Ryo Ashida

2.7k total citations
195 papers, 1.8k citations indexed

About

Ryo Ashida is a scholar working on Oncology, Surgery and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Ryo Ashida has authored 195 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 120 papers in Oncology, 114 papers in Surgery and 90 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Ryo Ashida's work include Pancreatic and Hepatic Oncology Research (96 papers), Cholangiocarcinoma and Gallbladder Cancer Studies (62 papers) and Gallbladder and Bile Duct Disorders (44 papers). Ryo Ashida is often cited by papers focused on Pancreatic and Hepatic Oncology Research (96 papers), Cholangiocarcinoma and Gallbladder Cancer Studies (62 papers) and Gallbladder and Bile Duct Disorders (44 papers). Ryo Ashida collaborates with scholars based in Japan, Germany and Italy. Ryo Ashida's co-authors include Katsuhiko Uesaka, Teiichi Sugiura, Yukiyasu Okamura, Takaaki Ito, Yusuke Yamamoto, Katsuhisa Ohgi, Takeshi Aramaki, Keita Mori, Takaaki Ito and Mihoko Yamada and has published in prestigious journals such as Journal of Clinical Oncology, SHILAP Revista de lepidopterología and Annals of Surgery.

In The Last Decade

Ryo Ashida

172 papers receiving 1.8k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Ryo Ashida Japan	22	1.0k	812	641	361	357	195	1.8k
Stephen W. Fenwick United Kingdom	28	1.2k 1.2×	1.0k 1.2×	641 1.0×	1.0k 2.8×	236 0.7×	88	2.2k
Koji Murono Japan	26	1.3k 1.3×	908 1.1×	552 0.9×	131 0.4×	261 0.7×	209	2.2k
Elliot Newman United States	26	723 0.7×	818 1.0×	571 0.9×	103 0.3×	214 0.6×	91	1.9k
Guido Alberto Massimo Tiberio Italy	29	344 0.3×	1.3k 1.6×	770 1.2×	612 1.7×	405 1.1×	87	2.8k
Tetsuro Ishikawa Japan	25	763 0.7×	514 0.6×	269 0.4×	199 0.6×	283 0.8×	136	2.0k
Christian Scheuba Austria	33	492 0.5×	1.4k 1.7×	283 0.4×	158 0.4×	538 1.5×	114	2.7k
Hideo Baba Japan	27	1.2k 1.1×	1.6k 2.0×	1.3k 2.0×	215 0.6×	234 0.7×	128	2.8k
Masaru Miyazaki Japan	26	674 0.7×	881 1.1×	339 0.5×	258 0.7×	212 0.6×	163	1.9k
Soichiro Morinaga Japan	22	1.6k 1.6×	852 1.0×	810 1.3×	165 0.5×	465 1.3×	162	2.4k
Ki Mun Kang South Korea	20	501 0.5×	347 0.4×	413 0.6×	288 0.8×	122 0.3×	71	1.4k

Countries citing papers authored by Ryo Ashida

Since Specialization

Citations

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

Fields of papers citing papers by Ryo Ashida

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ryo Ashida

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

All Works

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20 of 20 papers shown

Kato, Yoshiyasu, Ryo Ashida, Katsuhisa Ohgi, et al.. (2025). Efficacy of Neoadjuvant Therapy for Resectable Pancreatic Cancer Might be Limited to Biologically Borderline Resectable Cases. Pancreas. 54(7). e630–e636.

Otsuka, Shimpei, Ryo Ashida, Katsuhisa Ohgi, et al.. (2025). Prognostic Impact of Diabetes Mellitus and Extended Hepatectomy on Perihilar Cholangiocarcinoma. Annals of Surgery Open. 6(1). e552–e552. 1 indexed citations

Hirata, Yusuke, et al.. (2024). Industrially produced <i>trans</i>-fatty acids are potent promoters of DNA damage-induced apoptosis. The Journal of Toxicological Sciences. 49(1). 27–36. 5 indexed citations

Imamura, Taisuke, Ryo Ashida, Kenichi Urakami, et al.. (2024). Comprehensive sequencing of circulating tumour DNA in resectable pancreatic cancer. British journal of surgery. 111(3). 1 indexed citations

Otsuka, Shimpei, Teiichi Sugiura, Ryo Ashida, et al.. (2024). Subdivision of pT1N0 (American Joint Committee on Cancer 8th edition) distal cholangiocarcinoma for adjuvant chemotherapy consideration. Journal of Hepato-Biliary-Pancreatic Sciences. 31(8). 559–568.

