Hiroki Namikawa

537 total citations
38 papers, 315 citations indexed

About

Hiroki Namikawa is a scholar working on Epidemiology, Molecular Medicine and Clinical Biochemistry. According to data from OpenAlex, Hiroki Namikawa has authored 38 papers receiving a total of 315 indexed citations (citations by other indexed papers that have themselves been cited), including 17 papers in Epidemiology, 16 papers in Molecular Medicine and 11 papers in Clinical Biochemistry. Recurrent topics in Hiroki Namikawa's work include Antibiotic Resistance in Bacteria (16 papers), Bacterial Identification and Susceptibility Testing (11 papers) and Antibiotic Use and Resistance (5 papers). Hiroki Namikawa is often cited by papers focused on Antibiotic Resistance in Bacteria (16 papers), Bacterial Identification and Susceptibility Testing (11 papers) and Antibiotic Use and Resistance (5 papers). Hiroki Namikawa collaborates with scholars based in Japan, Albania and Venezuela. Hiroki Namikawa's co-authors include Hiroshi Kakeya, Koichi Yamada, Yukihiro Kaneko, Taichi Shuto, Ken-Ichi Oinuma, Yasuhiko Takemoto, Yoshihiro Tochino, Hiroki Fujimoto, Wataru Shibata and Mamiko Niki and has published in prestigious journals such as SHILAP Revista de lepidopterología, Scientific Reports and Atherosclerosis.

In The Last Decade

Hiroki Namikawa

36 papers receiving 311 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Hiroki Namikawa Japan	12	124	103	95	60	53	38	315
Tanaya Bhowmick United States	13	104 0.8×	97 0.9×	111 1.2×	99 1.6×	69 1.3×	33	381
А В Дехнич Russia	12	112 0.9×	119 1.2×	51 0.5×	54 0.9×	74 1.4×	28	276
Joana Alves Portugal	8	83 0.7×	72 0.7×	74 0.8×	32 0.5×	40 0.8×	34	278
Hussam Tabaja United States	11	104 0.8×	149 1.4×	109 1.1×	35 0.6×	49 0.9×	37	371
Indran Balakrishnan United Kingdom	12	206 1.7×	220 2.1×	84 0.9×	62 1.0×	77 1.5×	23	456
Alessandra Belati Italy	10	165 1.3×	78 0.8×	74 0.8×	46 0.8×	90 1.7×	27	365
Alexander Rombauts Spain	9	121 1.0×	132 1.3×	153 1.6×	26 0.4×	48 0.9×	18	368
Paola Del Giacomo Italy	9	198 1.6×	87 0.8×	83 0.9×	65 1.1×	77 1.5×	18	421
J. K. Oberoi India	8	91 0.7×	169 1.6×	85 0.9×	78 1.3×	56 1.1×	11	304
Isabel Sánchez‐Romero Spain	11	94 0.8×	156 1.5×	160 1.7×	27 0.5×	66 1.2×	25	313

Countries citing papers authored by Hiroki Namikawa

Since Specialization

Citations

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

Fields of papers citing papers by Hiroki Namikawa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroki Namikawa

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

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Namikawa, Hiroki, et al.. (2025). Assessment of incidence and risk factors of COVID-19-associated candidemia using diagnosis procedure combination data. Journal of Infection and Chemotherapy. 31(5). 102689–102689.

Imai, Takumi, Hiroki Namikawa, Koichi Yamada, et al.. (2024). Incidence and potential risk factors of human cytomegalovirus infection in patients with severe and critical coronavirus disease 2019. Journal of Infection and Chemotherapy. 31(1). 102452–102452. 2 indexed citations

Okuyama, Naoki, Yasuhiko Takemoto, Hiroki Namikawa, et al.. (2024). Effects of smoking cessation on endothelial function as assessed by flow-mediated total dilation. Cardiovascular Ultrasound. 22(1). 11–11. 1 indexed citations

Namikawa, Hiroki, Yoshihiro Tochino, Keiko Ota, et al.. (2023). Mental health complaints among healthcare workers engaged in the care of COVID‐19 patients: A prospective cohort study from Japan. Journal of General and Family Medicine. 24(4). 240–246. 2 indexed citations

Namikawa, Hiroki, Ken-Ichi Oinuma, Koichi Yamada, et al.. (2023). Differences in severity of bacteraemia caused by hypermucoviscous and non-hypermucoviscous Klebsiella pneumoniae. International Journal of Antimicrobial Agents. 61(5). 106767–106767. 17 indexed citations

