Ken Sawai

1.9k citations

61 papers · 1.5k indexed · h-index 21

Impact in

Reproductive Medicine top 5%
- Sperm and Testicular Function
Public Health, Environmental and Occupational Health top 2%
- Reproductive Biology and Fertility

Papers in

Reproductive Medicine 12
- Hypothalamic control of reproductive hormones 6
Agronomy and Crop Science 12
- Reproductive Physiology in Livestock 11

Co-authors: Hiroki Hirayama Tsutomu HASHIZUME Akira MINAMIHASHI Satoru Moriyasu Soichi KAGEYAMA Takashi Fujii Koji Niwa Sadao Onoe
Journals: Journal of Reproduction and Development (26 papers)Animal Science Journal (9 papers)Cellular Reprogramming (5 papers)Theriogenology (4 papers)Biology of Reproduction (3 papers)
Partner nations: Japan Hungary South Korea

In The Last Decade

Ken Sawai

61 papers receiving 1.5k citations

Peers

Countries citing papers authored by Ken Sawai

Since Specialization

Citations

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

Fields of papers citing papers by Ken Sawai

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authors

The 25 scholars most cited alongside Ken Sawai, 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 Ken Sawai Line = papers co-authored together Ken Sawai links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Evaluation of bovine embryo quality based on gene expression profiling using whole-transcriptome amplification Journal of Reproduction and Development ·Takashi Fujii, T Mukai, Shoji HASEGAWA, Toh-ichi HIRATA, Ken Sawai	2024	1
2	Effect of Downregulating the Hippo Pathway Members YAP1 and LATS2 Transcripts on Early Development and Gene Expression Involved in Differentiation in Porcine Embryos Cellular Reprogramming ·Natsuko Emura, Yuriko Saito, Ruri Miura, Ken Sawai	2020	13
3	The Necessity of OCT-4 and CDX2 for Early Development and Gene Expression Involved in Differentiation of Inner Cell Mass and Trophectoderm Lineages in Bovine Embryos Cellular Reprogramming ·Nobuyuki Sakurai, Kazuki Takahashi, Natsuko Emura, Takashi Fujii, Hiroki Hirayama, Soichi KAGEYAMA, Tsutomu HASHIZUME, Ken Sawai	2016	43
4	Inhibition of neuraminidase by Ganoderma triterpenoids and implications for neuraminidase inhibitor design Scientific Reports ·Qinchang Zhu, Tran Hai Bang, Koichiro Ohnuki, Takashi Sawai, Ken Sawai, Kuniyoshi Shimizu	2015	52
5	Localization of TGF-β and TGF-β receptor in bovine term placentome and expression differences between spontaneous and induced parturition Placenta ·Hiroki Hirayama, Keisuke Koyama, Ken Sawai, Takashi Fujii, Akira Naito, Shigeo Fukuda, Soichi KAGEYAMA	2015	10
6	Transcript abundance and apoptosis in day-7 porcine blastocyst cultured with exogenous insulin-like growth factor-I Reproductive Biology ·Marta Wasielak, Takashi Fujii, T. Ohsaki, Tsutomu HASHIZUME, M. Bogacki, Ken Sawai	2013	8
7	Effects of Downregulating Oct-4 Transcript by RNA Interference on Early Development of Porcine Embryos Journal of Reproduction and Development ·Nobuyuki Sakurai, Takashi Fujii, Tsutomu HASHIZUME, Ken Sawai	2013	16
8	Impeding Xist Expression from the Active X Chromosome Improves Mouse Somatic Cell Nuclear Transfer Science ·Kimiko Inoue, Takashi Kohda, Michihiko Sugimoto, Takashi Sado, Narumi Ogonuki, Shogo Matoba, Hirosuke Shiura, Rieko Ikeda, Keiji Mochida, Takashi Fujii, Ken Sawai, Arie P. Otte, Xiuchun Tian, Xiangzhong Yang, Fumitoshi Ishino, Kuniya Abe, Atsuo Ogura	2010	188
9	Aberrant Expression Patterns of Genes Involved in Segregation of Inner Cell Mass and Trophectoderm Lineages in Bovine Embryos Derived from Somatic Cell Nuclear Transfer Cellular Reprogramming ·Takashi Fujii, Satoru Moriyasu, Hiroki Hirayama, Tsutomu HASHIZUME, Ken Sawai	2010	36
10	Changes in the DNA Methylation Status of Bovine Embryos from the Blastocyst to Elongated Stage Derived from Somatic Cell Nuclear Transfer Cellular Reprogramming ·Ken Sawai, Masashi Takahashi, Satoru Moriyasu, Hiroki Hirayama, Akira MINAMIHASHI, Tsutomu HASHIZUME, Sadao Onoe	2010	11
11	Changes in the DNA Methylation Status of Bovine Embryos from the Blastocyst to Elongated Stage Derived from Somatic Cell Nuclear Transfer Cellular Reprogramming ·Ken Sawai, Masashi Takahashi, Satoru Moriyasu, Hiroki Hirayama, Akira MINAMIHASHI, Tsutomu HASHIZUME, Sadao Onoe	2009	18
12	Excess estrogen sulfoconjugation as the possible cause for a poor sign of parturition in pregnant cows carrying somatic cell clone fetuses Reproduction ·Hiroki Hirayama, Ken Sawai, Satoru Moriyasu, Muneyuki Hirayama, Yuji Goto, Etsushi KANEKO, Akio Miyamoto, Koichi Ushizawa, Toru Takahashi, Akira MINAMIHASHI	2008	13
13	Derivation, Maintenance, and Induction of the Differentiation In Vitro of Equine Embryonic Stem Cells Humana Press eBooks ·Ken Sawai, Arika Minamihashi, Hideyo Ugai, Takehide Murata, Kazunari K. Yokoyama, Shigeo Saito	2006	17
14	Rapid sex chromosomal chimerism analysis in heterosexual twin female calves by Loop-mediated Isothermal Amplification Animal Reproduction Science ·Hiroki Hirayama, Seiji Katagiri, Soichi KAGEYAMA, Akira MINAMIHASHI, Satoru Moriyasu, Ken Sawai, Sadao Onoe, Yoshiyuki Takahashi	2006	16
15	Analysis of mRNA Transcripts for Insulin-Like Growth Factor Receptors and Binding Proteins in Bovine Embryos Derived from Somatic Cell Nuclear Transfer Cloning and Stem Cells ·Ken Sawai, Soichi KAGEYAMA, Satoru Moriyasu, Hiroki Hirayama, Akira MINAMIHASHI, Sadao Onoe	2005	28
16	Interspecies Somatic Cell Nuclear Transfer for In Vitro Production of Antarctic Minke Whale (Balaenoptera bonaerensis) Embryos Cloning and Stem Cells ·Sachiko Ikumi, Ken Sawai, Yurika Takeuchi, Hiroshi Iwayama, Hajime Ishikawa, Seiji Ohsumi, Yutaka Fukui	2004	27
17	Rapid sexing of bovine preimplantation embryos using loop-mediated isothermal amplification Theriogenology ·Hiroki Hirayama, Soichi KAGEYAMA, Satoru Moriyasu, Ken Sawai, Sadao Onoe, Yoshiyuki Takahashi, Seiji Katagiri, Keiko Toen, Keiko Watanabe, Tsugunori Notomi, H. Yamashina, S. Matsuzaki, Akira MINAMIHASHI	2004	68
18	Establishment of a specific radioimmunoassay for bovine interferon τ Theriogenology ·Hitomi Takahashi, Masashi Takahashi, Hidekazu Nagaya, Makoto Hirako, Ken Sawai, Akira MINAMIHASHI, Shigeki Inumaru, Yuichi Yokomizo, M. Geshi, Akira Okano, Kiyoshi Okuda	2004	9
19	Generation of cloned calves and transgenic chimeric embryos from bovine embryonic stem-like cells Biochemical and Biophysical Research Communications ·Shigeo Saito, Ken Sawai, Hideyo Ugai, Satoru Moriyasu, Akira MINAMIHASHI, Yusuke Yamamoto, Hiroki Hirayama, Soichi KAGEYAMA, Jianzhi Pan, Takehide Murata, Yoshiro Kobayashi, Yuichi Obata, Kazunari K. Yokoyama	2003	94
20	Amino Acids in Maturation Medium and Presence of Cumulus Cells at Fertilization Promote Male Pronuclear Formation in Porcine Oocytes Matured and Penetrated in Vitro1 Biology of Reproduction ·Hakhyun Ka, Ken Sawai, Weihua Wang, Kyung-Soon Im, Koji Niwa	1997	60

