Ryukichi Hada

428 total citations
31 papers, 320 citations indexed

About

Ryukichi Hada is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Ryukichi Hada has authored 31 papers receiving a total of 320 indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Surgery, 15 papers in Pulmonary and Respiratory Medicine and 6 papers in Oncology. Recurrent topics in Ryukichi Hada's work include Gastric Cancer Management and Outcomes (7 papers), Pediatric Hepatobiliary Diseases and Treatments (6 papers) and Gallbladder and Bile Duct Disorders (5 papers). Ryukichi Hada is often cited by papers focused on Gastric Cancer Management and Outcomes (7 papers), Pediatric Hepatobiliary Diseases and Treatments (6 papers) and Gallbladder and Bile Duct Disorders (5 papers). Ryukichi Hada collaborates with scholars based in Japan and United Kingdom. Ryukichi Hada's co-authors include Yoshihiro Sasaki, Hideaki Nakajima, Akihiro Munakata, Keiichi Ono, Norihiro Hanabata, Tsuyotoshi Tsuji, Masanori Tanaka, Tomihisa Funyu, Chikara Οhyama and Kiyoshi Murata and has published in prestigious journals such as Gastrointestinal Endoscopy, The American Journal of Surgery and Laboratory Investigation.

In The Last Decade

Ryukichi Hada

27 papers receiving 303 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ryukichi Hada Japan 9 144 95 82 66 49 31 320
Hitomi Yamasaki Japan 7 149 1.0× 62 0.7× 35 0.4× 107 1.6× 177 3.6× 8 397
Junko Kuroda Japan 13 178 1.2× 294 3.1× 120 1.5× 86 1.3× 42 0.9× 37 510
Meng Jin China 11 158 1.1× 37 0.4× 98 1.2× 6 0.1× 73 1.5× 28 381
Tsukasa Tsunoda Japan 11 219 1.5× 131 1.4× 99 1.2× 35 0.5× 28 0.6× 47 346
Fitzgerald Pj United States 10 147 1.0× 45 0.5× 147 1.8× 9 0.1× 30 0.6× 25 270
Bernardino Rampone Italy 10 207 1.4× 154 1.6× 50 0.6× 51 0.8× 76 1.6× 21 443
Asimina Gaglia Greece 11 116 0.8× 60 0.6× 124 1.5× 76 1.2× 43 0.9× 21 333
Young Shin Chung South Korea 14 156 1.1× 35 0.4× 96 1.2× 11 0.2× 55 1.1× 34 460
Eric K. Ganguly United States 8 121 0.8× 69 0.7× 153 1.9× 71 1.1× 57 1.2× 23 332
Nobuki Ichikawa Japan 10 199 1.4× 116 1.2× 136 1.7× 57 0.9× 23 0.5× 44 335

