Osamu Zaha

756 total citations
14 papers, 386 citations indexed

About

Osamu Zaha is a scholar working on Parasitology, Small Animals and Immunology. According to data from OpenAlex, Osamu Zaha has authored 14 papers receiving a total of 386 indexed citations (citations by other indexed papers that have themselves been cited), including 7 papers in Parasitology, 4 papers in Small Animals and 4 papers in Immunology. Recurrent topics in Osamu Zaha's work include Parasites and Host Interactions (7 papers), T-cell and Retrovirus Studies (4 papers) and Helminth infection and control (4 papers). Osamu Zaha is often cited by papers focused on Parasites and Host Interactions (7 papers), T-cell and Retrovirus Studies (4 papers) and Helminth infection and control (4 papers). Osamu Zaha collaborates with scholars based in Japan. Osamu Zaha's co-authors include Fukunori Kinjo, Tetsuo Hirata, Atsushi Saitô, Hiroshi Fukuhara, Hiroshi Sakugawa, Jiro Fujita, Nagisa Kinjo, Akira Hokama, Ryuji Asato and Nobumi Tagaya and has published in prestigious journals such as American Journal of Tropical Medicine and Hygiene, Obesity Surgery and Journal of Gastroenterology.

In The Last Decade

Osamu Zaha

14 papers receiving 368 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Osamu Zaha Japan 9 247 127 103 87 67 14 386
Ryuji Asato Japan 10 260 1.1× 149 1.2× 73 0.7× 111 1.3× 19 0.3× 21 376
Nagisa Kinjo Japan 12 164 0.7× 73 0.6× 195 1.9× 79 0.9× 290 4.3× 24 538
Manoel Medeiros Brazil 7 294 1.2× 108 0.9× 102 1.0× 101 1.2× 24 0.4× 9 502
Nicolas Barros United States 10 181 0.7× 87 0.7× 68 0.7× 56 0.6× 45 0.7× 27 365
Joanemile P. Figueiredo Brazil 8 220 0.9× 90 0.7× 70 0.7× 75 0.9× 13 0.2× 13 354
Susumu Kiyuna Japan 9 128 0.5× 38 0.3× 132 1.3× 25 0.3× 22 0.3× 11 249
Edmund Ireri Kenya 13 508 2.1× 231 1.8× 41 0.4× 61 0.7× 26 0.4× 16 636
Mario Jiz Philippines 14 423 1.7× 244 1.9× 25 0.2× 79 0.9× 26 0.4× 29 551
B. Victor Belgium 5 160 0.6× 75 0.6× 16 0.2× 22 0.3× 158 2.4× 6 348
Willadene S. Zierdt United States 8 241 1.0× 42 0.3× 21 0.2× 45 0.5× 28 0.4× 9 314

Countries citing papers authored by Osamu Zaha

Since Specialization
Citations

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

Fields of papers citing papers by Osamu Zaha

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Osamu Zaha

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

All Works

14 of 14 papers shown
1.
Mori, Hideki, et al.. (2022). Whipple’s disease with normal duodenal histology diagnosed by ileal biopsy using balloon endoscopy. Clinical Journal of Gastroenterology. 15(4). 702–707. 2 indexed citations
2.
Tagaya, Nobumi, Kazunori Kasama, Osamu Zaha, et al.. (2007). Evaluation of the excluded stomach by double-balloon endoscopy after laparoscopic Roux-en-Y gastric bypass. Obesity Surgery. 17(9). 1165–1170. 32 indexed citations
3.
Aoyama, H, Tetsuo Hirata, Hiroshi Sakugawa, et al.. (2007). AN INVERSE RELATIONSHIP BETWEEN AUTOIMMUNE LIVER DISEASES AND STRONGYLOIDES STERCORALIS INFECTION. American Journal of Tropical Medicine and Hygiene. 76(5). 972–976. 28 indexed citations
4.
Tagaya, Nobumi, Kazunori Kasama, Osamu Zaha, et al.. (2007). Evaluation of the excluded stomach by double-balloon endoscopy after laparoscopic Roux-en-Y gastric bypass. Obesity Surgery. 17(9). 1165–1170. 2 indexed citations
5.
Hirata, Tetsuo, Osamu Zaha, Nagisa Kinjo, et al.. (2006). IMPAIRMENT OF HOST IMMUNE RESPONSE AGAINST STRONGYLOIDES STERCORALIS BY HUMAN T CELL LYMPHOTROPIC VIRUS TYPE 1 INFECTION. American Journal of Tropical Medicine and Hygiene. 74(2). 246–249. 85 indexed citations
6.
Zaha, Osamu, et al.. (2004). Comparison of anthelmintic effects of two doses of ivermectin on intestinal strongyloidiasis in patients negative or positive for anti-HTLV-1 antibody. Journal of Infection and Chemotherapy. 10(6). 348–351. 28 indexed citations
7.
Zaha, Osamu, Tetsuo Hirata, Fukunori Kinjo, Atsushi Saitô, & Hiroshi Fukuhara. (2002). Efficacy of ivermectin for chronic strongyloidiasis: two single doses given 2 weeks apart. Journal of Infection and Chemotherapy. 8(1). 94–98. 63 indexed citations
8.
Zaha, Osamu, Tetsuo Hirata, Fukunori Kinjo, & Atsushi Saitô. (2000). Strongyloidiasis-Progress in Diagnosis and Treatment.. Internal Medicine. 39(9). 695–700. 76 indexed citations
9.
Zaha, Osamu, et al.. (1997). Varioliform mucosal polypoid lesions in intestinal tract in a patient with adult T-cell leukemia. Journal of Gastroenterology. 32(4). 553–557. 6 indexed citations
10.
Zaha, Osamu, et al.. (1995). A Space-Occupying Lesion in the Liver Due to Capillaria Infection. American Journal of Tropical Medicine and Hygiene. 52(5). 414–418. 11 indexed citations
11.
Zaha, Osamu, et al.. (1994). Clinical Study on Ivermectin against 125 Strongyloidiasis Patients. Kansenshogaku zasshi. 68(1). 13–20. 33 indexed citations
12.
Zaha, Osamu, et al.. (1992). Clinical Study of Eradicated and Resistant Patients to Treatment with Ivermectin for Strongyloidiasis. Kansenshogaku zasshi. 66(7). 935–943. 7 indexed citations
13.
Zaha, Osamu, et al.. (1992). Long Term Eradication Rate of Mebendazole Therapy for Strongyloidiasis. Kansenshogaku zasshi. 66(3). 354–359. 8 indexed citations
14.
Zaha, Osamu, et al.. (1992). Clinical Study on Symptoms in Patients with Strongyloidiasis. Kansenshogaku zasshi. 66(10). 1378–1382. 5 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Ryuji Asato Breakdown of academic impact, for papers by Nagisa Kinjo Breakdown of academic impact, for papers by Manoel Medeiros Breakdown of academic impact, for papers by Nicolas Barros Breakdown of academic impact, for papers by Joanemile P. Figueiredo Breakdown of academic impact, for papers by Susumu Kiyuna Breakdown of academic impact, for papers by Edmund Ireri Breakdown of academic impact, for papers by Mario Jiz Breakdown of academic impact, for papers by B. Victor Breakdown of academic impact, for papers by Willadene S. Zierdt
Rankless by CCL
2026