Hitoshi Nishiyama
- Gastroenterology top 1%
- Gastrointestinal Tumor Research and Treatment 9
- Gastroesophageal reflux and treatments 2
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- Gastric Cancer Management and Outcomes 14
- Metastasis and carcinoma case studies 9
- Surgery top 5%
- Esophageal Cancer Research and Treatment 3
- Esophageal and GI Pathology 3
- Helicobacter pylori-related gastroenterology studies 2
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- Neuroendocrine Tumor Research Advances 1
Hitoshi Nishiyama
22 papers receiving 1.0k citations
Peers
Comparison fields: 5 of 62
- Gastroenterology 345
- Pulmonary and Respiratory Medicine 836
- Surgery 626
- Oncology 118
- Speech and Hearing 24
Countries citing papers authored by Hitoshi Nishiyama
This map shows the geographic impact of Hitoshi Nishiyama'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 Hitoshi Nishiyama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hitoshi Nishiyama more than expected).
Fields of papers citing papers by Hitoshi Nishiyama
This network shows the impact of papers produced by Hitoshi Nishiyama. 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 Hitoshi Nishiyama. The network helps show where Hitoshi Nishiyama may publish in the future.
Co-authorship network
The 25 scholars most cited alongside Hitoshi Nishiyama, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
| # | Work | ||
|---|---|---|---|
| 1 | 2019 | 0 | |
| 2 | 2014 | 35 | |
| 3 | 2011 | 15 | |
| 4 | 2011 | 246 | |
| 5 | 2011 | 119 | |
| 6 | 2010 | 41 | |
| 7 | 2010 | 40 | |
| 8 | 2010 | 72 | |
| 9 | 2009 | 31 | |
| 10 | 2009 | 7 | |
| 11 | 2009 | 82 | |
| 12 | 2009 | 44 | |
| 13 | 2008 | 38 | |
| 14 | 2006 | 19 | |
| 15 | 2004 | 8 | |
| 16 | 2004 | 1 | |
| 17 | 2003 | 26 | |
| 18 | 2003 | 21 | |
| 19 | 2000 | 0 | |
| 20 | 1992 | 1 |
About Hitoshi Nishiyama
Hitoshi Nishiyama is a scholar working on Gastroenterology, Pulmonary and Respiratory Medicine and Periodontics, having authored 24 papers that have together received 1.0k indexed citations. Recurring topics across this work include Gastric Cancer Management and Outcomes (14 papers), Metastasis and carcinoma case studies (9 papers), Gastrointestinal Tumor Research and Treatment (9 papers), Esophageal Cancer Research and Treatment (3 papers), Esophageal and GI Pathology (3 papers), Gastroesophageal reflux and treatments (2 papers), Helicobacter pylori-related gastroenterology studies (2 papers) and Neuroendocrine Tumor Research Advances (1 paper). The work is most often cited by research in Gastroenterology (345 citations), Pulmonary and Respiratory Medicine (836 citations) and Surgery (626 citations). Hitoshi Nishiyama has collaborated with scholars based in Japan and United States. Frequent co-authors include Saburo Shikuwa, Hajime Isomoto, Ken Ohnita, Naoyuki Yamaguchi, Kazuhiko Nakao, Shigeru Kohno, Eiichiro Fukuda, Tomayoshi Hayashi, Fuminao Takeshima and Toshiyuki Nakayama. Their work appears in journals such as Phytochemistry, Gastrointestinal Endoscopy and Diseases of the Colon & Rectum.
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.