Takeshi Ohsawa

634 total citations
35 papers, 490 citations indexed

About

Takeshi Ohsawa is a scholar working on Ecology, Evolution, Behavior and Systematics, Molecular Biology and Plant Science. According to data from OpenAlex, Takeshi Ohsawa has authored 35 papers receiving a total of 490 indexed citations (citations by other indexed papers that have themselves been cited), including 22 papers in Ecology, Evolution, Behavior and Systematics, 14 papers in Molecular Biology and 7 papers in Plant Science. Recurrent topics in Takeshi Ohsawa's work include Plant Diversity and Evolution (18 papers), Plant and Fungal Species Descriptions (11 papers) and Plant and animal studies (9 papers). Takeshi Ohsawa is often cited by papers focused on Plant Diversity and Evolution (18 papers), Plant and Fungal Species Descriptions (11 papers) and Plant and animal studies (9 papers). Takeshi Ohsawa collaborates with scholars based in Japan, Chile and Mexico. Takeshi Ohsawa's co-authors include Makoto Nishida, Harufumi Nishida, Masahiko Ohsawa, Yasuyuki Watano, Akiko Sakai, Yoshihisa Suyama, Hiroshi Yoshida, Ken‐ichi Michi, Kunio Iwatsuki and Motomi Itô and has published in prestigious journals such as PLoS ONE, Molecular Ecology and Annals of Botany.

In The Last Decade

Takeshi Ohsawa

33 papers receiving 450 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Takeshi Ohsawa Japan 14 322 187 104 71 70 35 490
Conny Thiel‐Egenter Switzerland 7 210 0.7× 70 0.4× 150 1.4× 249 3.5× 154 2.2× 7 474
Kyoko Aoki Japan 12 216 0.7× 185 1.0× 156 1.5× 304 4.3× 129 1.8× 18 586
Aðalsteinn Sigurgeirsson Iceland 10 92 0.3× 71 0.4× 128 1.2× 82 1.2× 118 1.7× 27 348
Toshiya Kishiro Japan 8 60 0.2× 182 1.0× 107 1.0× 109 1.5× 45 0.6× 15 449
Jan Smyčka Czechia 10 147 0.5× 43 0.2× 81 0.8× 47 0.7× 156 2.2× 18 326
Yan Hao China 11 102 0.3× 103 0.6× 41 0.4× 180 2.5× 37 0.5× 22 424
Monika Struebig United Kingdom 7 95 0.3× 145 0.8× 68 0.7× 54 0.8× 48 0.7× 9 324
Geoff Williams Australia 11 264 0.8× 42 0.2× 90 0.9× 47 0.7× 113 1.6× 30 378
Thomas J. Creedy United Kingdom 10 156 0.5× 131 0.7× 65 0.6× 70 1.0× 98 1.4× 22 458
Andreas Prinzing France 3 287 0.9× 28 0.1× 107 1.0× 48 0.7× 316 4.5× 3 440