Namikawa, Hiroki, Kazuhiro Yamada, Yoshihiro Tochino, et al.. (2023). Predictors for onset of extended-spectrum beta-lactamase-producing Escherichia coli-induced bacteraemia: a systematic review and meta-analysis. Journal of Hospital Infection. 142. 88–95. 1 indexed citations

Namikawa, Hiroki, Yoshihiro Tochino, Keiko Ota, et al.. (2021). Physical health complaints among healthcare workers engaged in the care of critically ill COVID-19 patients: A single tertiary-care center prospective study from Japan. Journal of Infection and Public Health. 14(9). 1263–1267. 7 indexed citations

Yamada, Koichi, Wataru Shibata, Hiroki Namikawa, et al.. (2021). Risk factor analysis for piperacillin-tazobactam-resistant Enterobacter spp. bacteremia at a tertiary hospital. Diagnostic Microbiology and Infectious Disease. 100(2). 115342–115342. 2 indexed citations

Namikawa, Hiroki, Makoto Niki, Mamiko Niki, et al.. (2021). Siderophore production as a biomarker for Klebsiella pneumoniae strains that cause sepsis: A pilot study. Journal of the Formosan Medical Association. 121(4). 848–855. 11 indexed citations

10.

Takemoto, Yasuhiko, Junichi Yoshikawa, Hiroki Namikawa, et al.. (2020). Predictors of endothelial function improvement in patients with mild hypertriglyceridemia without evidence of coronary artery disease treated with purified eicosapentaenoic acid. Atherosclerosis. 309. 27–32. 4 indexed citations

11.

Takemoto, Yasuhiko, Kanae Takahashi, Hiroki Namikawa, et al.. (2020). Predictors of the effects of smoking cessation on the endothelial function of conduit and digital vessels. Hypertension Research. 44(1). 63–70. 8 indexed citations

12.

Yamada, Koichi, Kousuke Okamoto, Makoto Niki, et al.. (2020). Disseminated Mycobacterium abscessus subsp. massiliense infection in a Good’s syndrome patient negative for human immunodeficiency virus and anti-interferon-γ autoantibody: a case report. BMC Infectious Diseases. 20(1). 431–431. 5 indexed citations

13.

Namikawa, Hiroki, Ken-Ichi Oinuma, Taishi Tsubouchi, et al.. (2019). Discovery of anti-mucoviscous activity of rifampicin and its potential as a candidate antivirulence agent against hypervirulent Klebsiella pneumoniae. International Journal of Antimicrobial Agents. 54(2). 167–175. 15 indexed citations

14.

Namikawa, Hiroki, Koichi Yamada, Wataru Shibata, et al.. (2019). Mortality caused by extended-spectrum beta-lactamase–producing Enterobacteriaceae bacteremia; a case control study: alert to Enterobacteriaceae strains with high minimum inhibitory concentrations of piperacillin/tazobactam. Diagnostic Microbiology and Infectious Disease. 94(3). 287–292. 8 indexed citations

15.

Namikawa, Hiroki, Makoto Niki, Mamiko Niki, et al.. (2019). Clinical and virulence factors related to the 30-day mortality of Klebsiella pneumoniae bacteremia at a tertiary hospital: a case–control study. European Journal of Clinical Microbiology & Infectious Diseases. 38(12). 2291–2297. 16 indexed citations

16.

Yamada, Koichi, Wataru Shibata, Hiroki Namikawa, et al.. (2019). The effects of antifungal stewardship programs at a tertiary-care teaching hospital in Japan. Journal of Infection and Chemotherapy. 25(6). 458–462. 19 indexed citations

17.

Yamada, Koichi, Wataru Shibata, Hiroki Namikawa, et al.. (2019). The intervention by an antimicrobial stewardship team can improve clinical and microbiological outcomes of resistant gram-negative bacteria. Journal of Infection and Chemotherapy. 25(12). 1001–1006. 20 indexed citations

18.

Takemoto, Yasuhiko, et al.. (2018). The 1-min animal test as a mental status screening examination in patients with diabetes. SHILAP Revista de lepidopterología. 17(1). 6–6. 3 indexed citations

19.

Nakamura, Shigeki, Makoto Niki, Wataru Shibata, et al.. (2018). Successful treatment of invasive pulmonary aspergillosis caused by Aspergillus felis, a cryptic species within the Aspergillus section Fumigati: A case report. Journal of Infection and Chemotherapy. 25(4). 307–310. 10 indexed citations

20.

Namikawa, Hiroki, Koichi Yamada, Hiroki Fujimoto, et al.. (2016). Two unusual cases of successful treatment of hypermucoviscous Klebsiella pneumoniae invasive syndrome. BMC Infectious Diseases. 16(1). 680–680. 21 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