Tomihisa Ohta

6.9k total citations · 1 hit paper
188 papers, 5.6k citations indexed

About

Tomihisa Ohta is a scholar working on Molecular Biology, Organic Chemistry and Pharmacology. According to data from OpenAlex, Tomihisa Ohta has authored 188 papers receiving a total of 5.6k indexed citations (citations by other indexed papers that have themselves been cited), including 76 papers in Molecular Biology, 59 papers in Organic Chemistry and 56 papers in Pharmacology. Recurrent topics in Tomihisa Ohta's work include Microbial Natural Products and Biosynthesis (27 papers), Marine Sponges and Natural Products (26 papers) and Chemical synthesis and alkaloids (23 papers). Tomihisa Ohta is often cited by papers focused on Microbial Natural Products and Biosynthesis (27 papers), Marine Sponges and Natural Products (26 papers) and Chemical synthesis and alkaloids (23 papers). Tomihisa Ohta collaborates with scholars based in Japan, United States and Egypt. Tomihisa Ohta's co-authors include Sachiko Tsukamoto, William S. Bowers, Shigeo Nozoe, Yasushi Ohizumi, Fumihide Takano, Hiroshi Hirota, Hikaru Kato, Shigeo Nozoe, Yasushi Yamazoe and Katsuyuki Fukuda and has published in prestigious journals such as Science, Journal of the American Chemical Society and Angewandte Chemie International Edition.

In The Last Decade

Tomihisa Ohta

182 papers receiving 5.4k citations

Hit Papers

align trajectories sort by overperformance

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Discovery of Insect Anti-Juvenile Hormones in Plants

1976 529 citations Tomihisa Ohta et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Tomihisa Ohta Japan	42	1.9k	1.7k	1.6k	1.0k	1.0k	188	5.6k
Hideyuki Shigemori Japan	43	1.9k 1.0×	1.9k 1.1×	1.7k 1.1×	1.2k 1.2×	1.0k 1.0×	219	5.3k
Olov Sterner Sweden	46	3.1k 1.6×	2.2k 1.3×	2.8k 1.8×	624 0.6×	2.5k 2.5×	428	9.2k
John A. Beutler United States	41	3.0k 1.6×	1.7k 1.0×	1.1k 0.7×	745 0.7×	623 0.6×	180	5.6k
Hartmut Laatsch Germany	48	2.5k 1.3×	2.2k 1.3×	3.0k 1.9×	1.7k 1.7×	1.4k 1.4×	347	7.3k
Orazio Taglialatela‐Scafati Italy	42	2.5k 1.3×	1.7k 1.0×	2.3k 1.5×	1.7k 1.6×	1.9k 1.9×	240	7.7k
Prasat Kittakoop Thailand	42	1.7k 0.9×	1.1k 0.6×	1.9k 1.2×	855 0.8×	1.0k 1.0×	166	5.1k
Guy T. Carter United States	39	3.0k 1.6×	1.9k 1.1×	2.8k 1.8×	1.0k 1.0×	661 0.6×	112	6.7k
A. A. Leslie Gunatilaka United States	48	3.4k 1.8×	1.2k 0.7×	2.8k 1.7×	840 0.8×	1.7k 1.7×	245	7.7k
Jee H. Jung South Korea	44	2.9k 1.5×	1.3k 0.8×	1.8k 1.1×	1.6k 1.6×	825 0.8×	228	6.5k
Lars Bohlin Sweden	47	3.3k 1.7×	902 0.5×	1.1k 0.7×	1.0k 1.0×	1.9k 1.9×	163	6.3k

Countries citing papers authored by Tomihisa Ohta

Since Specialization

Citations

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

Fields of papers citing papers by Tomihisa Ohta

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Tomihisa Ohta

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

Allam, Ahmed E., et al.. (2015). New secoiridoid ester of swertiamarin and secoxyloganic acid with hepatoprotective activity from Centaurium spicatum L.. Journal of Pharmacy & Pharmacognosy Research. 3(1). 69–76. 2 indexed citations

Kato, Hikaru, et al.. (2012). Anti-inflammatory constituents from Tabebuia avellanedae. Fitoterapia. 83(8). 1484–1488. 27 indexed citations

Kawabata, Tetsuro, et al.. (2012). Melanogenesis-Modulating Diketopiperazine Derivatives from Hypocrea spp.. Heterocycles. 87(2). 417–417. 1 indexed citations

Ohta, Tomihisa, et al.. (2010). P-54 New biflavonoyl ether glycosides from Zizyphus spina-christi : Symmetrical ether derived from two different flavonoids.. 631–635. 1 indexed citations

