Ryoichi Hamasuna

2.1k total citations
66 papers, 1.2k citations indexed

About

Ryoichi Hamasuna is a scholar working on Microbiology, Epidemiology and Surgery. According to data from OpenAlex, Ryoichi Hamasuna has authored 66 papers receiving a total of 1.2k indexed citations (citations by other indexed papers that have themselves been cited), including 35 papers in Microbiology, 25 papers in Epidemiology and 23 papers in Surgery. Recurrent topics in Ryoichi Hamasuna's work include Reproductive tract infections research (28 papers), Urinary Tract Infections Management (18 papers) and Microbial infections and disease research (14 papers). Ryoichi Hamasuna is often cited by papers focused on Reproductive tract infections research (28 papers), Urinary Tract Infections Management (18 papers) and Microbial infections and disease research (14 papers). Ryoichi Hamasuna collaborates with scholars based in Japan, Denmark and United States. Ryoichi Hamasuna's co-authors include Jørgen Skov Jensen, Yukio Osada, Sepehr N. Tabrizi, Christopher K. Fairley, Catriona S. Bradshaw, Tetsuro Matsumoto, Shingo Yamamoto, Satoshi Takahashi, Masahiro Matsumoto and Naohiro Fujimoto and has published in prestigious journals such as PLoS ONE, Clinical Infectious Diseases and Journal of Bacteriology.

In The Last Decade

Ryoichi Hamasuna

60 papers receiving 1.1k citations

Peers

Ryoichi Hamasuna
San-Pin Wang United States
Emma L. Sweeney Australia
Jennifer Danielewski Australia
Eila Linnanmäki Finland
Allan Shor South Africa
Lee Ann Campbell United States
Evelyn M. Saxon United States
Maureen Gelling United States
Ward Jones United States
Charles Rivers United States
San-Pin Wang United States
Ryoichi Hamasuna
Citations per year, relative to Ryoichi Hamasuna Ryoichi Hamasuna (= 1×) peers San-Pin Wang

Countries citing papers authored by Ryoichi Hamasuna

Since Specialization
Citations

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

Fields of papers citing papers by Ryoichi Hamasuna

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ryoichi Hamasuna

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

All Works

20 of 20 papers shown
1.
Hamasuna, Ryoichi, Mitsuru Yasuda, Satoshi Takahashi, et al.. (2021). The JAID/JSC guidelines to Clinical Management of Infectious Disease 2017 concerning male urethritis and related disorders. Journal of Infection and Chemotherapy. 27(4). 546–554. 11 indexed citations
2.
3.
Wada, Koichiro, Ryoichi Hamasuna, Takuya Sadahira, Motoo Araki, & Shingo Yamamoto. (2021). UAA-AAUS guideline for M. genitalium and non-chlamydial non-gonococcal urethritis. Journal of Infection and Chemotherapy. 27(10). 1384–1388. 4 indexed citations
4.
Hamasuna, Ryoichi, Masahiro Matsumoto, Keiichi Furubayashi, et al.. (2017). The detection of microorganisms related to urethritis from the oral cavity of male patients with urethritis. Journal of Infection and Chemotherapy. 23(10). 668–673. 7 indexed citations
5.
Tomisaki, Ikko, Ryoichi Hamasuna, & Naohiro Fujimoto. (2016). An Effective Case for Chyluria by Retroperitoneoscopic Lymphatic Disconnection. Journal of Endourology Case Reports. 2(1). 78–80.
6.
Hamasuna, Ryoichi, Midori Ogawa, Kazumasa Fukuda, et al.. (2016). The first report: An analysis of bacterial flora of the first voided urine specimens of patients with male urethritis using the 16S ribosomal RNA gene-based clone library method. Microbial Pathogenesis. 95. 95–100. 14 indexed citations
7.
Yasuda, Mitsuru, Keita Nakane, Yoshiteru Yamada, et al.. (2014). Clinical effectiveness and safety of tazobactam/piperacillin 4.5 g for the prevention of febrile infectious complication after prostate biopsy. Journal of Infection and Chemotherapy. 20(10). 631–634. 10 indexed citations
8.
Hamasuna, Ryoichi, et al.. (2013). Superior vena cava syndrome due to metastasis from urothelial cancer: A case report and literature review. Urology Annals. 5(4). 291–291. 1 indexed citations
9.
Hamasuna, Ryoichi, Hiroshi Hayami, Mitsuru Yasuda, et al.. (2012). Treatment efficacy of 3-day or 7-day administration of faropenem sodium for acute uncomplicated cystitis. International Journal of Infectious Diseases. 16. e440–e440. 1 indexed citations
10.
Matsumoto, Tetsuro, Ryoichi Hamasuna, Kiyohito Ishikawa, et al.. (2012). Sensitivities of major causative organisms isolated from patients with acute uncomplicated cystitis against various antibacterial agents: results of subanalysis based on the presence of menopause. Journal of Infection and Chemotherapy. 18(4). 597–607. 7 indexed citations
11.
Matsumoto, Tetsuro, Ryoichi Hamasuna, Kiyohito Ishikawa, et al.. (2011). Nationwide survey of antibacterial activity against clinical isolates from urinary tract infections in Japan (2008). International Journal of Antimicrobial Agents. 37(3). 210–218. 24 indexed citations
12.
Yasuda, Mitsuru, Satoshi Takahashi, Hiroshi Kiyota, et al.. (2011). Japanese guideline for clinical research of antimicrobial agents on urogenital infections: the first edition. Journal of Infection and Chemotherapy. 17(4). 579–594. 18 indexed citations
13.
Hamasuna, Ryoichi, Satoshi Takahashi, Shingo Yamamoto, et al.. (2011). Guideline for the prevention of health care‐associated infection in urological practice in Japan. International Journal of Urology. 18(7). 495–502. 8 indexed citations
14.
Yanaihara, Hitoshi, Ryoichi Hamasuna, Satoshi Takahashi, et al.. (2011). Current controversial issues in the decontamination process for urological endoscopes. International Journal of Urology. 19(1). 5–6. 2 indexed citations
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16.
Maehara, Naoki, Kazuo Chijiiwa, Kazuhiro Kondo, et al.. (2008). A Resected Case of Synchronous Quadruple Cancers Including Hepatocellular Carcinoma. The Japanese Journal of Gastroenterological Surgery. 41(12). 2041–2046.
17.
Kondo, Kazuhiro, Kazuo Chijiiwa, Motoaki Nagano, et al.. (2008). Two-stage operation for hepatocellular carcinoma with synchronous bilateral adrenal gland metastasis. Journal of Hepato-Biliary-Pancreatic Surgery. 15(2). 232–236. 1 indexed citations
18.
Kodama, Susumu, Hiroshi Itoh, Hisamitsu Ide, et al.. (1999). Carcinoembryonic Antigen and Carbohydrate Antigen 19-9-Producing Adenocarcinoma of the Prostate: Report of an Autopsy Case. Urologia Internationalis. 63(3). 193–197. 5 indexed citations
19.
Hamasuna, Ryoichi, et al.. (1996). INDICATION FOR SURGERY OF PEDIATRIC TESTICULAR AND FUNICULAR HYDROCELES IN VIEW OF NATURAL COURSE. The Japanese Journal of Urology. 87(11). 1243–1249. 1 indexed citations
20.
Yamaguchi, Takanori, Ryoichi Hamasuna, Shinichiro Kitada, Yukio Osada, & Yujiro Asada. (1990). Bilateral Pararenal Lymphatic Cysts Associated with Hypertension. Urologia Internationalis. 45(3). 190–192. 2 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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