Ken Ohnita

4.7k total citations · 1 hit paper
123 papers, 2.9k citations indexed

About

Ken Ohnita is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Gastroenterology. According to data from OpenAlex, Ken Ohnita has authored 123 papers receiving a total of 2.9k indexed citations (citations by other indexed papers that have themselves been cited), including 56 papers in Surgery, 51 papers in Pulmonary and Respiratory Medicine and 40 papers in Gastroenterology. Recurrent topics in Ken Ohnita's work include Gastric Cancer Management and Outcomes (35 papers), Gastrointestinal Tumor Research and Treatment (26 papers) and Metastasis and carcinoma case studies (21 papers). Ken Ohnita is often cited by papers focused on Gastric Cancer Management and Outcomes (35 papers), Gastrointestinal Tumor Research and Treatment (26 papers) and Metastasis and carcinoma case studies (21 papers). Ken Ohnita collaborates with scholars based in Japan, United States and Egypt. Ken Ohnita's co-authors include Hajime Isomoto, Naoyuki Yamaguchi, Saburo Shikuwa, Kazuhiko Nakao, Fuminao Takeshima, Yohei Mizuta, Shigeru Kohno, Eiichiro Fukuda, S Kohno and Hitoshi Nishiyama and has published in prestigious journals such as SHILAP Revista de lepidopterología, Gastroenterology and PLoS ONE.

In The Last Decade

Ken Ohnita

120 papers receiving 2.8k 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.

Endoscopic submucosal dissection for early gastric cancer: a large-scale feasibility study

