Koji Ohta

9.4k total citations · 1 hit paper
237 papers, 7.6k citations indexed

About

Koji Ohta is a scholar working on Materials Chemistry, Electronic, Optical and Magnetic Materials and Organic Chemistry. According to data from OpenAlex, Koji Ohta has authored 237 papers receiving a total of 7.6k indexed citations (citations by other indexed papers that have themselves been cited), including 88 papers in Materials Chemistry, 67 papers in Electronic, Optical and Magnetic Materials and 64 papers in Organic Chemistry. Recurrent topics in Koji Ohta's work include Nonlinear Optical Materials Research (54 papers), Nonlinear Optical Materials Studies (50 papers) and Porphyrin and Phthalocyanine Chemistry (32 papers). Koji Ohta is often cited by papers focused on Nonlinear Optical Materials Research (54 papers), Nonlinear Optical Materials Studies (50 papers) and Porphyrin and Phthalocyanine Chemistry (32 papers). Koji Ohta collaborates with scholars based in Japan, Belgium and United States. Koji Ohta's co-authors include Kenji Kamada, Masayoshi Nakano, Ryohei Kishi, Takashi Kubo, Benoı̂t Champagne, Edith Botek, Hatsuo Ishida, Heimei Yuki, Yoshio Okamoto and Hideaki Takahashi and has published in prestigious journals such as Journal of the American Chemical Society, Physical Review Letters and Advanced Materials.

In The Last Decade

Koji Ohta

226 papers receiving 7.4k citations

Hit Papers

Optically active poly(triphenylmethyl methacrylate) with ... 1979 2026 1994 2010 1979 100 200 300 400
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.

  1. Optically active poly(triphenylmethyl methacrylate) with one-handed helical conformation
    1979 429 citations Koji Ohta et al. profile →

Peers

Koji Ohta
Kazuya Saito Japan
Tsuneo Okubo Japan
Kenji Matsuda Japan
Dmitry Bedrov United States
Marek Samoć Poland
Thierry Verbiest Belgium
René van Roij Netherlands
Vincent Rodriguez France
Miklós Kertész United States
Tsuyoshi Asahi Japan
Kazuya Saito Japan
Koji Ohta
Citations per year, relative to Koji Ohta Koji Ohta (= 1×) peers Kazuya Saito

