Ikuo Otsuka

2.0k total citations
55 papers, 636 citations indexed

About

Ikuo Otsuka is a scholar working on Molecular Biology, Genetics and Psychiatry and Mental health. According to data from OpenAlex, Ikuo Otsuka has authored 55 papers receiving a total of 636 indexed citations (citations by other indexed papers that have themselves been cited), including 30 papers in Molecular Biology, 19 papers in Genetics and 9 papers in Psychiatry and Mental health. Recurrent topics in Ikuo Otsuka's work include Epigenetics and DNA Methylation (20 papers), Genetics and Neurodevelopmental Disorders (11 papers) and Genetic Associations and Epidemiology (10 papers). Ikuo Otsuka is often cited by papers focused on Epigenetics and DNA Methylation (20 papers), Genetics and Neurodevelopmental Disorders (11 papers) and Genetic Associations and Epidemiology (10 papers). Ikuo Otsuka collaborates with scholars based in Japan, United States and Australia. Ikuo Otsuka's co-authors include Akitoyo Hishimoto, Kenji Okazaki, Ichiro Sora, Tadasu Horai, Shuken Boku, Kentaro Mouri, Osamu Shirakawa, Shusuke Numata, Motonori Takahashi and Yasuhiro Ueno and has published in prestigious journals such as SHILAP Revista de lepidopterología, PLoS ONE and Scientific Reports.

In The Last Decade

Ikuo Otsuka

54 papers receiving 633 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ikuo Otsuka Japan 16 284 160 154 122 88 55 636
Marcos Santoro Brazil 19 283 1.0× 321 2.0× 205 1.3× 282 2.3× 104 1.2× 59 895
Letícia Spíndola Brazil 15 168 0.6× 135 0.8× 234 1.5× 197 1.6× 52 0.6× 31 574
Tadasu Horai Japan 12 182 0.6× 94 0.6× 94 0.6× 73 0.6× 51 0.6× 32 372
Lavinia Athanasiu Norway 17 179 0.6× 291 1.8× 110 0.7× 317 2.6× 72 0.8× 28 829
Hidehiro Umehara Japan 12 421 1.5× 98 0.6× 134 0.9× 112 0.9× 55 0.6× 28 707
Ling Morgan United States 10 359 1.3× 148 0.9× 175 1.1× 115 0.9× 89 1.0× 11 660
Lena Backlund Sweden 15 182 0.6× 222 1.4× 275 1.8× 402 3.3× 169 1.9× 27 926
Patricia Moretti Brazil 12 106 0.4× 96 0.6× 61 0.4× 107 0.9× 84 1.0× 26 530
Raffael Massuda Brazil 15 224 0.8× 68 0.4× 276 1.8× 259 2.1× 102 1.2× 44 833
Michael W. Nagle United States 9 329 1.2× 316 2.0× 92 0.6× 85 0.7× 246 2.8× 13 951

Countries citing papers authored by Ikuo Otsuka

Since Specialization
Citations

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

Fields of papers citing papers by Ikuo Otsuka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ikuo Otsuka

