Toshiya Okamura

429 total citations
24 papers, 365 citations indexed

About

Toshiya Okamura is a scholar working on Molecular Biology, Cancer Research and Oncology. According to data from OpenAlex, Toshiya Okamura has authored 24 papers receiving a total of 365 indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Molecular Biology, 9 papers in Cancer Research and 4 papers in Oncology. Recurrent topics in Toshiya Okamura's work include Carcinogens and Genotoxicity Assessment (8 papers), Genomics, phytochemicals, and oxidative stress (7 papers) and Glutathione Transferases and Polymorphisms (5 papers). Toshiya Okamura is often cited by papers focused on Carcinogens and Genotoxicity Assessment (8 papers), Genomics, phytochemicals, and oxidative stress (7 papers) and Glutathione Transferases and Polymorphisms (5 papers). Toshiya Okamura collaborates with scholars based in Japan, Sri Lanka and Singapore. Toshiya Okamura's co-authors include Takashi Umemura, Akiyoshi Nishikawa, Kunitoshi Mitsumori, Tomoki Inoue, Yasuaki Dewa, Meilan Jin, Yukie Saegusa, Jihei Nishimura, Masako Muguruma and Takehiko Nohmi and has published in prestigious journals such as Journal of Agricultural and Food Chemistry, Food and Chemical Toxicology and Toxicological Sciences.

In The Last Decade

Toshiya Okamura

24 papers receiving 352 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Toshiya Okamura Japan	12	191	98	58	52	42	24	365
Yuichi Kuroiwa Japan	14	298 1.6×	129 1.3×	55 0.9×	63 1.2×	52 1.2×	22	493
Muhammed F. Hashim United States	11	366 1.9×	122 1.2×	54 0.9×	49 0.9×	37 0.9×	14	501
Jihei Nishimura Japan	13	275 1.4×	94 1.0×	94 1.6×	36 0.7×	37 0.9×	30	435
Yasuaki Dewa Japan	14	359 1.9×	120 1.2×	110 1.9×	46 0.9×	48 1.1×	34	547
K. Kolanjiappan India	8	240 1.3×	68 0.7×	36 0.6×	62 1.2×	44 1.0×	8	536
Emiko Asakawa Japan	11	188 1.0×	133 1.4×	30 0.5×	40 0.8×	33 0.8×	18	392
Rosa Huang Liu Taiwan	16	297 1.6×	36 0.4×	92 1.6×	63 1.2×	26 0.6×	27	635
Nobuyuki Ito Japan	11	178 0.9×	177 1.8×	29 0.5×	50 1.0×	37 0.9×	14	423
Tokutaro Miki Japan	12	157 0.8×	69 0.7×	40 0.7×	53 1.0×	115 2.7×	18	409
P. Uma Devi India	14	188 1.0×	138 1.4×	28 0.5×	96 1.8×	64 1.5×	22	496

Countries citing papers authored by Toshiya Okamura

Since Specialization

Citations

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

Fields of papers citing papers by Toshiya Okamura

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Toshiya Okamura

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

All Works

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20 of 20 papers shown

Okano, Hiromu, Toshiya Okamura, Yasunori Takahashi, et al.. (2021). A 28-day repeated oral dose toxicity study of enniatin complex in mice. The Journal of Toxicological Sciences. 46(4). 157–165. 3 indexed citations

Aoki, Mami, Masahiro Mochizuki, Toshiya Okamura, et al.. (2014). A 4-week oral toxicity study of L-alanine in rats with a recovery period of 2 weeks. Fundamental Toxicological Sciences. 1(2). 63–72. 4 indexed citations

Okamura, Toshiya, Takashi Umemura, Tomoki Inoue, et al.. (2013). Chemopreventive Effects of 4-Methylthio-3-butenyl Isothiocyanate (Raphasatin) but Not Curcumin against Pancreatic Carcinogenesis in Hamsters. Journal of Agricultural and Food Chemistry. 61(9). 2103–2108. 19 indexed citations

Ogawa, Kumiko, Takashi Umemura, Daisuke Hibi, et al.. (2011). Uterine Carcinosarcoma in a 2-year-old Female Wistar Hannover GALAS Rat. Journal of Toxicologic Pathology. 24(1). 63–67. 1 indexed citations

Okamura, Toshiya, Tatsuya Ogawa, Jun’ichi Kobayashi, et al.. (2011). Background Data for General Toxicology Parameters in RccHanTM:WIST Rats at 8, 10, 19 and 32 Weeks of Age. Journal of Toxicologic Pathology. 24(4). 195–205. 29 indexed citations

