Masayoshi Oyama

1.6k total citations
73 papers, 1.4k citations indexed

About

Masayoshi Oyama is a scholar working on Molecular Biology, Plant Science and Geriatrics and Gerontology. According to data from OpenAlex, Masayoshi Oyama has authored 73 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 50 papers in Molecular Biology, 23 papers in Plant Science and 16 papers in Geriatrics and Gerontology. Recurrent topics in Masayoshi Oyama's work include Natural product bioactivities and synthesis (19 papers), Sirtuins and Resveratrol in Medicine (16 papers) and Bioactive natural compounds (14 papers). Masayoshi Oyama is often cited by papers focused on Natural product bioactivities and synthesis (19 papers), Sirtuins and Resveratrol in Medicine (16 papers) and Bioactive natural compounds (14 papers). Masayoshi Oyama collaborates with scholars based in Japan, Indonesia and China. Masayoshi Oyama's co-authors include Munekazu Iinuma, Tetsuro Ito, Naohito Abe, Ken‐ichi Nakashima, Yukihiro Akao, Dedy Darnaedi, Jin Murata, Kuo‐Hsiung Lee, Hui‐Kang Wang and Chang‐Qi Hu and has published in prestigious journals such as Journal of Agricultural and Food Chemistry, Food Chemistry and Biochemical and Biophysical Research Communications.

In The Last Decade

Masayoshi Oyama

70 papers receiving 1.3k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Masayoshi Oyama Japan	22	683	344	290	190	149	73	1.4k
Eun‐Jung Park United States	23	544 0.8×	343 1.0×	271 0.9×	198 1.0×	165 1.1×	53	1.5k
Michael Hawthorne United States	20	784 1.1×	278 0.8×	292 1.0×	117 0.6×	87 0.6×	27	1.4k
Mei‐Ing Chung Taiwan	23	583 0.9×	332 1.0×	344 1.2×	216 1.1×	65 0.4×	51	1.3k
Nobuyasu Matsuura Japan	26	958 1.4×	369 1.1×	336 1.2×	447 2.4×	74 0.5×	78	1.9k
Chang‐Qi Hu China	14	574 0.8×	202 0.6×	249 0.9×	139 0.7×	75 0.5×	30	916
Ren Xiang Tan China	21	689 1.0×	377 1.1×	303 1.0×	364 1.9×	42 0.3×	51	1.5k
Ajay Bommareddy United States	20	931 1.4×	202 0.6×	158 0.5×	106 0.6×	50 0.3×	39	1.4k
Do Thi Ha South Korea	20	549 0.8×	302 0.9×	157 0.5×	145 0.8×	92 0.6×	61	1.1k
Peiju Qiu China	22	716 1.0×	503 1.5×	96 0.3×	172 0.9×	86 0.6×	47	1.5k

Countries citing papers authored by Masayoshi Oyama

Since Specialization

Citations

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

Fields of papers citing papers by Masayoshi Oyama

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Masayoshi Oyama

This figure shows the co-authorship network connecting the top 25 collaborators of Masayoshi Oyama. A scholar is included among the top collaborators of Masayoshi Oyama 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 Masayoshi Oyama. Masayoshi Oyama 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

Miyamoto, Yuri, Ryuichi Hayashi, Yuta Yoshino, et al.. (2025). Kobochromone A, a polyphenol in Carex kobomugi, suppresses androgen signaling induced by 11-oxygenated androgens and enhances the efficacy of AKT inhibitors in triple-negative breast cancer cells. Steroids. 223. 109692–109692.

Kamiya, Tetsuro, et al.. (2024). Methoxylated Flavones from Casimiroa edulis La Llave Suppress MMP9 Expression via Inhibition of the JAK/STAT3 Pathway and TNFα-Dependent Pathways. Journal of Agricultural and Food Chemistry. 72(26). 14678–14683. 2 indexed citations

Nakashima, Ken‐ichi, Naohito Abe, Masayoshi Oyama, Hiroko Murata, & Makoto Inoue. (2023). Sulfur-containing spiroketals from Breynia disticha and evaluations of their anti-inflammatory effect. Beilstein Journal of Organic Chemistry. 19. 1604–1614.

