Akihiko Okada

2.4k total citations
104 papers, 1.8k citations indexed

About

Akihiko Okada is a scholar working on Surgery, Gastroenterology and Astronomy and Astrophysics. According to data from OpenAlex, Akihiko Okada has authored 104 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 38 papers in Surgery, 20 papers in Gastroenterology and 15 papers in Astronomy and Astrophysics. Recurrent topics in Akihiko Okada's work include Helicobacter pylori-related gastroenterology studies (18 papers), Astro and Planetary Science (15 papers) and Gastroesophageal reflux and treatments (14 papers). Akihiko Okada is often cited by papers focused on Helicobacter pylori-related gastroenterology studies (18 papers), Astro and Planetary Science (15 papers) and Gastroesophageal reflux and treatments (14 papers). Akihiko Okada collaborates with scholars based in Japan, United States and United Kingdom. Akihiko Okada's co-authors include Cong‐Qiang Liu, Sadayo Yabuki, Akimasa Masuda, Fan Zili, Kaori Wakamatsu, Tsutomu Higashijima, Tatsuo Miyazawa, T Maekawa, Klaus Keil and G. J. Taylor and has published in prestigious journals such as Nature, SHILAP Revista de lepidopterología and Gastroenterology.

In The Last Decade

Akihiko Okada

100 papers receiving 1.8k citations

Peers

Akihiko Okada

SURGE

GASTR

Zhibing Wang China

Yosuke Hoshino Germany

P.K. Malhotra India

Karl‐Heinz Schmidt Germany

Matthias Ebert Germany

Klaus Weber Germany

Masashi Kodama Japan

David W. Clark United States

Petr Vítek Czechia

John B. Hunt United Kingdom

Zhibing Wang China

Akihiko Okada

200 ×0.4

SURGE

269 ×0.6

146 ×0.5

46 ×0.2

GASTR

14 ×0.1

Citations per year, relative to Akihiko Okada Akihiko Okada (= 1×) peers Zhibing Wang

Countries citing papers authored by Akihiko Okada

Since Specialization

Citations

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

Fields of papers citing papers by Akihiko Okada

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Akihiko Okada

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

Ogura, Takeshi, Takaaki Eguchi, Kazunari Nakahara, et al.. (2021). Clinical impact of recombinant thrombomodulin administration on disseminated intravascular coagulation due to severe acute cholangitis (Recover‐AC study). Journal of Hepato-Biliary-Pancreatic Sciences. 30(2). 221–228. 5 indexed citations

Yoshizaki, Tetsuya, et al.. (2020). Propensity score matching analysis: incidence and risk factors for “stardust” gastric mucosa, a novel gastric finding potentially induced by vonoprazan. Alimentary Pharmacology & Therapeutics. 53(1). 94–102. 14 indexed citations

Fujita, Tsuyoshi, Masao Kobayashi, Yukinao Yamazaki, et al.. (2018). Factors associated with the presentation of erosive esophagitis symptoms in health checkup subjects: A prospective, multicenter cohort study. PLoS ONE. 13(5). e0196848–e0196848. 10 indexed citations

Tsujimae, Masahiro, Hiroshi Yamashita, Akio Koizumi, et al.. (2016). A Comparative Study of a New Class of Gastric Acid Suppressant Agent Named Vonoparazan versus Esomeprazole for the Eradication of Helicobacter pylori. Digestion. 94(4). 240–246. 41 indexed citations

Eguchi, Takaaki, Yoshihisa Tsuji, Hiroshi Yamashita, et al.. (2015). Efficacy of recombinant human soluble thrombomodulin in preventing walled-off necrosis in severe acute pancreatitis patients. Pancreatology. 15(5). 485–490. 17 indexed citations

Wada, Masaya, Yoshihiro Okabe, Shuji Yamamoto, et al.. (2006). A CASE OF ACINAR CELL CARCINOMA OF THE PANCREAS WITH INTRADUCTAL GROWTH DIAGNOSED BY ENDOSCOPIC ULTRASOUND-GUIDED FINE NEEDLE ASPIRATION BIOPSY. Acta gastro-enterologica belgica. 48(7). 1460–1467. 1 indexed citations

