Tetsuya Okayama

2.7k total citations
77 papers, 1.8k citations indexed

About

Tetsuya Okayama is a scholar working on Oncology, Surgery and Molecular Biology. According to data from OpenAlex, Tetsuya Okayama has authored 77 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 28 papers in Oncology, 25 papers in Surgery and 25 papers in Molecular Biology. Recurrent topics in Tetsuya Okayama's work include Gastric Cancer Management and Outcomes (13 papers), Helicobacter pylori-related gastroenterology studies (11 papers) and Colorectal Cancer Screening and Detection (8 papers). Tetsuya Okayama is often cited by papers focused on Gastric Cancer Management and Outcomes (13 papers), Helicobacter pylori-related gastroenterology studies (11 papers) and Colorectal Cancer Screening and Detection (8 papers). Tetsuya Okayama collaborates with scholars based in Japan, Singapore and Canada. Tetsuya Okayama's co-authors include Yuji Naito, Takeshi Ishikawa, Tomohisa Takagi, Yoshito Itoh, Osamu Handa, Kazuhiko Uchiyama, Kazuhiro Kamada, Satoshi Kokura, Kazuhiro Katada and Katsura Mizushima and has published in prestigious journals such as SHILAP Revista de lepidopterología, Gastroenterology and PLoS ONE.

