Nobuyuki Hamajima

444 total citations
7 papers, 343 citations indexed

About

Nobuyuki Hamajima is a scholar working on Surgery, Molecular Biology and Oncology. According to data from OpenAlex, Nobuyuki Hamajima has authored 7 papers receiving a total of 343 indexed citations (citations by other indexed papers that have themselves been cited), including 2 papers in Surgery, 2 papers in Molecular Biology and 2 papers in Oncology. Recurrent topics in Nobuyuki Hamajima's work include Cancer Risks and Factors (2 papers), Helicobacter pylori-related gastroenterology studies (2 papers) and BRCA gene mutations in cancer (2 papers). Nobuyuki Hamajima is often cited by papers focused on Cancer Risks and Factors (2 papers), Helicobacter pylori-related gastroenterology studies (2 papers) and BRCA gene mutations in cancer (2 papers). Nobuyuki Hamajima collaborates with scholars based in Japan and Brazil. Nobuyuki Hamajima's co-authors include Kazuo Tajima, Manami Inoue, Kaoru Hirose, Tetsuo Kuroishi, Suketami Tominaga, Kazuo Tajima, Toshiro Takezaki, Shinkan Tokudome, Keitaro Matsuo and Manami Inoue and has published in prestigious journals such as Journal of Clinical Epidemiology, International Journal of Cancer and Nutrition and Cancer.

In The Last Decade

Nobuyuki Hamajima

7 papers receiving 333 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Nobuyuki Hamajima Japan	7	145	88	80	77	70	7	343
Tetsuo Kuroishi Japan	8	245 1.7×	98 1.1×	110 1.4×	55 0.7×	71 1.0×	9	483
Hiroko Koga Japan	9	137 0.9×	106 1.2×	68 0.8×	62 0.8×	23 0.3×	10	343
Hiroaki Hamada Japan	9	158 1.1×	150 1.7×	89 1.1×	59 0.8×	22 0.3×	18	399
A. Cats Netherlands	8	131 0.9×	46 0.5×	113 1.4×	75 1.0×	45 0.6×	17	375
Helen G. Mulholland United Kingdom	7	117 0.8×	75 0.9×	39 0.5×	104 1.4×	26 0.4×	10	327
F. Blanchet France	4	95 0.7×	62 0.7×	95 1.2×	90 1.2×	15 0.2×	8	409
Bjørn Hofstad Norway	9	259 1.8×	41 0.5×	192 2.4×	78 1.0×	34 0.5×	19	415
Jennifer Melvin Sweden	9	115 0.8×	96 1.1×	51 0.6×	64 0.8×	43 0.6×	10	304
M.–C. Boutron–Ruault France	7	118 0.8×	44 0.5×	70 0.9×	16 0.2×	46 0.7×	14	345
K. Boualga Algeria	10	96 0.7×	153 1.7×	51 0.6×	42 0.5×	140 2.0×	16	397

Countries citing papers authored by Nobuyuki Hamajima

Since Specialization

Citations

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

Fields of papers citing papers by Nobuyuki Hamajima

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Nobuyuki Hamajima

This figure shows the co-authorship network connecting the top 25 collaborators of Nobuyuki Hamajima. A scholar is included among the top collaborators of Nobuyuki Hamajima 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 Nobuyuki Hamajima. Nobuyuki Hamajima is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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7 of 7 papers shown

1.

Ito, Lucy S., Nobuyuki Hamajima, Suely Kazue Nagahashi Marie, et al.. (2001). Helicobacter pylori Seropositivity among 963 Japanese Brazilians According to Sex, Age, Generation, and Lifestyle Factors. Japanese Journal of Cancer Research. 92(11). 1150–1156. 20 indexed citations

2.

Hamajima, Nobuyuki, Keitaro Matsuo, Kazuo Tajima, et al.. (2001). Limited association between a catechol-O-methyltransferase (COMT) polymorphism and breast cancer risk in Japan. International Journal of Clinical Oncology. 6(1). 13–18. 47 indexed citations

3.

Hamajima, Nobuyuki, Keitaro Matsuo, & Hidemichi Yuasa. (2001). Adjustment of Prognostic Effects in Prevalent Case-control Studies on Genotype.. Journal of Epidemiology. 11(5). 204–210. 12 indexed citations

4.

Huang, Xin‐En, Kazuo Tajima, Nobuyuki Hamajima, et al.. (2000). Effects of Dietary, Drinking, and Smoking Habits on the Prognosis of Gastric Cancer. Nutrition and Cancer. 38(1). 30–36. 38 indexed citations

5.

Hirose, Kaoru, Kazuo Tajima, Nobuyuki Hamajima, et al.. (1999). Effect of body size on breast-cancer risk among Japanese women. International Journal of Cancer. 80(3). 349–355. 50 indexed citations

6.

Inoue, Manami, Kazuo Tajima, Kaoru Hirose, et al.. (1997). Epidemiological features of first-visit outpatients in Japan: Comparison with general population and variation by sex, age, and season. Journal of Clinical Epidemiology. 50(1). 69–77. 127 indexed citations

7.

Hamajima, Nobuyuki, et al.. (1994). Case-control studies: Matched controls or all available controls?. Journal of Clinical Epidemiology. 47(9). 971–975. 49 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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