Kouichi Ohwada

1.8k total citations
62 papers, 1.4k citations indexed

About

Kouichi Ohwada is a scholar working on Ecology, Oceanography and Molecular Biology. According to data from OpenAlex, Kouichi Ohwada has authored 62 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 38 papers in Ecology, 19 papers in Oceanography and 16 papers in Molecular Biology. Recurrent topics in Kouichi Ohwada's work include Microbial Community Ecology and Physiology (36 papers), Genomics and Phylogenetic Studies (11 papers) and Marine and coastal ecosystems (11 papers). Kouichi Ohwada is often cited by papers focused on Microbial Community Ecology and Physiology (36 papers), Genomics and Phylogenetic Studies (11 papers) and Marine and coastal ecosystems (11 papers). Kouichi Ohwada collaborates with scholars based in Japan, United States and South Korea. Kouichi Ohwada's co-authors include Hidetoshi Urakawa, Kumiko Kita-Tsukamoto, Masahiko Nishimura, Kazuhiro Kogure, Rita R. Colwell, Paul Tabor, Tsutomu Yoshida, Koji Hamasaki, Minoru Wada and Usio Simidu and has published in prestigious journals such as Applied and Environmental Microbiology, Limnology and Oceanography and The ISME Journal.

In The Last Decade

Kouichi Ohwada

61 papers receiving 1.3k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Kouichi Ohwada Japan 23 669 493 338 269 240 62 1.4k
Juan Iriberri Spain 25 912 1.4× 399 0.8× 552 1.6× 183 0.7× 277 1.2× 50 1.5k
Shanta Nair India 19 689 1.0× 220 0.4× 494 1.5× 210 0.8× 234 1.0× 58 1.3k
Nobuo Taga Japan 23 1.1k 1.6× 689 1.4× 586 1.7× 289 1.1× 264 1.1× 64 2.1k
R.P. Herwig United States 11 607 0.9× 411 0.8× 103 0.3× 157 0.6× 472 2.0× 14 1.1k
Ryan Mueller United States 24 867 1.3× 885 1.8× 294 0.9× 405 1.5× 208 0.9× 60 2.2k
Choon Weng Lee Malaysia 17 419 0.6× 230 0.5× 367 1.1× 161 0.6× 269 1.1× 86 1.2k
Taek‐Kyun Lee South Korea 23 427 0.6× 622 1.3× 315 0.9× 219 0.8× 172 0.7× 127 2.2k
UL Zweifel Sweden 16 998 1.5× 490 1.0× 685 2.0× 171 0.6× 149 0.6× 22 1.5k
Vivia Bruni Italy 21 763 1.1× 407 0.8× 191 0.6× 156 0.6× 566 2.4× 38 1.5k
Andrew R. J. Curson United Kingdom 19 939 1.4× 475 1.0× 727 2.2× 137 0.5× 335 1.4× 27 1.9k