Umemura, Takashi, Yuta Suzuki, Daisuke Hibi, et al.. (2010). Oxidative DNA damage and reporter gene mutation in the livers of gpt delta rats given non‐genotoxic hepatocarcinogens with cytochrome P450‐inducible potency. Cancer Science. 101(12). 2525–2530. 15 indexed citations

Ishii, Yuji, et al.. (2009). Dietary catechol causes increased oxidative DNA damage in the livers of mice treated with acetaminophen. Toxicology. 263(2-3). 93–99. 6 indexed citations

Umemura, Takashi, Aki Kijima, Tomoki Inoue, et al.. (2009). Simultaneous induction of non-neoplastic and neoplastic lesions with highly proliferative hepatocytes following dietary exposure of rats to tocotrienol for 2 years. Archives of Toxicology. 83(11). 1021–1030. 3 indexed citations

Ishii, Yuji, Toshiya Okamura, Tomoki Inoue, et al.. (2009). Chemical Structure Determination of DNA Bases Modified by Active Metabolites of Lucidin-3-O-primeveroside. Chemical Research in Toxicology. 23(1). 134–141. 22 indexed citations

10.

Nishimura, Jihei, Yasuaki Dewa, Toshiya Okamura, et al.. (2008). Role of Nrf2 and Oxidative stress on Fenofibrate-Induced Hepatocarcinogenesis in Rats. Toxicological Sciences. 106(2). 339–349. 12 indexed citations

11.

Umemura, Takashi, Tomoki Inoue, Toshiya Okamura, et al.. (2008). Induction of characteristic hepatocyte proliferative lesion with dietary exposure of Wistar Hannover rats to tocotrienol for 1 year. Toxicology. 250(2-3). 143–150. 23 indexed citations

12.

Dewa, Yasuaki, Jihei Nishimura, Masako Muguruma, et al.. (2008). Involvement of oxidative stress in hepatocellular tumor-promoting activity of oxfendazole in rats. Archives of Toxicology. 83(5). 503–511. 33 indexed citations

13.

Umemura, Takashi, Aki Kijima, Toshiya Okamura, et al.. (2008). Possible participation of oxidative stress in causation of cell proliferation and in vivo mutagenicity in kidneys of gpt delta rats treated with potassium bromate. Toxicology. 257(1-2). 46–52. 34 indexed citations

14.

Nishimura, Jihei, Yasuaki Dewa, Toshiya Okamura, et al.. (2008). Possible involvement of oxidative stress in fenofibrate-induced hepatocarcinogenesis in rats. Archives of Toxicology. 82(9). 641–654. 38 indexed citations

15.

Kuroiwa, Yuichi, Masami Yamada, Keiko Matsui, et al.. (2008). Combined Ascorbic Acid and Sodium Nitrite Treatment Induces Oxidative DNA Damage-Associated Mutagenicity In Vitro, but Lacks Initiation Activity in Rat Forestomach Epithelium. Toxicological Sciences. 104(2). 274–282. 8 indexed citations

16.

Umemura, Takashi, Aki Kijima, Yuji Ishii, et al.. (2008). Lack of promotion activity of diacylglycerol oil on 4-nitroquinoline 1-oxide induced carcinogenesis in the oral cavity of SD rats. Food and Chemical Toxicology. 46(9). 3206–3212. 2 indexed citations

17.

Dewa, Yasuaki, Jihei Nishimura, Masako Muguruma, et al.. (2007). β-Naphthoflavone enhances oxidative stress responses and the induction of preneoplastic lesions in a diethylnitrosamine-initiated hepatocarcinogenesis model in partially hepatectomized rats. Toxicology. 244(2-3). 179–189. 49 indexed citations

18.

Umemura, Takashi, Yuichi Kuroiwa, Toshiya Okamura, et al.. (2007). Detection of oxidative DNA damage, cell proliferation and in vivo mutagenicity induced by dicyclanil, a non-genotoxic carcinogen, using gpt delta mice. Mutation Research/Genetic Toxicology and Environmental Mutagenesis. 633(1). 46–54. 24 indexed citations

19.

Kuroiwa, Yuichi, Toshiya Okamura, Yuji Ishii, et al.. (2007). Enhancement of esophageal carcinogenesis in acid reflux model rats treated with ascorbic acid and sodium nitrite in combination with or without initiation. Cancer Science. 99(1). 7–13. 10 indexed citations

20.

Ishii, Yuji, Toshiya Okamura, Takashi Umemura, et al.. (2006). Development of quantitative analysis of 8-nitroguanine concomitant with 8-hydroxydeoxyguanosine formation by liquid chromatography with mass spectrometry and glyoxal derivatization. Journal of Pharmaceutical and Biomedical Analysis. 43(5). 1737–1743. 13 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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