2008 526 citations Hajime Isomoto, Saburo Shikuwa et al. profile →

Peers

Countries citing papers authored by Ken Ohnita

Since Specialization

Citations

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

Fields of papers citing papers by Ken Ohnita

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ken Ohnita

This figure shows the co-authorship network connecting the top 25 collaborators of Ken Ohnita. A scholar is included among the top collaborators of Ken Ohnita 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 Ken Ohnita. Ken Ohnita 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	The C/C Genotype of rs1231760 in RGS2 Is a Risk Factor for the Progression of H. pylori-Positive Atrophic Gastritis by Increasing RGS2 Expression 2024 ·Diagnostics ·Naoyuki Yamaguchi, (unknown), Jingjing Wei, (unknown), Tatsuo Inamine, Daisuke Fukuda, Ken Ohnita, Tatsuro Hirayama, Hajime Isomoto, Kayoko Matsushima, Kazuhiro Tsukamoto	1
2	Polymorphism in autophagy-related genes LRP1 and CAPZA1 may promote gastric mucosal atrophy 2023 ·Genes and Environment ·Naoyuki Yamaguchi, (unknown), Hajime Isomoto, Tatsuo Inamine, (unknown), Daisuke Fukuda, Ken Ohnita, Tsutomu Kanda, Kayoko Matsushima, Tatsuro Hirayama, Kazuo Yashima, Kazuhiro Tsukamoto	4
3	‘Underwater endoscopic mucosal resection with submucosal injection and marking’ for superficial non-ampullary duodenal epithelial tumors to achieve R0 resection: a single-center case series 2023 ·Scandinavian Journal of Gastroenterology ·(unknown), Naoyuki Yamaguchi, (unknown), (unknown), (unknown), (unknown), (unknown), Kayoko Matsushima, Yuko Akazawa, Ken Ohnita, Kazuhiko Nakao	4
4	Esophageal metastasis of renal cell carcinoma resected by endoscopic submucosal dissection: a case report 2021 ·BMC Gastroenterology ·Ken Ohnita, (unknown), Satoshi Hirai, (unknown), (unknown), (unknown), Kenichiro Inoue, (unknown), Masahiro Nakashima, Kazuhiko Nakao	4
5	Recurrence Patterns and Outcomes of Salvage Surgery in Cases of Non-Curative Endoscopic Submucosal Dissection without Additional Radical Surgery for Early Gastric Cancer 2018 ·Digestion ·Kohei Takizawa, Waku Hatta, Takuji Gotoda, Noboru Kawata, Masahiro Nakagawa, Akiko Takahashi, Mitsuru Esaki, Akira Mitoro, Shinya Yamada, Keiko Tanaka, Mitsuru Matsuda, Jun Takada, Shiro Oka, Hirotaka Ito, Ken Ohnita, Ryo Shimoda, Shu Hoteya, Tsuneo Oyama, Tooru Shimosegawa	17
6	Expression of coproporphyrinogen oxidase is associated with detection of upper gastrointestinal carcinomas by 5-aminolevulinic acid-mediated photodynamic diagnosis 2017 ·Photodiagnosis and Photodynamic Therapy ·(unknown), Hajime Isomoto, Hiroki Kurumi, Tsutomu Kanda, Mikiko Hashisako, Kazuhiro Tabata, Hiroyuki Ishii, Ken Ohnita, Naoyuki Yamaguchi, Yuko Akazawa, Kayoko Matsushima, Fuminao Takeshima, Masaki Kunizaki, Shigekazu Hidaka, Atsushi Nanashima, Junya Fukuoka, Takeshi Nagayasu, Kazuhiko Nakao	7
7	A case of IgG4-related disease presenting with multiple gastric submucosal tumors 2017 ·Gastrointestinal Endoscopy ·(unknown), Eisuke Ozawa, Ken Ohnita, Kuniko Abe, Kazuhiko Nakao	6
8	BH3-only protein Bim is associated with the degree of Helicobacter pylori-induced gastritis and is localized to the mitochondria of inflammatory cells in the gastric mucosa 2015 ·International Journal of Medical Microbiology ·Yuko Akazawa, Katsuya Matsuda, Hajime Isomoto, Kayoko Matsushima, (unknown), (unknown), (unknown), Ken Ohnita, Fuminao Takeshima, Hisayoshi Kondo, Hitoshi Tsugawa, Hidekazu Suzuki, Joel Moss, Kazuhiko Nakao, Masahiro Nakashima	2
9	Endoplasmic Reticulum Stress Contributes to Helicobacter Pylori VacA-Induced Apoptosis 2013 ·PLoS ONE ·Yuko Akazawa, Hajime Isomoto, Kayoko Matsushima, Tsutomu Kanda, Hitomi Minami, (unknown), Naota Taura, Ken Shiozawa, Ken Ohnita, Fuminao Takeshima, Masayuki Nakano, Joel Moss, Toshiya Hirayama, Kazuhiko Nakao	65
10	Gastrointestinal: Gastric mucosa‐associated lymphoid tissue (MALT) lymphoma observed by magnifying endoscopy with narrow band imaging 2012 ·Journal of Gastroenterology and Hepatology ·(unknown), Eiichiro Fukuda, Takuji Yamao, Daisuke Niino, (unknown), Eisuke Ozawa, Yasushi Sawayama, Yukiyoshi Moriuchi, Ken Ohnita, Hajime Isomoto, Fuminao Takeshima, Kazuwa Nakao	4
11	Gastric involvement by mantle cell lymphoma observed by magnified endoscopy with narrow-band imaging 2012 ·Gastrointestinal Endoscopy ·(unknown), Hajime Isomoto, Kunihiro Tsukasaki, Daisuke Niino, Kayoko Matsushima, Yuko Akazawa, Naoyuki Yamaguchi, Ken Ohnita, Saburo Shikuwa, Fuminao Takeshima, Kazuhiko Nakao	4
12	Duodenal involvement of mantle cell lymphoma observed by magnified endoscopy with narrow-band imaging 2012 ·Gastrointestinal Endoscopy ·(unknown), Hajime Isomoto, Daisuke Niino, Kayoko Matsushima, Yuko Akazawa, Naoyuki Yamaguchi, Ken Ohnita, Saburo Shikuwa, Yoshitaka Imaizumi, Kunihiro Tsukasaki, Yasushi Miyazaki, Fuminao Takeshima, Kazuhiko Nakao	2
13	A Case of Penetration of the Colon by a Toothpick Successfully Removed during Colonoscopy 2011 ·Nihon Daicho Komonbyo Gakkai Zasshi ·Masanori Fukushima, (unknown), Koki Ikeda, (unknown), Ken Ohnita, Hajime Isomoto, Fuminao Takeshima, Kazuhiko Nakao	1
14	Endoscopic Submucosal Dissection for Colorectal Epithelial Neoplasms 2010 ·Diseases of the Colon & Rectum ·Hitoshi Nishiyama, Hajime Isomoto, Naoyuki Yamaguchi, Eiichiro Fukuda, (unknown), Ken Ohnita, Yohei Mizuta, Takashi Nakamura, Kazuhiko Nakao, Shigeru Kohno, Saburo Shikuwa	41
15	Factors related to the curability of early gastric cancer with endoscopic submucosal dissection 2009 ·Surgical Endoscopy ·Ken Ohnita, Hajime Isomoto, Naoyuki Yamaguchi, Eiichiro Fukuda, Takashi Nakamura, Hitoshi Nishiyama, Yohei Mizuta, Motohisa Akiyama, Kazuhiko Nakao, Shigeru Kohno, Saburo Shikuwa	31
16	An admixture type of hyperplastic polyp at the esophagogastric junction 2008 ·Endoscopy ·Toshiaki Hayashi, Saburo Shikuwa, Hiroharu Isomoto, Nobuo Yamaguchi, Ken Ohnita, Naonori Inoue, (unknown), Eiichiro Fukuda, (unknown), S Kohno	1
17	Relation Among Plasma Ghrelin Level, Gastric Emptying, and Psychologic Condition in Patients With Functional Dyspepsia 2007 ·Journal of Clinical Gastroenterology ·(unknown), Yohei Mizuta, Fuminao Takeshima, Yuko Akazawa, Hajime Isomoto, Ken Ohnita, Kazuo Ohba, Katsuhisa Omagari, Saburo Shikuwa, Shigeru Kohno	42
18	Circulating Ghrelin Levels in Patients with Various Upper Gastrointestinal Diseases 2005 ·Digestive Diseases and Sciences ·Hajime Isomoto, Hiroaki Ueno, Yoshito Nishi, Toru Yasutake, Kenji Tanaka, Naoko Kawano, Ken Ohnita, Yohei Mizuta, Kenichiro Inoue, Masamitsu Nakazato, Shigeru Kohno	55
19	Does the diagnosis of primary biliary cirrhosis or autoimmune cholangitis depend on the ‘phase’ of the disease? 2005 ·Liver International ·Yoshiko Kadokawa, Katsuhisa Omagari, Kazuo Ohba, Junichi Masuda, Hiroaki Hazama, Hideki Kinoshita, Ken Ohnita, Yohei Mizuta, (unknown), (unknown), Shigeru Kohno	8
20	Adult T-cell leukemia with an unusual esophageal lesion 2001 ·Gastrointestinal Endoscopy ·Hajime Isomoto, Ken Ohnita, (unknown), Takahiro Maeda, Katsuhisa Omagari, Masanobu Miyazaki, Kunihiko Murase, Kazuhisa Hasui, Ikuo Murata, (unknown)	2

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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