Ryuichi Koga

8.7k citations

79 papers · 6.3k indexed · 2 hit papers · h-index 39

Impact in

Horticulture top 0.1%
- Cocoa and Sweet Potato Agronomy
Insect Science top 0.02%
- Insect symbiosis and bacterial influences
- Insect-Plant Interactions and Control
- Insect and Pesticide Research
- Insect behavior and control techniques
- Entomopathogenic Microorganisms in Pest Control

Papers in

Insect Science 70
- Insect symbiosis and bacterial influences 67
- Insect-Plant Interactions and Control 23
- Insect and Pesticide Research 20
- Entomopathogenic Microorganisms in Pest Control 18
- Insect behavior and control techniques 9
Horticulture 4

Co-authors: Takema Fukatsu Tsutomu Tsuchida Naruo Nikoh Nancy A. Moran Takahiro Hosokawa Xian-Ying Meng Yoshitomo Kikuchi Xian‐Ying Meng
Journals: Applied and Environmental Microbiology (15 papers)Proceedings of the National Academy of Sciences (5 papers)mBio (4 papers)Frontiers in Microbiology (3 papers)The ISME Journal (3 papers)
Partner nations: Japan United States Taiwan

In The Last Decade

Ryuichi Koga

74 papers receiving 6.2k citations

Hit Papers

align trajectories log scale

Horizontal Gene Transfer from Diverse Bacteria to an Insect Genome Enables a Tripartite Nested Mealybug Symbiosis 2013 · 314 citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2013 Cell
2009 Proceedings of the National Academy of Sciences