Countries citing papers authored by Ryukichi Hada

Since Specialization
Citations

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

Fields of papers citing papers by Ryukichi Hada

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ryukichi Hada

This figure shows the co-authorship network connecting the top 25 collaborators of Ryukichi Hada. A scholar is included among the top collaborators of Ryukichi Hada 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 Ryukichi Hada. Ryukichi Hada 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.
Ishido, Keinosuke, et al.. (2010). Sonographic demonstration of wall thickness of the gallbladder in pediatric patients with pancreatico‐biliary maljunction. Journal of Hepato-Biliary-Pancreatic Sciences. 17(3). 345–348. 14 indexed citations
2.
Tsushima, Eiki, et al.. (2009). Early prediction of gait ability in patients with hip fracture. Environmental Health and Preventive Medicine. 14(3). 188–195. 4 indexed citations
3.
Funyu, Tomihisa, et al.. (2007). Carotid intima media thickness and aortic calcification index closely relate to cerebro‐ and cardiovascular disorders in hemodialysis patients. International Journal of Urology. 15(1). 48–51. 21 indexed citations
4.
5.
Hada, Ryukichi, et al.. (2007). Monitoring of hepatic artery resistance index and optimal timing of liver transplantation for biliary atresia. Journal of Medical Ultrasonics. 34(1). 11–16. 2 indexed citations
6.
Hanabata, Norihiro, Yoshihiro Sasaki, Masanori Tanaka, et al.. (2005). Vascular endothelial growth factor expression and microvessel parameters of colonic mucosa correlate with sensitivity to steroid in patients with ulcerative colitis. Scandinavian Journal of Gastroenterology. 40(2). 188–193. 7 indexed citations
7.
Sasaki, Yoshihiro, Tatsuya Mikami, Yoh Ishiguro, et al.. (2004). Disrupted peristalsis in a patient with colonic duplication and chronic constipation. Gastrointestinal Endoscopy. 59(4). 589–592. 1 indexed citations
8.
Mikami, Tatsuya, Yoshihiro Sasaki, Shinsaku Fukuda, Ryukichi Hada, & Akihiro Munakata. (2004). Computer-Aided Diagnosis of Superficial Type Early Esophageal Cancer by Image Processing on Ordinary Endoscopic Pictures. Gastrointestinal Endoscopy. 59(5). P258–P258. 1 indexed citations
9.
Murata, Kiyoshi, et al.. (2002). Adenoma of the nipple in an adolescent. Breast Cancer. 9(3). 254–256. 15 indexed citations
10.
Tsuji, Tsuyotoshi, Yoshihiro Sasaki, Masanori Tanaka, et al.. (2002). Microvessel Morphology and Vascular Endothelial Growth Factor Expression in Human Colonic Carcinoma With or Without Metastasis. Laboratory Investigation. 82(5). 555–562. 38 indexed citations
11.
Hakamada, Kenichi, et al.. (1996). Postoperative complications related to the use of a microwave tissue coagulator in hepatectomy for hepatocellular carcinoma. Journal of Microwave Surgery. 14. 83–88. 2 indexed citations
12.
Hada, Ryukichi, et al.. (1996). Difficulty in estimating localized bowel contraction by colonic manometry: a simultaneous recording of intraluminal pressure and luminal calibre. Neurogastroenterology & Motility. 8(3). 247–253. 6 indexed citations
13.
14.
Marotta, Francesco, et al.. (1989). ERCP in the assessment of patients with post-cholecystectomy syndrome: benefits and limitations.. PubMed. 35(5-6). 232–40. 4 indexed citations
15.
Hada, Ryukichi, et al.. (1988). Autopsy findings in patients with gastric cancer after gastrectomy - As correlated to surgery and recurrence.. The Japanese Journal of Gastroenterological Surgery. 21(9). 2248–2253. 1 indexed citations
16.
Ono, Keiichi & Ryukichi Hada. (1988). Ruggero oddi to commemorate the centennial of his original article—“Di una speciale disposizione a sfintere allo sbocco del coledoco”. Surgery Today. 18(4). 373–375. 7 indexed citations
17.
Hada, Ryukichi, et al.. (1987). Cavernous hemangioma of the small intestine, report of a case.. The Japanese Journal of Gastroenterological Surgery. 20(7). 1817–1820. 1 indexed citations
18.
Hada, Ryukichi, et al.. (1986). A study of perforated cases of gastic carcinoma.. The Japanese Journal of Gastroenterological Surgery. 19(11). 2280–2283. 3 indexed citations
19.
Hada, Ryukichi, et al.. (1986). Incidence of gallstone development after radical gastrectomy for gastric cancer.. The Japanese Journal of Gastroenterological Surgery. 19(5). 920–924. 2 indexed citations
20.
Hada, Ryukichi, et al.. (1979). ϱ-Shaped anastomosis: A reconstruction of the alimentary tract after total gastrectomy. The American Journal of Surgery. 137(3). 332–337. 6 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 Hitomi Yamasaki Breakdown of academic impact, for papers by Junko Kuroda Breakdown of academic impact, for papers by Meng Jin Breakdown of academic impact, for papers by Tsukasa Tsunoda Breakdown of academic impact, for papers by Fitzgerald Pj Breakdown of academic impact, for papers by Bernardino Rampone Breakdown of academic impact, for papers by Asimina Gaglia Breakdown of academic impact, for papers by Young Shin Chung Breakdown of academic impact, for papers by Eric K. Ganguly Breakdown of academic impact, for papers by Nobuki Ichikawa
Rankless by CCL
2026