Susumu Kunisawa

1.4k total citations
100 papers, 821 citations indexed

About

Susumu Kunisawa is a scholar working on Epidemiology, General Health Professions and Emergency Medicine. According to data from OpenAlex, Susumu Kunisawa has authored 100 papers receiving a total of 821 indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Epidemiology, 22 papers in General Health Professions and 22 papers in Emergency Medicine. Recurrent topics in Susumu Kunisawa's work include Emergency and Acute Care Studies (17 papers), COVID-19 and healthcare impacts (11 papers) and Pneumonia and Respiratory Infections (9 papers). Susumu Kunisawa is often cited by papers focused on Emergency and Acute Care Studies (17 papers), COVID-19 and healthcare impacts (11 papers) and Pneumonia and Respiratory Infections (9 papers). Susumu Kunisawa collaborates with scholars based in Japan, United Kingdom and Sweden. Susumu Kunisawa's co-authors include Yuichi Imanaka, Jung‐ho Shin, Kiyohide Fushimi, Noriko Sasaki, Daisuke Takada, Tetsuji Morishita, Hiroshi Ikai, Kazuto Yamashita, Tetsuya Otsubo and Koji Hara and has published in prestigious journals such as PLoS ONE, Scientific Reports and Journal of Clinical Epidemiology.

In The Last Decade

Susumu Kunisawa

83 papers receiving 800 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Susumu Kunisawa Japan	17	192	147	134	130	121	100	821
Shu‐Xia Li United States	17	199 1.0×	170 1.2×	149 1.1×	116 0.9×	351 2.9×	42	983
Thomas S. Valley United States	20	284 1.5×	215 1.5×	216 1.6×	135 1.0×	95 0.8×	73	1.3k
Kenshi Hayashida Japan	15	156 0.8×	141 1.0×	99 0.7×	50 0.4×	78 0.6×	65	742
De Villiers Smit Australia	17	130 0.7×	158 1.1×	360 2.7×	89 0.7×	60 0.5×	71	1.0k
Yea‐Jen Hsu United States	18	191 1.0×	278 1.9×	68 0.5×	153 1.2×	51 0.4×	75	1.1k
Christopher Chong Canada	14	413 2.2×	136 0.9×	126 0.9×	74 0.6×	84 0.7×	22	975
Juan Emilio Losa Spain	21	375 2.0×	184 1.3×	285 2.1×	74 0.6×	210 1.7×	65	1.3k
Lauren Lapointe‐Shaw Canada	19	414 2.2×	337 2.3×	142 1.1×	167 1.3×	77 0.6×	81	1.4k
Haruhisa Fukuda Japan	16	238 1.2×	154 1.0×	33 0.2×	81 0.6×	131 1.1×	126	965
Sebastian Haubitz Switzerland	19	487 2.5×	72 0.5×	192 1.4×	92 0.7×	114 0.9×	56	1.2k

Countries citing papers authored by Susumu Kunisawa

Since Specialization

Citations

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

Fields of papers citing papers by Susumu Kunisawa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Susumu Kunisawa

This figure shows the co-authorship network connecting the top 25 collaborators of Susumu Kunisawa. A scholar is included among the top collaborators of Susumu Kunisawa 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 Susumu Kunisawa. Susumu Kunisawa 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

Nagano, Hiroyuki, Susumu Kunisawa, Kiyohide Fushimi, et al.. (2025). A retrospective comparative study of percutaneous transhepatic gallbladder drainage versus endoscopic gallbladder stenting on the clinical course of acute cholecystitis: A propensity score matching analysis using a nationwide inpatient database in Japan. Journal of Hepato-Biliary-Pancreatic Sciences. 32(3). 203–211.

Asano, Shuichi, Susumu Kunisawa, & Yuichi Imanaka. (2025). Development of a new indicator of surgical burden using person-time-adjusted surgical volume: a cross-sectional regional analysis in Japan. BMJ Public Health. 3(2). e002720–e002720.

Sasaki, Noriko, et al.. (2025). Benchmarking broad-spectrum antibiotic use in older adult pneumonia inpatients: a risk-adjusted smoothed observed-to-expected ratio approach. Infection Control and Hospital Epidemiology. 46(4). 410–415.

Kunisawa, Susumu, et al.. (2025). Clinical Outcomes and Medical Costs of Hospitalized Children Requiring Daily Medical Care in Japan. Journal of Epidemiology. 35(12). 499–509.