Countries citing papers authored by Kouichi Ohwada

Since Specialization
Citations

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

Fields of papers citing papers by Kouichi Ohwada

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kouichi Ohwada

This figure shows the co-authorship network connecting the top 25 collaborators of Kouichi Ohwada. A scholar is included among the top collaborators of Kouichi Ohwada 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 Kouichi Ohwada. Kouichi Ohwada 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.
Ohwada, Kouichi & Akira Yamawo. (2021). Functional roles of ants in a temperate grassland. Die Naturwissenschaften. 108(6). 56–56. 3 indexed citations
2.
Kunihiro, Tadao, Hiroyuki Takasu, Kyoko Kinoshita, et al.. (2011). Increase in Alphaproteobacteria in association with a polychaete, Capitella sp. I, in the organically enriched sediment. The ISME Journal. 5(11). 1818–1831. 29 indexed citations
3.
Ohwada, Kouichi, et al.. (2011). Growth dynamics of Chattonella antiqua in relation to nutrients in the Yatsushiro Sea. NIPPON SUISAN GAKKAISHI. 77(1). 40–52. 30 indexed citations
4.
Shikata, Tomoyuki, et al.. (2010). Effects of temperature, salinity and light irradiance on phytoplankton growth in the Yatsushiro Sea. NIPPON SUISAN GAKKAISHI. 76(1). 34–45. 30 indexed citations
5.
Miyazaki, Nobuyuki, Zafar Adeel, & Kouichi Ohwada. (2005). Mankind and the oceans. 3 indexed citations
6.
Yamamoto, Tomoko, Masahiro Nakaoka, Teruhisa Komatsu, Hiroshi Kawai, & Kouichi Ohwada. (2003). Impacts by heavy-oil spill from the Russian tanker Nakhodka on intertidal ecosystems: recovery of animal community. Marine Pollution Bulletin. 47(1-6). 91–98. 35 indexed citations
7.
Ohwada, Kouichi, Masahiko Nishimura, Minoru Wada, et al.. (2003). Study of the effect of water-soluble fractions of heavy-oil on coastal marine organisms using enclosed ecosystems, mesocosms. Marine Pollution Bulletin. 47(1-6). 78–84. 31 indexed citations
8.
Takada, Hideshige, Akihiro Yoshida, Akira Shibata, et al.. (2003). Study on the fate of petroleum-derived polycyclic aromatic hydrocarbons (PAHs) and the effect of chemical dispersant using an enclosed ecosystem, mesocosm. Marine Pollution Bulletin. 47(1-6). 105–113. 108 indexed citations
9.
Urakawa, Hidetoshi, Tsutomu Yoshida, Masahiko Nishimura, & Kouichi Ohwada. (2000). Characterization of depth‐related population variation in microbial communities of a coastal marine sediment using 16S rDNA‐based approaches and quinone profiling. Environmental Microbiology. 2(5). 542–554. 119 indexed citations
10.
11.
Nanba, Kenji, Kiyoshi Takeda, Takanori Higashihara, & Kouichi Ohwada. (1999). Distribution of Methanotrophic Bacteria in the Coastal Marine Sediments. Fisheries Science. 65(4). 531–536. 5 indexed citations
12.
Urakawa, Hidetoshi, et al.. (1998). A proposal to transferVibrio marinus(Russell 1891) to a new genusMoritellagen. nov. asMoritella marinacomb. nov.. FEMS Microbiology Letters. 165(2). 373–378. 46 indexed citations
13.
Urakawa, Hidetoshi, et al.. (1998). A New Approach to Separate the Genus Photobacterium from Vibrio with RFLP Patterns by HhaI Digestion of PCR-Amplified 16S rDNA. Current Microbiology. 36(3). 171–174. 17 indexed citations
14.
15.
Hamasaki, Koji, Kazuhiro Kogure, & Kouichi Ohwada. (1996). A biological method for the quantitative measurement of tetrodotoxin (TTX): Tissue culture bioassay in combination with a water-soluble tetrazolium salt. Toxicon. 34(4). 490–495. 64 indexed citations
16.
Hwang, Deng‐Fwu, Hsing-Chen Chen, Sen-Shyong Jeng, et al.. (1994). Microflora and Tetrodotoxin-producing Bacteria in the Lined Moon Shell <i>Natica lineata</i>. Fisheries Science. 60(5). 567–571. 23 indexed citations
17.
Nishimura, Masahiko, Kumiko Kita-Tsukamoto, Kazuhiro Kogure, & Kouichi Ohwada. (1992). Enumerations of Vibrio cholerae in Aquatic Environments by MPN-16S rRNA Hybridization Method.. 7(1). 43–46. 8 indexed citations
18.
Tabor, Paul, et al.. (1981). A pressure-retaining deep ocean sampler and transfer system for measurement of microbial activity in the deep sea. Microbial Ecology. 7(1). 51–65. 34 indexed citations
19.
Ohwada, Kouichi. (1975). Agar Plate Method for Detection and Enumeration of Alkylbenzenesulfonate-Degrading Microorganisms. Applied Microbiology. 29(1). 40–43. 4 indexed citations
20.
Ohwada, Kouichi, et al.. (1972). Seasonal Cycles of Vitamin B12, Thiamine and Biotin in the Surface Water of Lake Tsukui. NIPPON SUISAN GAKKAISHI. 38(8). 817–823. 6 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 Juan Iriberri Breakdown of academic impact, for papers by Shanta Nair Breakdown of academic impact, for papers by Nobuo Taga Breakdown of academic impact, for papers by R.P. Herwig Breakdown of academic impact, for papers by Ryan Mueller Breakdown of academic impact, for papers by Choon Weng Lee Breakdown of academic impact, for papers by Taek‐Kyun Lee Breakdown of academic impact, for papers by UL Zweifel Breakdown of academic impact, for papers by Vivia Bruni Breakdown of academic impact, for papers by Andrew R. J. Curson
Rankless by CCL
2026