Hiroki Hirayama

1.2k total citations
66 papers, 942 citations indexed

About

Hiroki Hirayama is a scholar working on Molecular Biology, Public Health, Environmental and Occupational Health and Genetics. According to data from OpenAlex, Hiroki Hirayama has authored 66 papers receiving a total of 942 indexed citations (citations by other indexed papers that have themselves been cited), including 30 papers in Molecular Biology, 21 papers in Public Health, Environmental and Occupational Health and 21 papers in Genetics. Recurrent topics in Hiroki Hirayama's work include Reproductive Biology and Fertility (21 papers), Reproductive Physiology in Livestock (15 papers) and Animal Genetics and Reproduction (13 papers). Hiroki Hirayama is often cited by papers focused on Reproductive Biology and Fertility (21 papers), Reproductive Physiology in Livestock (15 papers) and Animal Genetics and Reproduction (13 papers). Hiroki Hirayama collaborates with scholars based in Japan, Canada and South Korea. Hiroki Hirayama's co-authors include Ken Sawai, Soichi KAGEYAMA, Satoru Moriyasu, Akira MINAMIHASHI, K. Sandy Pang, Sadao Onoe, Tsutomu HASHIZUME, Takashi Fujii, Akira Naito and Yasuji Kasuya and has published in prestigious journals such as Diabetes, Biochemical and Biophysical Research Communications and Gene.

In The Last Decade

Hiroki Hirayama

65 papers receiving 902 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hiroki Hirayama Japan 18 459 343 324 181 90 66 942
H. Engelhardt Canada 16 287 0.6× 115 0.3× 152 0.5× 184 1.0× 87 1.0× 28 741
Christiane Neuhoff Germany 22 725 1.6× 438 1.3× 245 0.8× 247 1.4× 216 2.4× 52 1.4k
Raymond W. Wright United States 18 521 1.1× 1.1k 3.2× 634 2.0× 429 2.4× 511 5.7× 44 1.7k
Yao Bai China 14 215 0.5× 115 0.3× 73 0.2× 53 0.3× 98 1.1× 40 645
Dermot G. Morris Ireland 19 352 0.8× 420 1.2× 384 1.2× 573 3.2× 183 2.0× 28 1.2k
Weiheng Su China 18 388 0.8× 69 0.2× 114 0.4× 102 0.6× 34 0.4× 62 898
Sankar P. Chaki United States 18 260 0.6× 172 0.5× 80 0.2× 21 0.1× 293 3.3× 46 854
Pan Qin China 21 379 0.8× 45 0.1× 236 0.7× 26 0.1× 18 0.2× 42 1.6k
Isabel Barranco Spain 24 464 1.0× 808 2.4× 188 0.6× 224 1.2× 1.2k 12.8× 81 1.6k
K. Muralidhar India 12 126 0.3× 41 0.1× 68 0.2× 43 0.2× 82 0.9× 67 578

Countries citing papers authored by Hiroki Hirayama

Since Specialization
Citations

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

Fields of papers citing papers by Hiroki Hirayama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroki Hirayama

