Naomi Oka

931 total citations
45 papers, 696 citations indexed

About

Naomi Oka is a scholar working on Neurology, Epidemiology and Molecular Biology. According to data from OpenAlex, Naomi Oka has authored 45 papers receiving a total of 696 indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Neurology, 13 papers in Epidemiology and 8 papers in Molecular Biology. Recurrent topics in Naomi Oka's work include Biotin and Related Studies (5 papers), Neuroendocrine Tumor Research Advances (4 papers) and Lung Cancer Research Studies (4 papers). Naomi Oka is often cited by papers focused on Biotin and Related Studies (5 papers), Neuroendocrine Tumor Research Advances (4 papers) and Lung Cancer Research Studies (4 papers). Naomi Oka collaborates with scholars based in Japan, Germany and United States. Naomi Oka's co-authors include Naokatsu Saeki, Jun Kimura, Shinichiro Nakamura, Ichiro Akiguchi, Shozo Nakano, Yasuhiro Kawamoto, Kazuyuki Shimada, Nobuyuki Kobayashi, Kazuhiro Kondo and Yoshimitsu Takakura and has published in prestigious journals such as Scientific Reports, Biochemical and Biophysical Research Communications and Neuroscience.

In The Last Decade

Naomi Oka

44 papers receiving 691 citations

Peers

Countries citing papers authored by Naomi Oka

Since Specialization

Citations

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

Fields of papers citing papers by Naomi Oka

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Naomi Oka

This figure shows the co-authorship network connecting the top 25 collaborators of Naomi Oka. A scholar is included among the top collaborators of Naomi 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 Naomi Oka. Naomi 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	Donepezil for Fatigue and Psychological Symptoms in Post–COVID-19 Condition 2025 ·JAMA Network Open ·Kensuke Nakamura, Kazuhiro Kondo, Naomi Oka, Kazuma Yamakawa, Kenya Ie, Tadahiro Goto, Shigeki Fujitani	2
2	Efficacy of Donepezil for Fatigue and Psychological Symptoms in Post-COVID-19 Condition: Study Protocol for a Multicenter Randomized, Placebo-controlled, Double-blind Trial 2024 ·PubMed ·(unknown), Kensuke Nakamura, Kazuhiro Kondo, Naomi Oka, (unknown), (unknown), Kazuma Yamakawa, Kenya Ie, Yusuke Yamamoto, (unknown), (unknown), Ryo Kikuchi, Hideki Yoshida, Hiroki Saito, Tadahiro Goto, Shigeki Fujitani	1
3	Relationship between human herpesvirus 6 infection and inflammatory bowel disease using novel biomarker 2023 ·JGH Open ·Satohiro Matsumoto, (unknown), Yukio Yoshida, Nobuyuki Kobayashi, Naomi Oka, Hiroyuki Yanagisawa, Kazuhiro Kondo	1
4	SARS-CoV-2 S1 protein causes brain inflammation by reducing intracerebral acetylcholine production 2023 ·iScience ·Naomi Oka, Kazuyuki Shimada, (unknown), Nobuyuki Kobayashi, Kazuhiro Kondo	15
5	VP26, a herpes simplex virus type 1 capsid protein, increases DNA methylation in COASY promoter region 2022 ·Brain Behavior & Immunity - Health ·(unknown), Nobuyuki Kobayashi, Kazuyuki Shimada, (unknown), Naomi Oka, Kazuhiro Kondo	1
6	Classification and Prognostic Stratification of Bronchopulmonary Neuroendocrine Neoplasms 2019 ·Neuroendocrinology ·Naomi Oka, Atsuko Kasajima, Björn Konukiewitz, Akira Sakurada, Yoshinori Okada, Toru Kameya, Wilko Weichert, Yuichi Ishikawa, Hiroyoshi Suzuki, Hironobu Sasano, Günter Klöppel	28
7	Inflammation and PD-L1 expression in pulmonary neuroendocrine tumors 2018 ·Endocrine Related Cancer ·Atsuko Kasajima, Yuichi Ishikawa, Ayaka J. Iwata, Katja Steiger, Naomi Oka, Hirotaka Ishida, Akira Sakurada, Hiroyoshi Suzuki, Toru Kameya, Björn Konukiewitz, Günter Klöppel, Yoshinori Okada, Hironobu Sasano, Wilko Weichert	34
