Keiichi Hatamaru

62 papers and 855 indexed citations i.

About

Keiichi Hatamaru is a scholar working on Surgery, Oncology and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Keiichi Hatamaru has authored 62 papers receiving a total of 855 indexed citations (citations by other indexed papers that have themselves been cited), including 42 papers in Surgery, 37 papers in Oncology and 29 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Keiichi Hatamaru’s work include Pancreatic and Hepatic Oncology Research (35 papers), Gallbladder and Bile Duct Disorders (24 papers) and Hepatocellular Carcinoma Treatment and Prognosis (13 papers). Keiichi Hatamaru is often cited by papers focused on Pancreatic and Hepatic Oncology Research (35 papers), Gallbladder and Bile Duct Disorders (24 papers) and Hepatocellular Carcinoma Treatment and Prognosis (13 papers). Keiichi Hatamaru collaborates with scholars based in Japan. Keiichi Hatamaru's co-authors include Masayuki Kitano, Masahiro Itonaga, Takashi Tamura, Yasunobu Yamashita, Takeichi Yoshida, Yuki Kawaji, Hiroki Nishikawa, Tōru Kimura, Yukio Osaki and Ryuichi Kita and has published in prestigious journals such as Medicine, Gastrointestinal Endoscopy and World Journal of Gastroenterology.

In The Last Decade

Co-authorship network of co-authors of Keiichi Hatamaru i

Fields of papers citing papers by Keiichi Hatamaru

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Keiichi Hatamaru

Since Specialization
Citations

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