Hitoshi Nishiyama

24 papers and 1.0k indexed citations i.

About

Hitoshi Nishiyama is a scholar working on Pulmonary and Respiratory Medicine, Gastroenterology and Surgery. According to data from OpenAlex, Hitoshi Nishiyama has authored 24 papers receiving a total of 1.0k indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Pulmonary and Respiratory Medicine, 12 papers in Gastroenterology and 6 papers in Surgery. Recurrent topics in Hitoshi Nishiyama’s work include Gastric Cancer Management and Outcomes (14 papers), Metastasis and carcinoma case studies (9 papers) and Gastrointestinal Tumor Research and Treatment (9 papers). Hitoshi Nishiyama is often cited by papers focused on Gastric Cancer Management and Outcomes (14 papers), Metastasis and carcinoma case studies (9 papers) and Gastrointestinal Tumor Research and Treatment (9 papers). Hitoshi Nishiyama collaborates with scholars based in Japan and United States. Hitoshi Nishiyama's co-authors include Saburo Shikuwa, Hajime Isomoto, Naoyuki Yamaguchi, Ken Ohnita, Kazuhiko Nakao, Shigeru Kohno, Eiichiro Fukuda, Tomayoshi Hayashi, Fuminao Takeshima and Toshiyuki Nakayama and has published in prestigious journals such as Phytochemistry, Gastrointestinal Endoscopy and Diseases of the Colon & Rectum.

In The Last Decade

Co-authorship network of co-authors of Hitoshi Nishiyama i

Fields of papers citing papers by Hitoshi Nishiyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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.

Countries citing papers authored by Hitoshi Nishiyama

Since Specialization
Citations

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).

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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2025