious journals such as Journal of Biological Chemistry, The EMBO Journal and PLoS ONE.

In The Last Decade

Hirofumi Koyama

47 papers receiving 872 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hirofumi Koyama Japan 15 530 92 90 89 76 54 905
Xiuli Lu China 19 450 0.8× 84 0.9× 46 0.5× 72 0.8× 169 2.2× 44 883
Chang Lim Hyun South Korea 18 331 0.6× 50 0.5× 187 2.1× 82 0.9× 118 1.6× 95 1.0k
Luciano Galdieri United States 17 700 1.3× 80 0.9× 73 0.8× 71 0.8× 94 1.2× 25 1.0k
Toshihiro Kurahashi Japan 18 576 1.1× 139 1.5× 86 1.0× 69 0.8× 71 0.9× 34 1.1k
Laurent Léotoing France 13 519 1.0× 44 0.5× 140 1.6× 61 0.7× 80 1.1× 16 1.0k
Zhen Yu China 18 537 1.0× 64 0.7× 114 1.3× 80 0.9× 37 0.5× 54 1.2k
J. Grünwald Germany 15 429 0.8× 115 1.3× 43 0.5× 72 0.8× 139 1.8× 40 1.1k
Jing Tian China 18 483 0.9× 102 1.1× 89 1.0× 55 0.6× 107 1.4× 76 1.0k
Vincent A. DeLeo United States 16 288 0.5× 122 1.3× 55 0.6× 71 0.8× 27 0.4× 28 926
Ana Díaz Spain 17 492 0.9× 67 0.7× 46 0.5× 94 1.1× 197 2.6× 44 1.3k

Countries citing papers authored by Hirofumi Koyama

Since Specialization
Citations

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

Fields of papers citing papers by Hirofumi Koyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hirofumi Koyama

This figure shows the co-authorship network connecting the top 25 collaborators of Hirofumi Koyama. A scholar is included among the top collaborators of Hirofumi 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 Hirofumi Koyama. Hirofumi 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.
Ono, Yusuke, Michiko Kishida, Hirofumi Koyama, et al.. (2023). Interleukin‐1α promotes matrix metalloproteinase‐9 expression, cellular motility, and local invasiveness of ameloblastoma cells. Oral Science International. 21(1). 112–120. 1 indexed citations
2.
Koyama, Hirofumi, Yusuke Ono, Mikio Iijima, et al.. (2022). Intercellular signaling between ameloblastoma and osteoblasts. Biochemistry and Biophysics Reports. 30. 101233–101233. 5 indexed citations
3.
Sato, Akira, Hisako Kayama, Kensaku Shojima, et al.. (2015). The Wnt5a-Ror2 axis promotes the signaling circuit between interleukin-12 and interferon-γ in colitis. Scientific Reports. 5(1). 52 indexed citations
4.
Shimamoto, Akira, Harunobu Kagawa, Yasuhiro Kazuki, et al.. (2014). Reprogramming Suppresses Premature Senescence Phenotypes of Werner Syndrome Cells and Maintains Chromosomal Stability over Long-Term Culture. PLoS ONE. 9(11). e112900–e112900. 42 indexed citations
5.
MATSUMOTO, Akira, et al.. (2013). EFFECTIVE METHODS FOR COVERING BREAKWATER RUBBLE MOUNDS AGAINST TSUNAMI USING FILTER UNITS. Journal of Japan Society of Civil Engineers Ser B3 (Ocean Engineering). 69(2). I_479–I_484. 5 indexed citations
6.
MIZUTANI, Norimi, et al.. (2009). Local Scour In Front of Quay Wall Caused By Bow Thruster And Its Countermeasure Using Filter Units. 1280–1287. 2 indexed citations
7.
Sato, Akira, Hideki Yamamoto, Hiroshi Sakane, Hirofumi Koyama, & Akira Kikuchi. (2009). Wnt5a regulates distinct signalling pathways by binding to Frizzled2. The EMBO Journal. 29(1). 41–54. 258 indexed citations
8.
MIZUTANI, Norimi, et al.. (2007). Study On a Wave Force Acting On a Filter Unit On Sloping Breakwater And Its Stability.
9.
Ihara, Motomasa, Hirofumi Koyama, Yasuhiro Uchimura, Hisato Saitoh, & Akira Kikuchi. (2007). Noncovalent Binding of Small Ubiquitin-related Modifier (SUMO) Protease to SUMO Is Necessary for Enzymatic Activities and Cell Growth. Journal of Biological Chemistry. 282(22). 16465–16475. 19 indexed citations
10.
Koyama, Hirofumi, Masayuki Itoh, Kohji Miyahara, & Eiko Tsuchiya. (2002). Abundance of the RSC nucleosome‐remodeling complex is important for the cells to tolerate DNA damage in Saccharomyces cerevisiae. FEBS Letters. 531(2). 215–221. 31 indexed citations
11.
Masuno, Mitsuo, Akihiko Okawa, Minoru Isomura, et al.. (1999). Cloning of translocation breakpoints associated with Shwachman syndrome and identification of a candidate gene. Clinical Genetics. 55(6). 466–472. 10 indexed citations
12.
Noguchi, Shinzaburo, Kenta Motomura, Hideo Inaji, & Hirofumi Koyama. (1995). [Prognostic factors for breast cancer].. PubMed. 22(9). 1279–84.
13.
Sugano, Kokichi, Masaru Ishii, Hirofumi Koyama, et al.. (1994). [Clinical study of serum ErbB-2 protein using sandwich radioimmunometric assay (ErbB-2 IRMA 'Eiken')].. PubMed. 21(8). 1245–53. 1 indexed citations
14.
Sugano, Kokichi, Hirofumi Koyama, Masaki Kitajima, et al.. (1994). [Clinical evaluation of serum ErbB-2 protein using enzyme immuno assay (ErbB-2 EIA [Nichirei])].. PubMed. 21(8). 1255–62. 5 indexed citations
15.
Sugano, Kokichi, Masaki Kitajima, Masaru Ishii, et al.. (1994). [Clinical evaluation of ErbB-2 protein in tissue extract using an enzyme immuno assay (ErbB-2 EIA "Nichirei")].. PubMed. 21(12). 1957–66. 5 indexed citations
16.
Hasegawa, S., et al.. (1992). Glucose Utilization in Cats, Dogs and Cows Measured by Euglycemic Insulin Clamp Technique.. Journal of Veterinary Medical Science. 54(3). 583–584. 2 indexed citations
17.
Kodama, Masashi, et al.. (1991). Clinicopathology of Cancer in Gastric Remnant. Comparing with that of Primary Cancer Located in Upper Third of Stomach.. The Japanese Journal of Gastroenterological Surgery. 24(7). 1927–1931.
18.
Takahashi, Masahiro, Hitoshi Kotanagi, Hisashi Kusaka, et al.. (1991). Inhibitory Effect of Dietary Perilla Oil Rich in the n‐3 Polyunsaturated Fatty Acid α‐Linolenic Acid on Colon Carcinogenesis in Rats. Japanese Journal of Cancer Research. 82(10). 1089–1096. 50 indexed citations
19.
Kodama, Masashi, et al.. (1990). Group I pepsinogen for early detection of gastric cancer recurrence after total gastrectomy. World Journal of Surgery. 14(1). 94–99. 4 indexed citations
20.
Kameyama, Masao, M Hiratsuka, H Furukawa, et al.. (1988). [A case of colorectal cancer showing complete response to UFT].. PubMed. 15(6). 1969–72. 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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