Kishimoto, Kenji, Susumu Kunisawa, Kiyohide Fushimi, & Yuichi Imanaka. (2024). Effects of Rotavirus Vaccination Coverage among Infants on Hospital Admission for Gastroenteritis across All Age Groups, Japan, 2011–2019. Emerging infectious diseases. 30(9). 1895–1902. 1 indexed citations

Kunisawa, Susumu, et al.. (2024). Early effect of a financial incentive for surgeries within 48 h after hip fracture on the number of expedited hip fracture surgeries, in‐hospital mortality, perioperative morbidity, length of stay and inpatient medical expenses. Journal of Evaluation in Clinical Practice. 31(3). e14189–e14189.

Sasaki, Noriko, et al.. (2024). Hidden Populations for Healthcare Financial Protection in the Super-Aging Society: Closing the Gap Between Policy and Practice. Clinical Social Work Journal. 52(3). 310–321.

Umegaki, Takeshi, Susumu Kunisawa, Takahiko Kamibayashi, Kiyohide Fushimi, & Yuichi Imanaka. (2024). Comparison of In-Hospital Outcomes between Open Aneurysm Repair and Endovascular Aneurysm Repair for Ruptured Abdominal Aortic Aneurysm: A Retrospective Cohort Study Using Japanese Administrative Data. Annals of Vascular Diseases. 17(4). 351–357.

Shin, Jungho, et al.. (2024). Impact of the guidance on fracture Liaison Services and the introduction of a new fee for secondary fracture prevention in Japan: Implementation of secondary fracture prevention during hospitalization for fragility fractures. Osteoporosis International. 36(2). 235–244. 2 indexed citations

10.

Higuchi, T., Jung‐ho Shin, Daisuke Takada, et al.. (2023). The Japanese Guide affected the prescription of steroids for COVID-19 inpatients during the COVID-19 epidemic in Japan. Scientific Reports. 13(1). 9041–9041. 1 indexed citations

11.

Nagano, Hiroyuki, Jung‐ho Shin, Tetsuji Morishita, et al.. (2021). Hospitalization for ischemic stroke was affected more in independent cases than in dependent cases during the COVID-19 pandemic: An interrupted time series analysis. PLoS ONE. 16(12). e0261587–e0261587. 5 indexed citations

12.

Okuno, T., Susumu Kunisawa, Kiyohide Fushimi, & Yuichi Imanaka. (2021). Intra-operative autologous blood donation for cardiovascular surgeries in Japan: A retrospective cohort study. PLoS ONE. 16(3). e0247282–e0247282. 7 indexed citations

13.

Okuno, T., et al.. (2021). Physical restraint of dementia patients in acute care hospitals during the COVID-19 pandemic: A cohort analysis in Japan. PLoS ONE. 16(11). e0260446–e0260446. 10 indexed citations

14.

Okuno, T., Daisuke Takada, Jung‐ho Shin, et al.. (2021). Impact of the early stage of the coronavirus disease 2019 pandemic on surgical volume in Japan. British journal of surgery. 108(4). e173–e174. 9 indexed citations

15.

Shin, Jung‐ho, Daisuke Takada, Tetsuji Morishita, et al.. (2020). Economic impact of the first wave of the COVID-19 pandemic on acute care hospitals in Japan. PLoS ONE. 15(12). e0244852–e0244852. 27 indexed citations

16.

Hara, Koji, Susumu Kunisawa, Noriko Sasaki, & Yuichi Imanaka. (2018). Future projection of the physician workforce and its geographical equity in Japan: a cohort-component model. BMJ Open. 8(9). e023696–e023696. 8 indexed citations

17.

Chaiyakunapruk, Nathorn, et al.. (2018). Cost-Effectiveness of Second-Line Endocrine Therapies in Postmenopausal Women with Hormone Receptor–positive and Human Epidermal Growth Factor Receptor 2–negative Metastatic Breast Cancer in Japan. PharmacoEconomics. 36(9). 1113–1124. 3 indexed citations

18.

Umegaki, Takeshi, Susumu Kunisawa, Yasufumi Nakajima, et al.. (2017). Volume-outcome relationship in surgical aortic valve replacement for patients with aortic valve stenosis:a retrospective analysis of administrative data. 1(3). 1 indexed citations

19.

Yamashita, Kazuto, et al.. (2017). Prediction of pneumonia hospitalization in adults using health checkup data. PLoS ONE. 12(6). e0180159–e0180159. 3 indexed citations

20.

Sasaki, Noriko, Susumu Kunisawa, Hiroshi Ikai, & Yuichi Imanaka. (2017). Differences between determinants of in-hospital mortality and hospitalisation costs for patients with acute heart failure: a nationwide observational study from Japan. BMJ Open. 7(3). e013753–e013753. 15 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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