This figure shows the co-authorship network connecting the top 25 collaborators of Ikuo Otsuka. A scholar is included among the top collaborators of Ikuo Otsuka 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 Ikuo Otsuka. Ikuo Otsuka 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.
Okazaki, Kenji, Ikuo Otsuka, Haruka Minami, et al.. (2024). Accelerated epigenetic aging in alcohol dependence. Journal of Psychiatric Research. 173. 175–182. 1 indexed citations
2.
Otsuka, Ikuo, Xiaoxi Liu, Motonori Takahashi, et al.. (2024). Increased somatic mosaicism in autosomal and X chromosomes for suicide death. Molecular Psychiatry. 30(3). 881–888. 3 indexed citations
3.
Suda, Akira, Kenji Okazaki, Junichi Fujita, et al.. (2024). Biological aging analysis based on DNA methylation status for social anxiety disorder. Neuropsychopharmacology Reports. 44(4). 774–783. 3 indexed citations
4.
Otsuka, Ikuo, et al.. (2023). Effective use of memantine for catatonia in major depressive disorder after failure of electroconvulsive therapy: A case report. SHILAP Revista de lepidopterología. 2(1). e84–e84. 1 indexed citations
5.
6.
Hasegawa, Masashi, Kenji Okazaki, Ikuo Otsuka, et al.. (2023). Association of two variable number of tandem repeats in the monoamine oxidase A gene promoter with suicide completion: The present study and meta‐analysis. Neuropsychopharmacology Reports. 43(3). 338–345. 1 indexed citations
7.
Okazaki, Kenji, Ryo Kimura, Ikuo Otsuka, et al.. (2022). Epigenetic aging in Williams syndrome. Journal of Child Psychology and Psychiatry. 63(12). 1553–1562. 5 indexed citations
8.
Takemura, Yukihiro, et al.. (2022). Epigenetic clock analysis in methamphetamine dependence. Psychiatry Research. 317. 114901–114901. 3 indexed citations
9.
Okazaki, Kenji, et al.. (2021). Association of Two Variable Number of Tandem Repeats in the Monoamine Oxidase A Gene Promoter with Schizophrenia. Neuropsychiatric Disease and Treatment. Volume 17. 3315–3323. 5 indexed citations
10.
Okazaki, Kenji, Shuken Boku, Ikuo Otsuka, et al.. (2021). Clozapine increases macrophage migration inhibitory factor (MIF) expression via increasing histone acetylation of MIF promoter in astrocytes. Journal of Psychiatric Research. 135. 237–242. 9 indexed citations
11.
Horai, Tadasu, Shuken Boku, Kenji Okazaki, et al.. (2020). miR-19b is elevated in peripheral blood of schizophrenic patients and attenuates proliferation of hippocampal neural progenitor cells. Journal of Psychiatric Research. 131. 102–107. 11 indexed citations
12.
Hirata, Takashi, Ikuo Otsuka, Kenji Okazaki, et al.. (2019). Major depressive disorder-associated SIRT1 locus affects the risk for suicide in women after middle age. Psychiatry Research. 278. 141–145. 13 indexed citations
13.
Okazaki, Kenji, Ikuo Otsuka, Shusuke Numata, et al.. (2019). Epigenetic clock analysis of blood samples from Japanese schizophrenia patients. Schizophrenia. 5(1). 4–4. 31 indexed citations
14.
Otsuka, Ikuo, Kenji Okazaki, Tadasu Horai, et al.. (2019). Chemokine alterations in the postmortem brains of suicide completers. Journal of Psychiatric Research. 120. 29–33. 32 indexed citations
15.
16.
Okazaki, Kenji, Akitoyo Hishimoto, Ikuo Otsuka, et al.. (2018). Increased serum levels and promoter polymorphisms of macrophage migration inhibitory factor in schizophrenia. Progress in Neuro-Psychopharmacology and Biological Psychiatry. 83. 33–41. 20 indexed citations
17.
Yamamoto, Kazuhiro, Ikuo Otsuka, Akitoyo Hishimoto, et al.. (2018). Association of CYP2D6 polymorphisms and extrapyramidal symptoms in schizophrenia patients receiving risperidone: a retrospective study. Journal of Pharmaceutical Health Care and Sciences. 4(1). 28–28. 9 indexed citations
18.
Hishimoto, Akitoyo, Ikuo Otsuka, Yuichiro Watanabe, et al.. (2018). Longer telomeres in elderly schizophrenia are associated with long-term hospitalization in the Japanese population. Journal of Psychiatric Research. 103. 161–166. 14 indexed citations
19.
Otsuka, Ikuo, Shusuke Numata, Masaya Yanagi, et al.. (2018). Mitochondrial DNA copy number of peripheral blood in bipolar disorder: The present study and a meta-analysis. Psychiatry Research. 269. 115–117. 33 indexed citations
20.
Otsuka, Ikuo, Takeshi Izumi, Shuken Boku, et al.. (2017). Aberrant telomere length and mitochondrial DNA copy number in suicide completers. Scientific Reports. 7(1). 3176–3176. 45 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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