Ashida, Ryo, Katsuhisa Ohgi, Mihoko Yamada, et al.. (2024). Predictive score for identifying intrahepatic cholangiocarcinoma patients without lymph node metastasis: a basis for omitting lymph node dissection. HPB. 26(6). 800–807.

Mitsuyoshi, Takamasa, Yuka Ono, Takahiro Kishi, et al.. (2024). Acute adverse events of ultra-hypofractionated whole-breast irradiation after breast-conserving surgery for early breast cancer in Japan: an interim analysis of the multi-institutional phase II UPBEAT study. Breast Cancer. 31(4). 643–648. 2 indexed citations

Ohgi, Katsuhisa, Ryo Ashida, Mihoko Yamada, et al.. (2023). Efficacy of lymph node dissection for duodenal cancer according to the lymph node station. Annals of Gastroenterological Surgery. 8(1). 51–59. 3 indexed citations

Ashida, Ryo, Teiichi Sugiura, Katsuhisa Ohgi, et al.. (2023). Secondary Budd-Chiari syndrome occurred after adjuvant radiotherapy for perihilar cholangiocarcinoma: a case report. World Journal of Surgical Oncology. 21(1). 9–9. 1 indexed citations

10.

Ohgi, Katsuhisa, Nobuyuki Ohike, Tomoko Norose, et al.. (2023). Tumor vascularity on contrast-enhanced computed tomography as a predictive marker of metastatic potential for small nonfunctioning pancreatic neuroendocrine tumors. Surgery. 175(2). 484–490. 3 indexed citations

11.

Ashida, Ryo, Katsuhisa Ohgi, Naoki Umezaki, et al.. (2023). Acquired hemophilia A developing in the perioperative period of pancreatoduodenectomy: a report of two cases. SHILAP Revista de lepidopterología. 9(1). 75–75.

12.

Sasaki, Makoto, Mitsuhiro Nakamura, Ryo Ashida, et al.. (2023). Assessing target localization accuracy across different soft-tissue matching protocols using end-exhalation breath-hold cone-beam computed tomography in patients with pancreatic cancer. Journal of Radiation Research. 64(4). 711–719. 1 indexed citations

13.

Sugiura, Teiichi, Ryo Ashida, Katsuhisa Ohgi, et al.. (2022). Preoperative risk factors for early recurrence after resection of perihilar cholangiocarcinoma. BJS Open. 6(5). 2 indexed citations

14.

Ohgi, Katsuhisa, Teiichi Sugiura, Takaaki Ito, et al.. (2022). The prognostic impact of ABO blood type in pancreatic cancer: Relevance to adjuvant chemotherapy. Journal of Hepato-Biliary-Pancreatic Sciences. 29(8). 922–931. 3 indexed citations

15.

Ohgi, Katsuhisa, Nobuyuki Ohike, K. Tone, et al.. (2022). Clinical significance of immunocytochemical staining for peritoneal lavage cytology in pancreatic cancer. Surgery. 172(6). 1776–1781. 4 indexed citations

16.

Ashida, Ryo, Yusuke Yamamoto, Takeshi Aramaki, et al.. (2022). Preoperative skeletal muscle fat infiltration is a strong predictor of poorer survival in gallbladder cancer underwent surgery. Clinical Nutrition ESPEN. 52. 60–67. 5 indexed citations

17.

Ohgi, Katsuhisa, Teiichi Sugiura, Yukiyasu Okamura, et al.. (2021). Changes in the body composition and nutritional status after total pancreatectomy. Langenbeck s Archives of Surgery. 406(6). 1909–1916. 2 indexed citations

18.

Sasaki, Makoto, Mitsuhiro Nakamura, Tomohiro Ono, et al.. (2020). Positional repeatability and variation in internal and external markers during volumetric-modulated arc therapy under end-exhalation breath-hold conditions for pancreatic cancer patients. Journal of Radiation Research. 61(5). 755–765. 7 indexed citations

19.

Kato, Yoshiyasu, Yukiyasu Okamura, Katsuhiro Omae, et al.. (2018). Propensity score‐matched comparison of non‐anatomical resection and radiofrequency ablation for hepatocellular carcinoma in patients with up to three tumours, each measuring up to 3 cm in diameter. BJS Open. 2(4). 213–219. 2 indexed citations

20.

Ito, Takaaki, Teiichi Sugiura, Yukiyasu Okamura, et al.. (2017). The diagnostic advantage of EOB-MR imaging over CT in the detection of liver metastasis in patients with potentially resectable pancreatic cancer. Pancreatology. 17(3). 451–456. 37 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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