Kōji Takayama

3.0k total citations
132 papers, 2.2k citations indexed

About

Kōji Takayama is a scholar working on Genetics, Molecular Biology and Ecology, Evolution, Behavior and Systematics. According to data from OpenAlex, Kōji Takayama has authored 132 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 35 papers in Genetics, 31 papers in Molecular Biology and 28 papers in Ecology, Evolution, Behavior and Systematics. Recurrent topics in Kōji Takayama's work include Genetic diversity and population structure (28 papers), Marine and coastal plant biology (16 papers) and Plant and animal studies (14 papers). Kōji Takayama is often cited by papers focused on Genetic diversity and population structure (28 papers), Marine and coastal plant biology (16 papers) and Plant and animal studies (14 papers). Kōji Takayama collaborates with scholars based in Japan, Austria and United States. Kōji Takayama's co-authors include Tadashi Kajita, Tod F. Stuessy, Yoichi Tateishi, Takashi KASHIMOTO, Shuh Narumiya, Fumitaka Ushikubi, Takehiro Yamada, Osamu Takahata, Takayuki Fujino and Koh-ichi Yuhki and has published in prestigious journals such as Circulation, Journal of Clinical Investigation and Nature Medicine.

In The Last Decade

Kōji Takayama

125 papers receiving 2.1k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Kōji Takayama Japan 26 590 540 397 337 332 132 2.2k
Qing Xu China 21 610 1.0× 247 0.5× 233 0.6× 100 0.3× 171 0.5× 93 1.7k
Christopher D. Williams United States 25 524 0.9× 160 0.3× 366 0.9× 224 0.7× 179 0.5× 92 4.0k
Catherine Bernard France 28 1.0k 1.7× 223 0.4× 538 1.4× 52 0.2× 522 1.6× 71 2.5k
Tania Zenteno‐Savín Mexico 33 508 0.9× 363 0.7× 1.2k 3.1× 170 0.5× 168 0.5× 148 3.5k
Hongbo Liu China 39 2.4k 4.0× 486 0.9× 445 1.1× 65 0.2× 606 1.8× 208 4.4k
Wanda M. Haschek United States 37 972 1.6× 133 0.2× 147 0.4× 551 1.6× 1.6k 4.8× 122 4.4k
Purnima Singh United States 29 1.4k 2.3× 268 0.5× 501 1.3× 75 0.2× 207 0.6× 76 2.1k
Yuan Huang China 30 1.1k 1.8× 81 0.1× 331 0.8× 238 0.7× 149 0.4× 123 3.1k
Shigeru Nakano Japan 28 663 1.1× 127 0.2× 626 1.6× 149 0.4× 39 0.1× 86 3.3k

Countries citing papers authored by Kōji Takayama

Since Specialization
Citations

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

Fields of papers citing papers by Kōji Takayama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kōji Takayama

This figure shows the co-authorship network connecting the top 25 collaborators of Kōji Takayama. A scholar is included among the top collaborators of Kōji Takayama 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 Kōji Takayama. Kōji Takayama 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.
2.
3.
Iwata, Hiroyuki, et al.. (2024). Intraspecific divergence in a coastal plant, Euphorbia jolkinii, at a major biogeographic boundary in East Asia. American Journal of Botany. 111(5). e16327–e16327.
4.
Ikezaki, Hiroaki, Yuji Matsumoto, Sho Yamasaki, et al.. (2024). Impact of NAFLD-related SNPs on the carotid atherosclerosis development; a five-year prospective observational study. SHILAP Revista de lepidopterología. 59. 10–17. 1 indexed citations
5.
Suzuki, Mariko, et al.. (2023). Efficacy of electric fencing in preventing Amami rabbit (<i>Pentalagus furnessi</i>) invasions of agricultural lands. Nihon Chikusan Gakkaiho. 94(1). 61–68. 1 indexed citations
6.
7.
Takayama, Kōji, et al.. (2022). First record of potential bird pollination in the holoparasitic genus Orobanche L.. Plant Species Biology. 38(1). 6–17. 2 indexed citations
8.
9.
10.
11.
Murata, Masayuki, Kōji Takayama, Kazuhiro Toyoda, et al.. (2019). Prevalence and characteristics of occult hepatitis B virus infection in Japanese human immunodeficiency virus-infected patients. Journal of Infection and Chemotherapy. 26(1). 28–32. 11 indexed citations
12.
Murata, Masayuki, Kōji Takayama, Motohiro Shimizu, et al.. (2016). The Expression Level of Neutrophil CD64 Is a Useful Marker of Systemic Inflammation Associated with HIV Infection. AIDS Research and Human Retroviruses. 33(2). 147–156. 8 indexed citations
13.
Takayama, Kōji, Norihiro Furusyo, Eiichi Ogawa, et al.. (2014). A case of successful treatment with telaprevir-based triple therapy for hepatitis C infection after treatment failure with vaniprevir-based triple therapy. Journal of Infection and Chemotherapy. 20(9). 577–581. 3 indexed citations
14.
15.
Wee, Alison K. S., Kōji Takayama, Tadashi Kajita, & Edward L. Webb. (2013). Microsatellite loci for Avicennia alba (Acanthaceae), Sonneratia alba (Lythraceae) and Rhizophora mucronata (Rhizophoraceae).. JOURNAL OF TROPICAL FOREST SCIENCE. 25(1). 131–136. 6 indexed citations
16.
Takayama, Kōji, et al.. (2013). Effect of 4-Wire Electric Fences on the Invasion of Sika Deer (Cervus nippon) into the Meadow of a Livestock Farm. Nihon Chikusan Gakkaiho. 84(1). 81–88. 1 indexed citations
17.
Furusyo, Norihiro, Eiichi Ogawa, Masayuki Murata, et al.. (2013). Therapeutic drug monitoring of telaprevir in chronic hepatitis C patients receiving telaprevir-based triple therapy is useful for predicting virological response. Journal of Antimicrobial Chemotherapy. 69(2). 483–490. 13 indexed citations
18.
Takayama, Kōji, et al.. (2010). Clinical features of the 2009 swine-origin influenza A (H1N1) outbreak in Japan. Journal of Infection and Chemotherapy. 17(3). 401–406. 9 indexed citations
19.
Fujihara, Junko, et al.. (2005). Deoxyribonuclease I typing from tears. 22(2). 45–49. 3 indexed citations
20.
Fujihara, Junko, Yoko Hieda, Yoshio Tsujino, et al.. (2004). The levels of kerosene components in biological samples after repeated dermal exposure to kerosene in rats. Legal Medicine. 6(2). 109–116. 5 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Qing Xu Breakdown of academic impact, for papers by Christopher D. Williams Breakdown of academic impact, for papers by Catherine Bernard Breakdown of academic impact, for papers by Tania Zenteno‐Savín Breakdown of academic impact, for papers by Hongbo Liu Breakdown of academic impact, for papers by Wanda M. Haschek Breakdown of academic impact, for papers by Purnima Singh Breakdown of academic impact, for papers by Yuan Huang Breakdown of academic impact, for papers by Shigeru Nakano
Rankless by CCL
2026