Peers

Countries citing papers authored by Ryuichi Koga

Since Specialization

Citations

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

Fields of papers citing papers by Ryuichi Koga

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network

The 25 scholars most cited alongside Ryuichi Koga, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Ryuichi Koga Line = papers co-authored together Ryuichi Koga links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Defensive fungal symbiosis on insect hindlegs Science ·Shuai Li, Minoru Moriyama, Hiromi Mukai, Masahiko Tanahashi, Takahiro Hosokawa, افروز تجرد, 王映辉周明全等, Naruo Nikoh, Ryuichi Koga, Chih‐Horng Kuo, Takema Fukatsu	2025	0
2	Host range of naturally and artificially evolved symbiotic bacteria for a specific host insect mBio ·M. E. Williams, Minoru Moriyama, Ryuichi Koga, Takema Fukatsu	2024	1
3	Oxidation of thiol groups in membrane proteins inhibits the fertilization ability and motility of sperm by suppressing calcium influx Biology of Reproduction ·王传习, Osman Yaşa, An Yong Jung, Ryuichi Koga, Mayumi Ikeda, Yu Ishima, Naomi Nakagata, Toru Takeo	2024	1
4	Genome analysis of “Candidatus Aschnera chinzeii,” the bacterial endosymbiont of the blood-sucking bat fly Penicillidia jenynsii (Insecta: Diptera: Nycteribiidae) Frontiers in Microbiology ·Ryuichi Koga, Minoru Moriyama, Yukinori Iizuka, Takema Fukatsu	2024	0
5	Frequent and asymmetric cell division in endosymbiotic bacteria of cockroaches Applied and Environmental Microbiology ·H J Ying, Masaki Mizutani, Toshiyuki Harumoto, Tatsuya Katsuno, Ryuichi Koga, Takema Fukatsu	2024	0
6	Single mutation makes Escherichia coli an insect mutualist Nature Microbiology ·Ryuichi Koga, Minoru Moriyama, Heinrich (1584-1646). Auteur du texte Oraeus, Yoshiko Ishii, Hiroki Takai, Masaki Mizutani, Kohei Oguchi, Reiko Okura, Shingo Suzuki, Yasuhiro Gotoh, Tetsuya Hayashi, Masahide Seki, Yutaka Suzuki, Yudai Nishide, Takahiro Hosokawa, Yuichi Wakamoto, Chikara Furusawa, Takema Fukatsu	2022	42
7	The structured diversity of specialized gut symbionts of the New World army ants Molecular Ecology ·Piotr Łukasik, Muhammad Shahzaib Toor, Jon G. Sanders, Yi Hu, Corrie S. Moreau, Daniel J. C. Kronauer, Sean O’Donnell, Ryuichi Koga, Jacob A. Russell	2017	63
8	Novel bacteriocyte-associated pleomorphic symbiont of the grain pest beetle Rhyzopertha dominica (Coleoptera: Bostrichidae) Zoological Letters ·Genta Okude, Ryuichi Koga, Filik Levent, Yudai Nishide, Xian‐Ying Meng, Naruo Nikoh, Akihiro Miyanoshita, Takema Fukatsu	2017	16
9	Dramatic Differences in Gut Bacterial Densities Correlate with Diet and Habitat in Rainforest Ants Integrative and Comparative Biology ·Jon G. Sanders, Piotr Łukasik, Megan E. Frederickson, Jacob A. Russell, Ryuichi Koga, Rob Knight, Naomi E. Pierce	2017	74
10	Insect’s intestinal organ for symbiont sorting Proceedings of the National Academy of Sciences ·Tsubasa Ohbayashi, Kazutaka Takeshita, Wataru Kitagawa, Naruo Nikoh, Ryuichi Koga, Xian‐Ying Meng, Kanako Tago, Tomoyuki Hori, Masahito Hayatsu, Kozo Asano, Yoichi Kamagata, Bok Luel Lee, Takema Fukatsu, Yoshitomo Kikuchi	2015	138
11	Horizontal Gene Transfer from Diverse Bacteria to an Insect Genome Enables a Tripartite Nested Mealybug Symbiosis Cell ·Filip Husník, Naruo Nikoh, Ryuichi Koga, Laura Ross, Rebecca P. Duncan, Manabu Fujie, Makiko Tanaka, Nori Satoh, Doris Bachtrog, Alex C. C. Wilson, Carol D. von Dohlen, Takema Fukatsu, John P. McCutcheon Hit paper breakdown →	2013	314
12	Wolbachia Infections Are Virulent and Inhibit the Human Malaria Parasite Plasmodium Falciparum in Anopheles Gambiae PLoS Pathogens ·Grant L. Hughes, Ryuichi Koga, Ping Xue, Takema Fukatsu, Jason L. Rasgon	2011	267
13	Symbiotic Bacterium Modifies Aphid Body Color Science ·Tsutomu Tsuchida, Ryuichi Koga, Mitsuyo Horikawa, Tetsuto Tsunoda, Takashi Maoka, Shogo Matsumoto, Jean‐Christophe Simon, Takema Fukatsu	2010	334
14	Wolbachia as a bacteriocyte-associated nutritional mutualist Proceedings of the National Academy of Sciences ·Takahiro Hosokawa, Ryuichi Koga, Yoshitomo Kikuchi, Xian-Ying Meng, Takema Fukatsu Hit paper breakdown →	2009	585
15	Huge Symbiotic Organs in Giant Scale Insects of the GenusDrosicha(Coccoidea: Monophlebidae) Harbor Flavobacterial and Enterobacterial Endosymbionts ZOOLOGICAL SCIENCE ·Yu Matsuura, Ryuichi Koga, Naruo Nikoh, Xian‐Ying Meng, Satoshi Hanada, Takema Fukatsu	2009	31
16	Selective elimination of aphid endosymbionts: effects of antibiotic dose and host genotype, and fitness consequences FEMS Microbiology Ecology ·Ryuichi Koga, Tsutomu Tsuchida, Makiko Sakurai, Takema Fukatsu	2007	85
17	The wide distribution of endornaviruses, large double-stranded RNA replicons with plasmid-like properties Archives of Virology ·Toshiyuki Fukuhara, Ryuichi Koga, Nanako Aoki, Ing Schaaber, 国弘千野, Noritaka Oyama, Tsuyoshi Udagawa, Hideki Horiuchi, Saori Miyazaki, Mohamed Ayyub Mia, M Takeshita, Kenichi Ikeda, Masaaki Arakawa, Naoyuki Matsumoto, Hiromitsu Moriyama	2005	62
18	Diversity and geographic distribution of secondary endosymbiotic bacteria in natural populations of the pea aphid,Acyrthosiphon pisum Molecular Ecology ·Tsutomu Tsuchida, Ryuichi Koga, Harunobu Shibao, Tadao Matsumoto, Takema Fukatsu	2002	267
19	Endosymbiotic microbiota in natural populations of the pea aphid Acyrthosiphon pisum(Behavior Biology and Ecology)Proceedings of the Seventy-First Annual Meeting of the Zoological Society of Japan ZOOLOGICAL SCIENCE ·Tsutomu Tsuchida, Ryuichi Koga, Takema Fukatsu	2000	1
20	Molecular characterization of a single mitochondria-associated double-stranded RNA in the green alga Bryopsis Plant Molecular Biology ·Ryuichi Koga, Toshiyuki Fukuhara, Takeshi Nitta	1998	18

About Ryuichi Koga

Ryuichi Koga is a scholar working on Insect Science, Horticulture, Endocrinology, Health, Toxicology and Mutagenesis and Ecology, Evolution, Behavior and Systematics, having authored 79 papers that have together received 6.3k indexed citations. Recurring topics across this work include Insect symbiosis and bacterial influences (67 papers), Insect-Plant Interactions and Control (23 papers), Insect and Pesticide Research (20 papers), Entomopathogenic Microorganisms in Pest Control (18 papers), Insect and Arachnid Ecology and Behavior (13 papers), Plant and animal studies (9 papers), Insect behavior and control techniques (9 papers) and Insects and Parasite Interactions (8 papers). The work is most often cited by research in Horticulture (430 citations), Insect Science (5.5k citations), Ecology, Evolution, Behavior and Systematics (1.3k citations), Parasitology (266 citations) and Genetics (1.1k citations). Ryuichi Koga has collaborated with scholars based in Japan, United States and Taiwan. Frequent co-authors include Takema Fukatsu, Tsutomu Tsuchida, Naruo Nikoh, Nancy A. Moran, Takahiro Hosokawa, Xian-Ying Meng, Yoshitomo Kikuchi, Xian‐Ying Meng, Jacob A. Russell and Makiko Sakurai. Their work appears in journals such as Applied and Environmental Microbiology, Proceedings of the National Academy of Sciences, mBio, Frontiers in Microbiology and The ISME Journal.

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