In The Last Decade

Tetsuya Okayama

71 papers receiving 1.8k citations

Peers

Countries citing papers authored by Tetsuya Okayama

Since Specialization

Citations

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

Fields of papers citing papers by Tetsuya Okayama

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Tetsuya Okayama

This figure shows the co-authorship network connecting the top 25 collaborators of Tetsuya Okayama. A scholar is included among the top collaborators of Tetsuya Okayama 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 Tetsuya Okayama. Tetsuya Okayama 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	Role and Potential Mechanism of Heme Oxygenase-1 in Intestinal Ischemia-Reperfusion Injury 2022 ·Antioxidants ·Kazuhiro Katada, Tomohisa Takagi, (unknown), Tomohiro Ueda, Katsura Mizushima, Akifumi Fukui, Tetsuya Okayama, Kazuhiro Kamada, Kazuhiko Uchiyama, Takeshi Ishikawa, Yuji Naito, Yoshito Itoh	3
2	Partially hydrolyzed guar gum attenuates non-alcoholic fatty liver disease in mice through the gut-liver axis 2021 ·World Journal of Gastroenterology ·(unknown), Kazuhiro Katada, Tomohisa Takagi, (unknown), Tomohiro Ueda, Katsura Mizushima, Yasuki Higashimura, Mayuko Morita, Tetsuya Okayama, Kazuhiro Kamada, Kazuhiko Uchiyama, Osamu Handa, Takeshi Ishikawa, Zenta Yasukawa, Tsutomu Ōkubo, Yoshito Itoh, Yuji Naito	26
3	High-Risk Comorbidity Influences Prognosis in Early Gastric Cancer after Noncurative Endoscopic Submucosal Dissection: A Retrospective Study 2020 ·Digestive Diseases ·N. Iwai, Osamu Dohi, Yuji Naito, Yutaka Inada, Ken Inoue, Tetsuya Okayama, Naohisa Yoshida, Kazuhiro Katada, Kazuhiro Kamada, Kazuhiko Uchiyama, Takeshi Ishikawa, Tomohisa Takagi, Hideyuki Konishi, Yoshito Itoh	8
4	Early administration of pegfilgrastim for esophageal cancer treated with docetaxel, cisplatin, and fluorouracil: A phase II study 2019 ·Cancer Science ·Takeshi Ishikawa, Tomoyo Yasuda, Tetsuya Okayama, Osamu Dohi, Naohisa Yoshida, Kazuhiro Kamada, Kazuhiko Uchiyama, Tomohisa Takagi, Hirotaka Konishi, Atsushi Shiozaki, Hitoshi Fujiwara, Hideyuki Konishi, Yuji Naito, Satoshi Teramukai, Yoshito Itoh	13
5	Higher Levels of Streptococcus in Upper Gastrointestinal Mucosa Associated with Symptoms in Patients with Functional Dyspepsia 2019 ·Digestion ·Akifumi Fukui, Tomohisa Takagi, Yuji Naito, Ryo Inoüe, Saori Kashiwagi, Katsura Mizushima, Yutaka Inada, Ken Inoue, Akihito Harusato, Osamu Dohi, Tetsuya Okayama, Kazuhiro Katada, Kazuhiro Kamada, Kazuhiko Uchiyama, Takeshi Ishikawa, Osamu Handa, Yoshito Itoh, Masanori Nakagawa	59
6	Clinical significance of soluble forms of immune checkpoint molecules in advanced esophageal cancer 2019 ·Medical Oncology ·(unknown), Takeshi Ishikawa, Toshifumi Doi, Takayuki Ota, Tomoyo Yasuda, Tetsuya Okayama, Naoyuki Sakamoto, Ken Inoue, Osamu Dohi, Naohisa Yoshida, Kazuhiro Kamada, Kazuhiko Uchiyama, Tomohisa Takagi, Hideyuki Konishi, Yuji Naito, Yoshito Itoh	26
7	Early-Stage Gastric Cancer Can Be Found in Improved Atrophic Mucosa over Time from Successful <b><i>Helicobacter pylori</i></b> Eradication 2017 ·Digestion ·Atsushi Majima, Osamu Handa, Yuji Naito, Osamu Dohi, Tetsuya Okayama, Naohisa Yoshida, Kazuhiro Kamada, Kazuhiro Katada, Kazuhiko Uchiyama, Takeshi Ishikawa, Tomohisa Takagi, Hideyuki Konishi, Nobuaki Yagi, Yoshito Itoh	23
8	The JAK/STAT pathway is involved in the upregulation of PD-L1 expression in pancreatic cancer cell lines 2017 ·Oncology Reports ·Toshifumi Doi, Takeshi Ishikawa, Tetsuya Okayama, Kaname Oka, Katsura Mizushima, Tomoyo Yasuda, Naoyuki Sakamoto, Kazuhiro Katada, Kazuhiro Kamada, Kazuhiko Uchiyama, Osamu Handa, Tomohisa Takagi, Yuji Naito, Yoshito Itoh	117
9	Linked color imaging improves endoscopic diagnosis of active Helicobacter pylori infection 2016 ·SHILAP Revista de lepidopterología ·Osamu Dohi, Nobuaki Yagi, Yuriko Onozawa, (unknown), Atsushi Majima, Tomoko Kitaichi, Yusuke Horii, Kentaro Suzuki, Akira Tomie, Tetsuya Okayama, Naohisa Yoshida, Kazuhiro Kamada, Kazuhiro Katada, Kazuhiko Uchiyama, Takeshi Ishikawa, Tomohisa Takagi, Osamu Handa, Hideyuki Konishi, Yuji Naito, Yoshito Itoh	87