Endo, Satoshi, Naohito Abe, Eiji Yamaguchi, et al.. (2022). Antiandrogenic Effects of a Polyphenol in Carex kobomugi through Inhibition of Androgen Synthetic Pathway and Downregulation of Androgen Receptor in Prostate Cancer Cell Lines. International Journal of Molecular Sciences. 23(22). 14356–14356. 3 indexed citations

Abe, Naohito, et al.. (2022). Two new methoxylated flavones isolated from Casimiroa edulis La Llave and their MMP-9 inhibitory activity. Natural Product Research. 36(23). 5959–5966. 1 indexed citations

Suleimen, E. M., Masayoshi Oyama, Eslam B. Elkaeed, et al.. (2021). Isolation and In Silico Anti-COVID-19 Main Protease (Mpro) Activities of Flavonoids and a Sesquiterpene Lactone from Artemisia sublessingiana. Journal of Chemistry. 2021. 1–8. 26 indexed citations

Nakashima, Ken‐ichi, Naohito Abe, Fang‐Rong Chang, Makoto Inoue, & Masayoshi Oyama. (2016). Pteleifolols A–E, acetophenone di-C-glycosides and a benzopyran dimer from the leaves of Melicope pteleifolia. Journal of Natural Medicines. 71(1). 299–304. 7 indexed citations

Ohba, Takuya, Yuta Yoshino, Mitsue Ishisaka, et al.. (2015). JapaneseHuperzia serrataextract and the constituent, huperzine A, ameliorate the scopolamine-induced cognitive impairment in mice. Bioscience Biotechnology and Biochemistry. 79(11). 1838–1844. 48 indexed citations

Miura, Yoko, Masayoshi Oyama, Kazuhiro Iguchi, et al.. (2015). Anti-Androgenic Activity of Icarisid II from Epimedium Herb in Prostate Cancer LNCaP Cells. Journal of Nutritional Science and Vitaminology. 61(2). 201–204. 9 indexed citations

10.

Arai, Yuki, Satoshi Endo, Naohito Abe, et al.. (2014). Structure–activity relationship of flavonoids as potent inhibitors of carbonyl reductase 1 (CBR1). Fitoterapia. 101. 51–56. 30 indexed citations

11.

Ito, Tetsuro, et al.. (2013). Absolute configuration and conformational analysis of C-glucoside of a resveratrol trimer: Structure of hopeaside E from Hopea utilis. Phytochemistry Letters. 6(2). 193–197. 8 indexed citations

12.

Ito, Tetsuro, Mamoru Kakino, Shigemi Tazawa, et al.. (2012). Identification of Phenolic Compounds in Aquilaria crassna Leaves Via Liquid Chromatography-Electrospray Ionization Mass Spectroscopy. Food Science and Technology Research. 18(2). 259–262. 24 indexed citations

13.

Nakashima, Ken‐ichi, Masayoshi Oyama, Tetsuro Ito, et al.. (2012). Novel quinolinone alkaloids bearing a lignoid moiety and related constituents in the leaves of Melicope denhamii. Tetrahedron. 68(10). 2421–2428. 71 indexed citations

14.

Iguchi, Kazuhiro, Tetsuro Ito, Shigeyuki Usui, et al.. (2012). Antiandrogenic Activity of Resveratrol Analogs in Prostate Cancer LNCaP Cells. Journal of Andrology. 33(6). 1208–1215. 28 indexed citations

15.

Kakino, Mamoru, Hiroshi Izuta, Tetsuro Ito, et al.. (2010). Agarwood Induced Laxative EffectsviaAcetylcholine Receptors on Loperamide-Induced Constipation in Mice. Bioscience Biotechnology and Biochemistry. 74(8). 1550–1555. 72 indexed citations

16.

Ito, Tetsuro, Naohito Abe, Masayoshi Oyama, & Munekazu Iinuma. (2009). Absolute structures of C-glucosides of resveratrol oligomers from Shorea uliginosa. Tetrahedron Letters. 50(21). 2516–2520. 31 indexed citations

17.

Iliya, Ibrahim, Yukihiro Akao, Kenji Matsumoto, et al.. (2006). Growth Inhibition of Stilbenoids in Welwitschiaceae and Gnetaceae through Induction of Apoptosis in Human Leukemia HL60 Cells. Biological and Pharmaceutical Bulletin. 29(7). 1490–1492. 11 indexed citations

18.

Ito, Tetsuro, Zulfiqar Ali, Miyuki Furusawa, et al.. (2005). New Resveratrol Tetramers from the Stem Bark ofUpuna borneensis. Chemistry & Biodiversity. 2(12). 1673–1684. 10 indexed citations

19.

Ito, Tetsuro, Zulfiqar Ali, Miyuki Furusawa, et al.. (2005). Two Novel Trimeric Resveratrol Derivatives fromCotylelobium lanceolatum. Chemistry & Biodiversity. 2(9). 1200–1216. 14 indexed citations

20.

Matsuda, Hisashi, et al.. (1991). Pharmacological Study on Citrus Fruits. II. Anti-allergic Effect of Fruit of Citrus unshiu MARKOVICH (2). On Flavonoid Components. YAKUGAKU ZASSHI. 111(3). 193–198. 39 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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