Hasegawa, Tatsuya, et al.. (2008). Antioxidant C-glycosyl flavones from the leaves of Sasa kurilensis var. gigantea. Phytochemistry. 69(6). 1419–1424. 45 indexed citations

Tsukamoto, Sachiko, Hikaru Kato, Yuka Nojiri, et al.. (2008). Notoamides F−K, Prenylated Indole Alkaloids Isolated from a Marine-Derived Aspergillus sp.. Journal of Natural Products. 71(12). 2064–2067. 121 indexed citations

Hasegawa, Tatsuya, et al.. (2008). Bioactive monoterpene glycosides conjugated with gallic acid from the leaves of Eucalyptus globulus. Phytochemistry. 69(3). 747–753. 101 indexed citations

Suzuki, Nobutaka, Satoshi Ohno, Tsutomu Kamei, et al.. (2004). Complementary and Alternative Medicine in Japan. Advances in experimental medicine and biology. 546. 9–25. 4 indexed citations

Takahashi, Ichiro, et al.. (2002). Crystal Structure of a Complex Formed from Triphenylphosphine Oxide and 6-Chloro-2-pyridone. Analytical Sciences. 18(12). 1407–1408. 2 indexed citations

10.

Ohta, Tomihisa, et al.. (2002). Localization and contents of paradisins, the most potent CYP3A4 inhibitors, in grapefruit Citrus paradisii and grapefruit juice. 56(6). 264–267. 2 indexed citations

11.

Tassaneeyakul, Wichittra, Lian‐Qing Guo, Katsuyuki Fukuda, Tomihisa Ohta, & Yasushi Yamazoe. (2000). Inhibition Selectivity of Grapefruit Juice Components on Human Cytochromes P450. Archives of Biochemistry and Biophysics. 378(2). 356–363. 192 indexed citations

12.

Obara, Yutaro, Norimichi Nakahata, Takako Kita, et al.. (1999). Stimulation of neurotrophic factor secretion from 1321N1 human astrocytoma cells by novel diterpenoids, scabronines A and G. European Journal of Pharmacology. 370(1). 79–84. 66 indexed citations

13.

Araki, Tsutomu, et al.. (1997). EFFECTS OF L-DOPA AND BROMOCRIPTINE ON HALOPERIDOL-INDUCED MOTOR DEFICITS IN MICE. Life Sciences. 61(26). 2529–2538. 36 indexed citations

14.

Takahashi, Akira, Genjiro Kusano, Tomihisa Ohta, & Shigeo Nozoe. (1993). Revised Structures of Flavidulols, Constituents of Lactarius flavidulus IMAI, and the Structure of Flavidulol D.. Chemical and Pharmaceutical Bulletin. 41(11). 2032–2033. 9 indexed citations

15.

Takahashi, Akira, et al.. (1992). Russuphelin A, a New Cytotoxic Substance from the Mushroom Russula subnigricans Hongo.. Chemical and Pharmaceutical Bulletin. 40(12). 3185–3188. 23 indexed citations

16.

Ohta, Tomihisa, et al.. (1991). Favelines, novel tricyclic benzocycloheptenes with cytotoxic activities from brazilian plant, doscolus phyllacanthus. Tetrahedron Letters. 32(26). 3083–3086. 36 indexed citations

17.

Kobayashi, Jun’ichi, Jie‐Fei Cheng, Tomihisa Ohta, et al.. (1990). Eudistomidins B, C, and D: novel antileukemic alkaloids from the Okinawan marine tunicate Eudistoma glaucus. The Journal of Organic Chemistry. 55(11). 3666–3670. 92 indexed citations

18.

Cheng, Jie‐Fei, Hideshi Nakamura, Yasushi Ohizumi, et al.. (1988). Ascididemin, a novel pentacyclic aromatic alkaloid with potent antileukemic activity from the okinawan tunicate didemnum sp.. Tetrahedron Letters. 29(10). 1177–1180. 109 indexed citations

19.

Ohta, Tomihisa, et al.. (1988). Stereoselective hydroxylation of N-carbamoyl-L-pyroglutamate. Synthesis of (−)-bulgecinine. Tetrahedron Letters. 29(3). 329–332. 61 indexed citations

20.

Ohta, Tomihisa & Hiroshi Hikino. (1979). Carbon‐13 NMR spectra of ericaceous toxins. Organic Magnetic Resonance. 12(8). 445–449. 17 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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