This figure shows the co-authorship network connecting the top 25 collaborators of Hiroki Hirayama. A scholar is included among the top collaborators of Hiroki Hirayama 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 Hiroki Hirayama. Hiroki Hirayama 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.
Koyama, Takeshi, et al.. (2024). Assessment of anti-Müllerian hormone levels as a reproductive indicator in Japanese Black cattle. Journal of Reproduction and Development. 70(6). 389–395.
2.
Nakamura, Tsukasa, et al.. (2023). Calving prediction with continuous measurement of subcutaneous tissue glucose concentration in pregnant cows. Theriogenology. 202. 119–124. 3 indexed citations
3.
Kawahara‐Miki, Ryouka, et al.. (2021). Impaired placentomal interferon signaling as the possible cause of retained fetal membrane in parturition-induced cows. Journal of Reproduction and Development. 68(1). 30–37. 1 indexed citations
4.
5.
Hirota, Noriko & Hiroki Hirayama. (2020). Variation of Pharmacokinetic Parameters for Original Products and Standard Products（Original Products）Used in Clinical Bioequivalence Studies of Generic Products：Montelukast Chewable Tablets as an Example. Rinsho yakuri/Japanese Journal of Clinical Pharmacology and Therapeutics. 51(1). 11–18. 1 indexed citations
6.
Fujii, Takashi, Akira Naito, Hiroki Hirayama, et al.. (2019). Potential of preimplantation genomic selection for carcass traits in Japanese Black cattle. Journal of Reproduction and Development. 65(3). 251–258. 15 indexed citations
7.
Fujii, Takashi, Hiroki Hirayama, Shigeo Fukuda, et al.. (2018). Expression and localization of aquaporins 3 and 7 in bull spermatozoa and their relevance to sperm motility after cryopreservation. Journal of Reproduction and Development. 64(4). 327–335. 20 indexed citations
8.
Sakurai, Nobuyuki, Kazuki Takahashi, Takashi Fujii, et al.. (2016). 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. 18(5). 309–318. 43 indexed citations
9.
Kobayashi, Yoshihiko, Yuki Yamamoto, Soichi KAGEYAMA, et al.. (2016). Regulation of bovine oviductal NO synthesis by follicular steroids and prostaglandins. Reproduction. 151(6). 577–587. 11 indexed citations
10.
Hirayama, Hiroki, Satoru Moriyasu, Soichi KAGEYAMA, et al.. (2014). Enhancement of maternal recognition of pregnancy with parthenogenetic embryos in bovine embryo transfer. Theriogenology. 81(8). 1108–1115. 17 indexed citations
11.
Hirayama, Hiroki, Soichi KAGEYAMA, Satoru Moriyasu, Ken Sawai, & Akira MINAMIHASHI. (2013). Embryo Sexing and Sex Chromosomal Chimerism Analysis by Loop-Mediated Isothermal Amplification in Cattle and Water Buffaloes. Journal of Reproduction and Development. 59(4). 321–326. 14 indexed citations
12.
Fujii, Takashi, Satoru Moriyasu, Hiroki Hirayama, Tsutomu HASHIZUME, & Ken Sawai. (2010). 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. 12(5). 617–625. 36 indexed citations
13.
Sawai, Ken, Masashi Takahashi, Satoru Moriyasu, et al.. (2010). Changes in the DNA Methylation Status of Bovine Embryos from the Blastocyst to Elongated Stage Derived from Somatic Cell Nuclear Transfer. Cellular Reprogramming. 12(1). 15–22. 11 indexed citations
14.
Sawai, Ken, Masashi Takahashi, Satoru Moriyasu, et al.. (2009). Changes in the DNA Methylation Status of Bovine Embryos from the Blastocyst to Elongated Stage Derived from Somatic Cell Nuclear Transfer. Cellular Reprogramming. 12(1). 15–22. 18 indexed citations
15.
Hirayama, Hiroki, Ken Sawai, Satoru Moriyasu, et al.. (2008). Excess estrogen sulfoconjugation as the possible cause for a poor sign of parturition in pregnant cows carrying somatic cell clone fetuses. Reproduction. 136(5). 639–647. 13 indexed citations
16.
Hirayama, Hiroki, Seiji Katagiri, Soichi KAGEYAMA, et al.. (2006). Rapid sex chromosomal chimerism analysis in heterosexual twin female calves by Loop-mediated Isothermal Amplification. Animal Reproduction Science. 101(1-2). 38–44. 16 indexed citations
17.
Sawai, Ken, Soichi KAGEYAMA, Satoru Moriyasu, et al.. (2005). 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. 7(3). 189–198. 28 indexed citations
18.
Hirayama, Hiroki, Soichi KAGEYAMA, Satoru Moriyasu, et al.. (2004). Rapid sexing of bovine preimplantation embryos using loop-mediated isothermal amplification. Theriogenology. 62(5). 887–896. 68 indexed citations
19.
Hirayama, Hiroki, et al.. (1990). Estimations of intestinal and liver first-pass metabolism in vivo. Studies on gentisamide conjugation in the rat.. Drug Metabolism and Disposition. 18(5). 588–594. 8 indexed citations
20.
Xu, Xin, Hiroki Hirayama, & K. Sandy Pang. (1989). First-pass metabolism of salicylamide. Studies in the once-through vascularly perfused rat intestine-liver preparation.. Drug Metabolism and Disposition. 17(5). 556–563. 24 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.

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