Tatsushi Oka

2.7k total citations · 1 hit paper
75 papers, 2.1k citations indexed

About

Tatsushi Oka is a scholar working on Molecular Biology, Biotechnology and Oncology. According to data from OpenAlex, Tatsushi Oka has authored 75 papers receiving a total of 2.1k indexed citations (citations by other indexed papers that have themselves been cited), including 38 papers in Molecular Biology, 19 papers in Biotechnology and 15 papers in Oncology. Recurrent topics in Tatsushi Oka's work include Enzyme Production and Characterization (19 papers), Protein Hydrolysis and Bioactive Peptides (16 papers) and Peptidase Inhibition and Analysis (14 papers). Tatsushi Oka is often cited by papers focused on Enzyme Production and Characterization (19 papers), Protein Hydrolysis and Bioactive Peptides (16 papers) and Peptidase Inhibition and Analysis (14 papers). Tatsushi Oka collaborates with scholars based in Japan, Australia and United States. Tatsushi Oka's co-authors include Kazuyuki Morihara, Hiroshige Tsuzuki, Heejoon Han, Yoon‐Jae Whang, Oliver Linton, Mitsuo Ebata, Hideo Inoue, Zhongjun Qu, Dukpa Kim and Dan Zhu and has published in prestigious journals such as Nature, Journal of Biological Chemistry and PLoS ONE.

In The Last Decade

Tatsushi Oka

67 papers receiving 1.9k citations

Hit Papers

align trajectories

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.

The cross-quantilogram: Measuring quantile dependence and testing directional predictability between time series

2016 400 citations Tatsushi Oka et al. Journal of Econometrics profile →

Peers

Countries citing papers authored by Tatsushi Oka

Since Specialization

Citations

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

Fields of papers citing papers by Tatsushi Oka

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Tatsushi Oka

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

#	Work	Indexed citations
1	Regression adjustment for estimating distributional treatment effects in randomized controlled trials 2025 ·Econometric Reviews ·Tatsushi Oka, (unknown), (unknown), (unknown)	0
2	Efficient and Scalable Estimation of Distributional Treatment Effects with Multi-Task Neural Networks 2025 ·SSRN Electronic Journal ·Tsuyoshi Hirata, (unknown), Tatsushi Oka, (unknown), (unknown)	0
3	The effect of human mobility restrictions on the COVID-19 transmission network in China 2021 ·PLoS ONE ·Tatsushi Oka, Wei Wei, Dan Zhu	30
4	Heterogeneous Impact of the Minimum Wage 2021 ·The Journal of Human Resources ·Tatsushi Oka, Ken Yamada	1
5	Indirect inference with a non-smooth criterion function 2019 ·Journal of Econometrics ·David T. Frazier, Tatsushi Oka, Dan Zhu	5
6	Quantile treatment effects in difference in differences models under dependence restrictions and with only two time periods 2018 ·Journal of Econometrics ·Brantly Callaway, (unknown), Tatsushi Oka	28
7	In vitro effects of various heterocyclic thiol compounds and .BETA.-lactam antibiotics on vitamin K-dependent .GAMMA.-glutamylcarboxylation activity in liver microsomes. 1988 ·The Japanese Journal of Pharmacology ·Tatsushi Oka, Akira Touchi, Kiyoshi Ezumi, Masumi Yamakawa, Takashi Matsubara	1
8	Fundamental study on the adsorption of excess heparin using IONEX during blood-perfused artificial organs. 1987 ·(unknown), Tatsushi Oka, Tohru Tani, (unknown), Tomohisa Yoshioka, (unknown), (unknown), (unknown), (unknown)	1
9	Effect of N-methyltetrazolethiol on liver microsomal gamma-glutamylcarboxylation. Modification of the in vitro action of N-methyltetrazolethiol. 1987 ·The Japanese Journal of Pharmacology ·Tatsushi Oka, Akira Touchi, Takashi Matsubara	5
10	Pharmacokinetics of latamoxef and N-methyltetrazolethiol in rats associated with the development of disulfiram-like effects. 1987 ·The Japanese Journal of Pharmacology ·Takashi Matsubara, (unknown), (unknown), Tatsushi Oka	8
11	Pharmacokinetics of Latamoxef and N-Methyltetrazolethiol in Rats Associated with the Development of Disulfiram-Like Effects 1987 ·The Japanese Journal of Pharmacology ·Takashi Matsubara, (unknown), (unknown), Tatsushi Oka	0
12	1983 ·NIPPON KAGAKU KAISHI ·Ryōnosuke Muneyuki, Tatsushi Oka, Kazuyuki Morihara	0
13	Semi-synthesis of human insulin by trypsin-catalysed replacement of Ala-B30 by Thr in porcine insulin 1979 ·Nature ·Kazuyuki Morihara, Tatsushi Oka, Hiroshige Tsuzuki	98
14	Studies on new acid proteases from Scytalidium lingnicolumn M-133. IV. Some physicochemical properties and substrate specificities of acid proteases A-1 and A-2 of Scytalidium lignicolumn ATCC 24568. 1976 ·Agricultural and Biological Chemistry ·Kōhei Oda, Sawao Murao, Tatsushi Oka, Kazuyuki Morihara	7
15	Comparative study of various serine alkaline proteinases from microorganisms 1974 ·Archives of Biochemistry and Biophysics ·Kazuyuki Morihara, Tatsushi Oka, Hiroshige Tsuzuki	18
16	Effect of secondary interaction on the enzymatic activity of subtilisin BPN′: Comparison with α‐chymotrypsin, trypsin, and elastase 1973 ·FEBS Letters ·Kazuyuki Morihara, Tatsushi Oka	30
17	On the Specificity of a Rennin-like Enzyme fromMucor pusillus 1973 ·Agricultural and Biological Chemistry ·Tatsushi Oka, (unknown), Hiroshige Tsuzuki, Kazuyuki Morihara, Κει Arima	11
18	On the specificity of Bacillus subtilis neutral protease in relation to the compound active site 1969 ·Archives of Biochemistry and Biophysics ·Kazuyuki Morihara, Tatsushi Oka, Hiroshige Tsuzuki	23
19	Elastase Activity of some Purified Proteinase Preparations as Related to their Depilatory Action 1965 ·Agricultural and Biological Chemistry ·Kazuyuki Morihara, Tatsushi Oka, Hiroshige Tsuzuki	2
20	Pseudomonas aeruginosa Elastase 1965 ·Journal of Biological Chemistry ·Kazuyuki Morihara, Hiroshige Tsuzuki, Tatsushi Oka, Hideo Inoue, Mitsuo Ebata	239

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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