Matsushima, Yumi, Yoshikazu Kinoshita, Hirokazu Fukui, et al.. (2002). Immunological and molecular analysis of B lymphocytes in low-grade MALT lymphoma of the stomach. Are there any useful markers for predicting outcome after Helicobacter pylori eradication?. Journal of Gastroenterology. 37(6). 428–433. 13 indexed citations

Matsushima, Yumi, Yoshikazu Kinoshita, Makoto Watanabe, et al.. (1999). Augmentation of Water-Immersion Stress- Induced Gastric Mucosal Lesions in BALB/c Mice Infected with <i>Helicobacter felis</i>. Digestion. 60(1). 34–40. 11 indexed citations

Hassan, Sazzad, Yoshikazu Kinoshita, Chiharu Kawanami, et al.. (1998). Expression of Protooncogene c-kit and Its Ligand Stem Cell Factor (SCF) in Gastric Carcinoma Cell Lines. Digestive Diseases and Sciences. 43(1). 8–14. 40 indexed citations

10.

Fukui, Hiroshi, Yoshikazu Kinoshita, Takuji Maekawa, et al.. (1998). Reg protein may mediate gastrin-induced gastric mucosal cell proliferation in rat. Digestive Diseases and Sciences. 43(8). 1860. 1 indexed citations

11.

Fukui, Hirokazu, et al.. (1998). Regenerating gene protein may mediate gastric mucosal proliferation induced by hypergastrinemia in rats. Gastroenterology. 115(6). 1483–1493. 158 indexed citations

12.

Maekawa, T, Yoshikazu Kinoshita, Yumi Matsushima, et al.. (1997). Helicobacter pylori induces proinflammatory cytokines and major histocompatibility complex class II antigen in mouse gastric epithelial cells. Journal of Laboratory and Clinical Medicine. 130(4). 442–449. 19 indexed citations

13.

Nakata, Hirohisa, Yoshikazu Kinoshita, Kiyohiko Kishi, et al.. (1996). Involvement of β-Adrenergic Receptor Kinase-1 in Homologous Desensitization of Histamine H<sub>2</sub> Receptors in Human Gastric Carcinoma Cell Line MKN-45. Digestion. 57(6). 406–410. 15 indexed citations

14.

Shima, Masako, Akihiko Okada, & Keisuke Nagao. (1993). The chondrite Mihonoseki: New observed fall. 1297.

15.

Taylor, G. J., K. Keil, H. E. Newsom, & Akihiko Okada. (1988). Magmatism and Impact on the Aubrite Parent Body: Evidence from the Norton County Enstatite Achondrite. Lunar and Planetary Science Conference. 19. 1185. 4 indexed citations

16.

Taylor, G. J., Akihiko Okada, E. R. D. Scott, et al.. (1981). The Occurrence and Implications of Carbide-Magnetite Assemblages in Unequilibrated Ordinary Chondrites. Lunar and Planetary Science Conference. 1076–1078. 40 indexed citations

17.

Scott, E. R. D., G. J. Taylor, Alan E. Rubin, et al.. (1981). Graphite - Magnetite Inclusions in Ordinary Chondrites: an Important Constituent in the Early Solar System. LPI. 955–957. 1 indexed citations

18.

Okada, Akihiko & Klaus Keil. (1981). Caswellsilverite, NaCrS 2 , a New Mineral in the Norton County Enstatite Achondrite. Meteoritics and Planetary Science. 16. 132–136. 24 indexed citations

19.

Yagi, Kenzô, J. F. Lovering, Makoto Shima, & Akihiko Okada. (1978). Mineralogical and Petrographical Studies of the Yamato Meteorites, Yamato-7301(j), -7305(k), -7308(l) and -7303(m) from Antarctica. Memoirs of National Institute of Polar Research. Special issue. 8. 121–141. 8 indexed citations

20.

Okada, Akihiko. (1975). Petrological Studies of the Yamato Meteorites Part1. Mineralogy of the Yamato Meteorites. Memoirs of National Institute of Polar Research. Special issue. 5. 14–66. 12 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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