Ryo Takakura

791 total citations
18 papers, 612 citations indexed

About

Ryo Takakura is a scholar working on Public Health, Environmental and Occupational Health, Reproductive Medicine and Molecular Biology. According to data from OpenAlex, Ryo Takakura has authored 18 papers receiving a total of 612 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Public Health, Environmental and Occupational Health, 7 papers in Reproductive Medicine and 4 papers in Molecular Biology. Recurrent topics in Ryo Takakura's work include Reproductive Biology and Fertility (11 papers), Ovarian function and disorders (5 papers) and Animal Genetics and Reproduction (4 papers). Ryo Takakura is often cited by papers focused on Reproductive Biology and Fertility (11 papers), Ovarian function and disorders (5 papers) and Animal Genetics and Reproduction (4 papers). Ryo Takakura collaborates with scholars based in Japan, Bulgaria and China. Ryo Takakura's co-authors include Shu Hashimoto, Naojiro Minami, Masayasu Yamada, Akemi Takenaka, Osamu Ishikawa, Toru Ishida, Sachiko Tanaka, Koichi Tatsumi, Akihiko Nakaizumi and Hiroyasu Iishi and has published in prestigious journals such as Gut, Biology of Reproduction and Theriogenology.

In The Last Decade

Ryo Takakura

16 papers receiving 587 citations

Peers

Ryo Takakura

PHEOH

ONCOL

SURGE

Isabelle Marcillac France

Mousa Shamonki United States

Hanène Landolsi Tunisia

T. Arthur Chang United States

K. G. Ober Germany

P. Ide Belgium

Yasukazu Sagawa Japan

D. Tran France

P. A. Brioschi Switzerland

Xiuxiu Xu China

Isabelle Marcillac France

Ryo Takakura

151 ×0.5

PHEOH

42 ×0.2

ONCOL

52 ×0.3

SURGE

230 ×1.2

108 ×0.6

Citations per year, relative to Ryo Takakura Ryo Takakura (= 1×) peers Isabelle Marcillac

Countries citing papers authored by Ryo Takakura

Since Specialization

Citations

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

Fields of papers citing papers by Ryo Takakura

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ryo Takakura

This figure shows the co-authorship network connecting the top 25 collaborators of Ryo Takakura. A scholar is included among the top collaborators of Ryo Takakura 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 Ryo Takakura. Ryo Takakura is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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18 of 18 papers shown

Takakura, Ryo, et al.. (2025). First report of metabolic complete response in hepatic sarcomatoid carcinoma achieved with carbon-ion radiotherapy. Clinical Journal of Gastroenterology. 18(5). 879–885.

Takakura, Ryo. (2024). Optimal CHSH values for regular polygon theories in generalized probabilistic theories. Journal of Physics A Mathematical and Theoretical. 57(37). 375305–375305.

Takakura, Ryo. (2019). Entropy of mixing exists only for classical and quantum-like theories among the regular polygon theories. Journal of Physics A Mathematical and Theoretical. 52(46). 465302–465302. 4 indexed citations

Loukanov, Alexandrе, et al.. (2017). Monitoring and extraction of uranium in polluted acid mine drainage by super-paramagnetic nanoparticles coated with carbon nanodots. Journal of Radioanalytical and Nuclear Chemistry. 314(2). 1149–1159. 17 indexed citations

Ioka, Tatsuya, et al.. (2012). Safety and Effectiveness of Gemcitabine in 855 Patients with Pancreatic Cancer under Japanese Clinical Practice Based on Post-marketing Surveillance in Japan. Japanese Journal of Clinical Oncology. 43(2). 139–145. 4 indexed citations

Nakaizumi, Akihiko, Osamu Ishikawa, Hiroyasu Iishi, et al.. (2008). Development of ductal carcinoma of the pancreas during follow-up of branch duct intraductal papillary mucinous neoplasm of the pancreas. Gut. 57(11). 1561–1565. 226 indexed citations

Itagaki, Yasuharu, et al.. (2003). Effect of Polyethylene Glycol and Dimethyl Sulfoxide on the Fusion of Bovine Nuclear Transfer Using Mammary Gland Epithelial Cells. Cloning and Stem Cells. 5(1). 43–49. 3 indexed citations

Hashimoto, Shu, Kouji Kimura, Hisataka Iwata, & Ryo Takakura. (2003). Oocyte Transport: Developmental Competence of Bovine Oocytes Arrested at Germinal Vesicle Stage by Cycloheximide under Air.. Journal of Reproduction and Development. 49(1). 61–66. 12 indexed citations

Itagaki, Yasuharu, et al.. (2003). In vitro development of bovine nuclear transfer embryos reconstructed with mammary gland epithelial cells at different passages. Animal Science Journal. 74(5). 363–368. 4 indexed citations

10.

Hashimoto, Shu, Naojiro Minami, Ryo Takakura, & Hiroshi Imai. (2002). Bovine Immature Oocytes Acquire Developmental Competence During Meiotic Arrest In Vitro1. Biology of Reproduction. 66(6). 1696–1701. 82 indexed citations

11.

Kishi, Michio J., Ryo Takakura, Masanori Imamura, et al.. (2000). Nuclear transfer in cattle using colostrum-derived mammary gland epithelial cells and ear-derived fibroblast cells. Theriogenology. 54(5). 675–684. 40 indexed citations

12.

Hashimoto, Shu, et al.. (2000). Low oxygen tension during in vitro maturation is beneficial for supporting the subsequent development of bovine cumulus-oocyte complexes. Molecular Reproduction and Development. 57(4). 353–360. 129 indexed citations

13.

Hashimoto, Shu, Ryo Takakura, Michio J. Kishi, et al.. (1999). Ultrasound-guided follicle aspiration: The collection of bovine cumulus-oocyte complexes from ovaries of slaughtered or live cows. Theriogenology. 51(4). 757–765. 33 indexed citations

14.

Hashimoto, Shu, Ryo Takakura, Naojiro Minami, & Masayasu Yamada. (1999). Ultrasound-guided follicle aspiration: Effect of the frequency of a linear transvaginal probe on the collection of bovine oocytes. Theriogenology. 52(1). 131–138. 13 indexed citations

15.

Hashimoto, Shunsuke, Ryo Takakura, Naojiro Minami, & Masayasu Yamada. (1999). Ultrasound-guided follicle aspiration: Effect of the frequency of a linear transvaginal probe on the collection of bovine oocytes. Theriogenology. 52(1). 139–152. 2 indexed citations

16.

Hashimoto, Shu, Ryo Takakura, Michio J. Kishi, et al.. (1998). Effects of aspiration vacuum and needle diameter on the recovery rate of bovine cumulus-oocyte-complexes by transvaginal aspiration. Theriogenology. 49(1). 401–401. 3 indexed citations

17.

Utsumi, K., et al.. (1993). Embryo sex selection by a rat male‐specific antibody and the cytogenetic and developmental confirmation in cattle embryos. Molecular Reproduction and Development. 34(1). 25–32. 15 indexed citations

18.

Saeki, Kazuhiro, et al.. (1989). Production of bovine identical twins via transfer of demi-embryos without zonae pellucidae. Theriogenology. 32(2). 211–220. 25 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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