About Ken Sawai

Ken Sawai is a scholar working on Reproductive Medicine, Agronomy and Crop Science, Public Health, Environmental and Occupational Health, Genetics and Equine, having authored 61 papers that have together received 1.5k indexed citations. Recurring topics across this work include Reproductive Biology and Fertility (31 papers), Pluripotent Stem Cells Research (26 papers), Animal Genetics and Reproduction (18 papers), Renal and related cancers (11 papers), Reproductive Physiology in Livestock (11 papers), CRISPR and Genetic Engineering (8 papers), Hypothalamic control of reproductive hormones (6 papers) and Epigenetics and DNA Methylation (5 papers). The work is most often cited by research in Reproductive Medicine (241 citations), Public Health, Environmental and Occupational Health (701 citations), Genetics (530 citations), Agronomy and Crop Science (158 citations) and Molecular Biology (1.0k citations). Ken Sawai has collaborated with scholars based in Japan, Hungary and South Korea. Frequent co-authors include Hiroki Hirayama, Tsutomu HASHIZUME, Akira MINAMIHASHI, Satoru Moriyasu, Soichi KAGEYAMA, Takashi Fujii, Koji Niwa, Sadao Onoe, Nobuyuki Sakurai and Yutaka Fukui. Their work appears in journals such as Journal of Reproduction and Development, Animal Science Journal, Cellular Reprogramming, Theriogenology and Biology of Reproduction.

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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