Countries citing papers authored by Koji Ohta

Since Specialization
Citations

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

Fields of papers citing papers by Koji Ohta

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Koji Ohta

This figure shows the co-authorship network connecting the top 25 collaborators of Koji Ohta. A scholar is included among the top collaborators of Koji 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 Koji Ohta. Koji Ohta 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.
IWAKI, Ichiro, et al.. (2016). INFLUENCE OF ALKALI SILICA REACTION ON FATIGUE RESISTANCE OF RC BRIDGE DECK. Journal of Japan Society of Civil Engineers Ser E2 (Materials and Concrete Structures). 72(2). 126–145. 13 indexed citations
2.
Morokuma, Tomoki, Masuo Tanaka, M. Yoshida, et al.. (2015). LIGO/Virgo G184098: optical transient search with Kiso Schmidt telescope and KWFC on behalf of J-GEM collaboration.. GCN. 18361. 1.
3.
Maeda, Yoshihito, Makoto Yamada, Tatsuro Endo, et al.. (2014). 1700 nm ASE light source and its application to mid-infrared spectroscopy. Australian Conference on Optical Fibre Technology. 410–411. 8 indexed citations
4.
Tahara, Kazukuni, Yuki Yamamoto, Dustin E. Gross, et al.. (2013). Syntheses and Properties of Graphyne Fragments: Trigonally Expanded Dehydrobenzo[12]annulenes. Chemistry - A European Journal. 19(34). 11251–11260. 61 indexed citations
5.
Takechi, Masaaki, Koji Ohta, Akira Ohta, et al.. (2012). 3-dimensional composite scaffolds consisting of apatite-PLGA-atelocollagen for bone tissue engineering. Dental Materials Journal. 31(3). 465–471. 16 indexed citations
6.
Ohta, Koji, Satoru Yamada, Kenji Kamada, et al.. (2010). Two-Photon Absorption Properties of Two-Dimensional π-Conjugated Chromophores: Combined Experimental and Theoretical Study. The Journal of Physical Chemistry A. 115(2). 105–117. 59 indexed citations
7.
Kishi, Ryohei, Sean Bonness, Kyohei Yoneda, et al.. (2010). Long-range corrected density functional theory study on static second hyperpolarizabilities of singlet diradical systems. The Journal of Chemical Physics. 132(9). 94107–94107. 89 indexed citations
8.
Dy, Joanne T., Kazuya Ogawa, Kenji Kamada, Koji Ohta, & Yoshiaki Kobuke. (2008). Stepwise elongation effect on the two-photon absorption of self-assembled butadiyne porphyrins. Chemical Communications. 3411–3411. 18 indexed citations
9.
Kamada, Kenji, Koji Ohta, Takashi Kubo, et al.. (2007). Strong Two‐Photon Absorption of Singlet Diradical Hydrocarbons. Angewandte Chemie International Edition. 46(19). 3544–3546. 265 indexed citations
10.
Ohya, Yuichi, et al.. (2007). Construction of supramolecular assemblies and self-organized structures using oligo-DNAs. Nucleic Acids Symposium Series. 51(1). 37–38. 1 indexed citations
11.
Dy, Joanne T., et al.. (2007). A photochromic porphyrin–perinaphthothioindigo conjugate and its two-photon absorption properties. Chemical Communications. 5170–5170. 13 indexed citations
12.
Nakano, Masayoshi, Ryohei Kishi, Nozomi Nakagawa, et al.. (2006). Second Hyperpolarizabilities (γ) of Bisimidazole and Bistriazole Benzenes:  Diradical Character, Charged State, and Spin State Dependences. The Journal of Physical Chemistry A. 110(12). 4238–4243. 91 indexed citations
13.
Slepkov, Aaron D., Frank A. Hegmann, Rik R. Tykwinski, et al.. (2006). Two-photon absorption in two-dimensional conjugated quadrupolar chromophores. Optics Letters. 31(22). 3315–3315. 38 indexed citations
14.
Otsuki, Soichi, Koji Ohta, Kaoru Tamada, & Shin‐ichi Wakida. (2005). Thickness measurements on transparent substrates based on reflection ellipsometry I Optical effects of high-refractive-index additional layers. Applied Optics. 44(28). 5910–5910. 7 indexed citations
15.
Kiyohara, Kenji, et al.. (1999). The Boundary Condition in the Gibbs Ensemble Simulation of a Stockmayer Fluid under an Applied Field. Molecular Simulation. 23(1). 95–107. 9 indexed citations
16.
Zhao, Jiying, et al.. (1996). An Outstandingness Oriented Image Segmentation and its Application. Queensland's institutional digital repository (The University of Queensland). 1. 45–48. 14 indexed citations
17.
Ohta, Koji, et al.. (1989). Identification of Biting Midges (Culicoides) and Their Distribution in Aomori Prefecture. Journal of the Japan Veterinary Medical Association. 42(5). 331–337. 4 indexed citations
18.
Ishihara, Shunsō, et al.. (1985). Gold abundance of Japanese granitoids-A preliminary report. Kōzan chishitsu. 35(192). 295–298. 2 indexed citations
19.
Ohta, Koji, Reikichi Iwamoto, & Masaru Miya. (1985). FT-IR-ATR spectroscopic study of alkali-treated polyacrylonitrile films.. NIPPON KAGAKU KAISHI. 1200–1207.
20.
Miya, Masaru, Reikichi Iwamoto, Koji Ohta, & Seiichi Mima. (1985). N-acetylation of chitosan films.. KOBUNSHI RONBUNSHU. 42(3). 181–189. 22 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Kazuya Saito Breakdown of academic impact, for papers by Tsuneo Okubo Breakdown of academic impact, for papers by Kenji Matsuda Breakdown of academic impact, for papers by Dmitry Bedrov Breakdown of academic impact, for papers by Marek Samoć Breakdown of academic impact, for papers by Thierry Verbiest Breakdown of academic impact, for papers by René van Roij Breakdown of academic impact, for papers by Vincent Rodriguez Breakdown of academic impact, for papers by Miklós Kertész Breakdown of academic impact, for papers by Tsuyoshi Asahi
Rankless by CCL
2026