8	Clinicopathological Profiling of Lung Carcinoids with a Ki67 Index > 20% 2018 ·Neuroendocrinology ·Atsuko Kasajima, Björn Konukiewitz, Naomi Oka, Hiroyoshi Suzuki, Akira Sakurada, Yoshinori Okada, Toru Kameya, Yuichi Ishikawa, Hironobu Sasano, Wilko Weichert, Günter Klöppel	40
9	Increased interleukin-1β and basic fibroblast growth factor levels in the cerebrospinal fluid during human herpesvirus-6B (HHV-6B) encephalitis 2017 ·Biochemical and Biophysical Research Communications ·(unknown), Nobuyuki Kobayashi, Kazuyuki Shimada, Naomi Oka, Mayumí Takáhashi, (unknown), (unknown), Hiroyuki Namba, Yoshihiro Saito, Yasuyuki Wada, Aikou Okamoto, Hiroyuki Ida, Kazuhiro Kondo	7
10	Human herpesvirus 6 and 7 are biomarkers for fatigue, which distinguish between physiological fatigue and pathological fatigue 2016 ·Biochemical and Biophysical Research Communications ·Ryo Aoki, Nobuyuki Kobayashi, Go Suzuki, Hirohiko Kuratsune, Kazuyuki Shimada, Naomi Oka, Mayumí Takáhashi, Wataru Yamadera, Masayuki Iwashita, Shinichi Tokuno, Masashi Nibuya, Masaaki Tanichi, Yasuo Mukai, (unknown), Kazuhiro Kondo, Hiroshi Ito, Kazuhiko Nakayama	23
11	Cytokeratin 7-positive/cytokeratin 20-negative cecal adenocarcinoma metastatic to the uterine cervix: a case report 2015 ·World Journal of Surgical Oncology ·Masafumi Toyoshima, (unknown), (unknown), (unknown), Naomi Oka, (unknown), Hiroyoshi Suzuki, (unknown), Kosuke Yoshinaga	8
12	Expression, Purification, and Immobilization of Recombinant Tamavidin 2 Fusion Proteins 2014 ·Methods in molecular biology ·Yoshimitsu Takakura, Naomi Oka, Masako Tsunashima	1
13	Tamavidin 2-HOT, a highly thermostable biotin-binding protein 2013 ·Journal of Biotechnology ·Yoshimitsu Takakura, Junko Suzuki, Naomi Oka, Yoshimitsu Kakuta	12
14	Increase in the IgG avidity index due to herpes simplex virus type 1 reactivation and its relationship with cognitive function in amnestic mild cognitive impairment and Alzheimer’s disease 2012 ·Biochemical and Biophysical Research Communications ·Nobuyuki Kobayashi, Tomoyuki Nagata, Shunichiro Shinagawa, Naomi Oka, Kazuyuki Shimada, Akihiro Shimizu, Yoshitaka Tatebayashi, Hisashi Yamada, Kazuhiko Nakayama, Kazuhiro Kondo	59
15	Engineering of novel tamavidin 2 muteins with lowered isoelectric points and lowered non-specific binding properties 2012 ·Journal of Bioscience and Bioengineering ·Yoshimitsu Takakura, Naomi Oka, (unknown), Masako Tsunashima	9
16	Tamavidin, a versatile affinity tag for protein purification and immobilization 2009 ·Journal of Biotechnology ·Yoshimitsu Takakura, Naomi Oka, (unknown), Masako Tsunashima, (unknown), Hiroshi Tsukamoto, Yuji Ishida, Takeshi Yamamoto	26
17	Hearing preservation and intraoperative auditory brainstem response and cochlear nerve compound action potential monitoring in the removal of small acoustic neurinoma via the retrosigmoid approach 2008 ·Journal of Neurology Neurosurgery & Psychiatry ·Iwao Yamakami, (unknown), Naokatsu Saeki, (unknown), Naomi Oka	50
18	Ascorbic acid stimulates barrier function of cultured endothelial cell monolayer 1995 ·Journal of Cellular Physiology ·Naoki Utoguchi, Kenji Ikeda, Kazuhiko Saeki, Naomi Oka, Hiroyuki Mizuguchi, (unknown), Shinsaku Nakagawa, Tadanori Mayumi	45
19	TREATMENT FOR NEWLY DIAGNOSED STAGE D2 PROSTATIC CARCINOMA WITH HORMONAL THERAPY ALONE, OR CHEMOTHERAPY AGENTS IN COMBINATION WITH HORMONES 1991 ·The Japanese Journal of Urology ·Akira Fujii, Naomi Oka, Shelley H. Miyasaki, (unknown), (unknown), Shinichi Morishita, K Yamanaka, Naoki Itoh, Yuko Okamoto, Hironori Tanaka, (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown)	1
20	Post-traumatic intention tremor - clinical features and CT findings 1989 ·Neurosurgical Review ·Yasuo Iwadate, Naokatsu Saeki, Hiroki Namba, Masaru Odaki, Naomi Oka, Akira Yamaura	20

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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