10	Mo1328 What Is the Best Choice of Image-Enhanced Laser Endoscopy for Early Gastric Cancer?: A Gastroscopy Video Evaluation Study 2016 ·Gastrointestinal Endoscopy ·Osamu Dohi, N. Iwai, Tomohiro Ueda, Atsushi Majima, Yusuke Horii, Tomoko Kitaichi, Yuriko Onozawa, Tetsuya Okayama, Naohisa Yoshida, Kazuhiro Kamada, Kazuhiko Uchiyama, Takeshi Ishikawa, Osamu Handa, Hideyuki Konishi, Yuji Naito, Yoshito Itoh	0
11	Serum metabolomics analysis for early detection of colorectal cancer 2016 ·Journal of Gastroenterology ·Kazuhiko Uchiyama, Nobuaki Yagi, Katsura Mizushima, Yasuki Higashimura, Yasuko Hirai, Tetsuya Okayama, Naohisa Yoshida, Kazuhiro Katada, Kazuhiro Kamada, Osamu Handa, Takeshi Ishikawa, Tomohisa Takagi, Hideyuki Konishi, Yoshiaki Kuriu, Masayoshi Nakanishi, Eigo Otsuji, Yoshito Itoh, Yuji Naito	83
12	Difficult Manipulation is One of the Risk Factors for IncompleteResection in Colorectal Endoscopic Submucosal Dissection 2016 ·Journal of Gastroenterology and Hepatology Research ·Naohisa Yoshida, (unknown), Takaaki Murakami, Ryohei Hirose, Kiyoshi Ogiso, Yutaka Inada, Osamu Dohi, Tetsuya Okayama, Kazuhiro Kamada, Kazuhiko Uchiyama, Takeshi Ishikawa, Osamu Handa, Hideyuki Konishi, Yuji Naito, Akio Yanagisawa, Yoshito Itoh	5
13	The amino acid-rich elemental diet Elental® preserves lean body mass during chemo- or chemoradiotherapy for esophageal cancer 2016 ·Oncology Reports ·Takeshi Ishikawa, Tomoyo Yasuda, Toshifumi Doi, Tetsuya Okayama, Naoyuki Sakamoto, Yasuyuki Gen, Osamu Dohi, Naohisa Yoshida, Kazuhiro Kamada, Kazuhiko Uchiyama, Osamu Handa, Tomohisa Takagi, Hideyuki Konishi, Nobuaki Yagi, Satoshi Kokura, Yuji Naito, Yoshito Itoh	29
14	The inhibitory effect of heat treatment against epithelial-mesenchymal transition (EMT) in human pancreatic adenocarcinoma cell lines 2014 ·Journal of Clinical Biochemistry and Nutrition ·(unknown), Takeshi Ishikawa, Satoshi Kokura, Katsura Mizushima, Satoko Adachi, (unknown), (unknown), Tetsuya Okayama, Naoyuki Sakamoto, Kazuhiro Katada, Kazuhiro Kamada, Kazuhiko Uchiyama, Osamu Handa, Tomohisa Takagi, Nobuaki Yagi, Yuji Naito, Yoshito Itoh	14
15	New Genetic Biomarkers Predicting Azathioprine Blood Concentrations in Combination Therapy with 5-Aminosalicylic Acid 2014 ·PLoS ONE ·Kazuhiko Uchiyama, Tomohisa Takagi, (unknown), Norihiko Kondo, Tetsuya Okayama, Naohisa Yoshida, Kazuhiro Kamada, Kazuhiro Katada, Osamu Handa, Takeshi Ishikawa, Hiroaki Yasuda, Junichi Sakagami, Hideyuki Konishi, Nobuaki Yagi, Yuji Naito, Yoshito Itoh	8
16	Gene expression profiles of diabetic mice treated with whole body hyperthermia: A high-density DNA microarray analysis 2010 ·International Journal of Hyperthermia ·Satoshi Kokura, Satoko Adachi, Katsura Mizushima, Tetsuya Okayama, Takeshi Hattori, (unknown), Nami Nakabe, (unknown), Takeshi Ishikawa, Osamu Handa, Tomohisa Takagi, Yuji Naito, Toshikazu Yoshikawa	8
17	Heat-Shock Protein 70-Overexpressing Gastric Epithelial Cells Are Resistant to Indomethacin-Induced Apoptosis 2009 ·Digestion ·Ikuhiro Hirata, Yuji Naito, Osamu Handa, Natsuko Hayashi, Katsura Mizushima, Satoko Adachi, Tatsushi Omatsu, Tetsuya Okayama, (unknown), Hiroshi Ichikawa, Tomohisa Takagi, Satoshi Kokura, Michiro Otaka, Toshikazu Yoshikawa	25
18	Mast cells are involved in the pathogenesis of indomethacin-induced rat enteritis 2009 ·Journal of Gastroenterology ·Tetsuya Okayama, Norimasa Yoshida, Kazuhiko Uchiyama, Tomohisa Takagi, Hiroshi Ichikawa, Toshikazu Yoshikawa	13
19	Increased intestinal expression of heme oxygenase‐1 and its localization in patients with ulcerative colitis 2008 ·Journal of Gastroenterology and Hepatology ·Tomohisa Takagi, Yuji Naito, Katsura Mizushima, (unknown), Hitomi Okada, Takahiro Suzuki, Ikuhiro Hirata, Tatsushi Omatsu, Tetsuya Okayama, Osamu Handa, Satoshi Kokura, Hiroshi Ichikawa, Toshikazu Yoshikawa	46
20	Antitumor effect of whole body hyperthermia with α -galactosylceramide in a subcutaneous tumor model of colon cancer 2007 ·International Journal of Hyperthermia ·Takeshi Hattori, Satoshi Kokura, (unknown), Tetsuya Okayama, Tomohisa Takagi, Osamu Handa, Yuji Naito, Norimasa Yoshida, Toshikazu Yoshikawa	14

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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