Countries citing papers authored by Takeshi Ohsawa

Since Specialization
Citations

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

Fields of papers citing papers by Takeshi Ohsawa

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Takeshi Ohsawa

This figure shows the co-authorship network connecting the top 25 collaborators of Takeshi Ohsawa. A scholar is included among the top collaborators of Takeshi Ohsawa 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 Takeshi Ohsawa. Takeshi Ohsawa 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.
Yamada, Toshihiro, Kazuo Terada, Takeshi Ohsawa, et al.. (2019). Sueria laxinervis, a new fossil species of Cycadales from the Upper Cretaceous Quiriquina Formation in Cocholgüe, Bíobío Region, Chile. Phytotaxa. 402(2). 1 indexed citations
3.
4.
Ohsawa, Takeshi, et al.. (2017). A new species of seagrass-boring Limnoria (Limnoriidae, Isopoda, Crustacea) from Japan. Zootaxa. 4232(2). zootaxa.4232.2.8–zootaxa.4232.2.8. 3 indexed citations
5.
Iwasaki, Takaya, Shohei Takeda, Takeshi Ohsawa, et al.. (2013). Extensive selfing in an endangered population of Pinus parviflora var. parviflora (Pinaceae) in the Boso Hills, Japan. Tree Genetics & Genomes. 9(3). 693–705. 7 indexed citations
6.
Nishida, Harufumi, et al.. (2012). 358 3D reconstruction of a coleopteran pupa in a reproductive organ of extinct gymnosperm from the Upper Cretaceous of Hokkaido, Japan. 58. 163. 1 indexed citations
7.
Kato, Toshihide, et al.. (2009). Incongruence among mitochondrial, chloroplast and nuclear gene trees in Pinus subgenus Strobus (Pinaceae). Journal of Plant Research. 122(5). 509–521. 47 indexed citations
8.
Suyama, Yoshihisa, et al.. (2008). Airborne‐pollen pool and mating pattern in a hybrid zone betweenPinus pumilaandP. parvifloravar.pentaphylla. Molecular Ecology. 17(23). 5092–5103. 20 indexed citations
9.
Ebihara, Atsushi, Kunio Iwatsuki, Takeshi Ohsawa, & Motomi Itô. (2003). Hymenophyllum paniense (Hymenophyllaceae), A New Species of Filmy Fern from New Caledonia. Systematic Botany. 28(2). 228–235. 31 indexed citations
10.
Ogihara, Yasunari & Takeshi Ohsawa. (2002). Molecular analysis of the complete set of length mutations found in the plastomes ofTriticumAegilopsspecies. Genome. 45(5). 956–962. 5 indexed citations
11.
Ohsawa, Takeshi, et al.. (1995). 急斜面の浅土層に生育する落葉樹のEuptelea polyandra(キンポウゲ目)の芽生えの適応性意義. Journal of Plant Research. 108(1091). 377–386. 1 indexed citations
12.
Ohsawa, Takeshi, et al.. (1995). Adaptive significance of sprouting of Euptelea polyandra [Eupteleaceae, Magnoliales], a deciduous tree growing on steep slopes with shallow soil. 9 indexed citations
13.
Ohsawa, Takeshi, et al.. (1995). Tsuga shimokawaensis, a new species of permineralized conifer leaves from the Middle Miocene Shimokawa Group, Hokkaido, Japan. Journal of Plant Research. 108(4). 417–428. 13 indexed citations
14.
Ohsawa, Takeshi. (1994). Anatomy and relationships of petrified seed cones of the Cupressaceae, Taxodiaceae, and Sciadopityaceae. Journal of Plant Research. 107(4). 503–512. 21 indexed citations
15.
Iriyama, Keiji, et al.. (1994). Results of combined resection of invaded organs in patients with potentially curable, advanced gastric cancer.. PubMed. 160(1). 27–30. 13 indexed citations
16.
Ohsawa, Takeshi, Makoto Nishida, & Harufumi Nishida. (1992). Structure and Affinities of the Petrified Plants from the Cretaceous of Nurthern Japan and Saghalien. XII. Obirastrobus gen. nov., Petrified Pinaceous Cones from the Upper Cretaceous of Hokkaido. Journal of Plant Research. 105(1079). 461–484. 4 indexed citations
17.
Yoshida, Hiroshi, Ken‐ichi Michi, & Takeshi Ohsawa. (1990). Prosthetic treatment for speech disorders due to surgically acquired maxillary defects. Journal of Oral Rehabilitation. 17(6). 565–571. 26 indexed citations
18.
Nishida, Makoto, Takeshi Ohsawa, & Harufumi Nishida. (1990). Anatomy and affinities of the petrified plants from the teriary of Chile (VI). Journal of Plant Research. 103(3). 255–268. 17 indexed citations
19.
Nishida, Makoto, Harufumi Nishida, & Takeshi Ohsawa. (1989). Comparison of the petrified woods from the Cretaceous and Tertiary of Antarctica and Patagonia. Institutional Repository National Institute of Polar Research (National Institute of Polar Research (Japan)). 2(2). 198–212. 24 indexed citations
20.
Hasegawa, Masaru, et al.. (1984). [The marsupialization of cystic tumors. Experiences in the treatment of 2 cases of ameloblastoma of the mandible].. PubMed. 3(2). 241–9. 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Conny Thiel‐Egenter Breakdown of academic impact, for papers by Kyoko Aoki Breakdown of academic impact, for papers by Aðalsteinn Sigurgeirsson Breakdown of academic impact, for papers by Toshiya Kishiro Breakdown of academic impact, for papers by Jan Smyčka Breakdown of academic impact, for papers by Yan Hao Breakdown of academic impact, for papers by Monika Struebig Breakdown of academic impact, for papers by Geoff Williams Breakdown of academic impact, for papers by Thomas J. Creedy Breakdown of academic impact, for papers by Andreas Prinzing
Rankless by CCL
2026