Ryoji Hirota

1.2k total citations
51 papers, 845 citations indexed

About

Ryoji Hirota is a scholar working on Physiology, Molecular Biology and Cellular and Molecular Neuroscience. According to data from OpenAlex, Ryoji Hirota has authored 51 papers receiving a total of 845 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Physiology, 10 papers in Molecular Biology and 8 papers in Cellular and Molecular Neuroscience. Recurrent topics in Ryoji Hirota's work include Neuropeptides and Animal Physiology (7 papers), Stress Responses and Cortisol (7 papers) and Circadian rhythm and melatonin (5 papers). Ryoji Hirota is often cited by papers focused on Neuropeptides and Animal Physiology (7 papers), Stress Responses and Cortisol (7 papers) and Circadian rhythm and melatonin (5 papers). Ryoji Hirota collaborates with scholars based in Japan, Democratic Republic of the Congo and United States. Ryoji Hirota's co-authors include Shinji Itoh, Narufumi Suganuma, Goro Katsuura, Masamitsu Eitoku, Hiroyuki Nakamura, Nlandu Roger Ngatu, Masayoshi Sawamura, Basilua André Muzembo, Hee‐Sun Song and S Nakagawa and has published in prestigious journals such as Journal of Allergy and Clinical Immunology, Environment International and Cellular and Molecular Life Sciences.

In The Last Decade

Ryoji Hirota

47 papers receiving 817 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ryoji Hirota Japan 17 168 153 139 103 95 51 845
Maheep Bhatnagar India 21 106 0.6× 262 1.7× 106 0.8× 65 0.6× 169 1.8× 97 1.6k
Marcin Zawadzki Poland 18 69 0.4× 200 1.3× 73 0.5× 69 0.7× 56 0.6× 106 1.0k
Bruce K. Bernard United States 18 70 0.4× 212 1.4× 116 0.8× 45 0.4× 69 0.7× 40 777
K. Salminen Finland 20 126 0.8× 92 0.6× 147 1.1× 35 0.3× 16 0.2× 49 939
Ángel L. López de Pablo Spain 18 42 0.3× 139 0.9× 142 1.0× 36 0.3× 45 0.5× 47 1.0k
Ayodeji Folorunsho Ajayi Nigeria 15 58 0.3× 240 1.6× 108 0.8× 24 0.2× 92 1.0× 80 1.2k
Hanna Krauss Poland 17 58 0.3× 163 1.1× 190 1.4× 58 0.6× 19 0.2× 81 849
P Boscolo Italy 26 63 0.4× 224 1.5× 264 1.9× 32 0.3× 690 7.3× 111 1.8k
Naohiko INOUE Japan 18 44 0.3× 135 0.9× 406 2.9× 97 0.9× 33 0.3× 43 1.3k
Mehmet Ferit Gürsu Türkiye 26 31 0.2× 190 1.2× 164 1.2× 33 0.3× 185 1.9× 69 1.9k

Countries citing papers authored by Ryoji Hirota

Since Specialization
Citations

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

Fields of papers citing papers by Ryoji Hirota

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ryoji Hirota

This figure shows the co-authorship network connecting the top 25 collaborators of Ryoji Hirota. A scholar is included among the top collaborators of Ryoji Hirota 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 Ryoji Hirota. Ryoji Hirota 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.
Tsujiguchi, Hiromasa, Fumihiko Suzuki, Akinori Hara, et al.. (2025). Resilience and quality of life of disaster survivors six months after the Noto Peninsula earthquake: A population-based Shika study. Acta Psychologica. 260. 105602–105602.
2.
3.
Eitoku, Masamitsu, et al.. (2020). Biomass energy, particulate matter (PM2.5), and the prevalence of chronic obstructive pulmonary disease (COPD) among Congolese women living near of a cement plant, in Kongo Central Province. Environmental Science and Pollution Research. 27(32). 40706–40714. 10 indexed citations
4.
Yamamoto‐Hanada, Kiwako, Yuma Fukutomi, Ryoji Hirota, et al.. (2019). Exposure to paraben and triclosan and allergic diseases in Tokyo: A pilot cross-sectional study. Asia Pacific Allergy. 9(1). e5–e5. 10 indexed citations
5.
Eitoku, Masamitsu, et al.. (2018). Prevalence of chronic obstructive pulmonary disease (COPD) among Congolese cement workers exposed to cement dust, in Kongo Central Province. Environmental Science and Pollution Research. 25(35). 35074–35083. 21 indexed citations
6.
Hirota, Ryoji, et al.. (2017). Occupation exposed to road-traffic emissions and respiratory health among Congolese transit workers, particularly bus conductors, in Kinshasa: a cross-sectional study. Environmental Health and Preventive Medicine. 22(1). 11–11. 29 indexed citations
7.
Muzembo, Basilua André, Yoji Deguchi, Nlandu Roger Ngatu, et al.. (2015). Selenium and exposure to fibrogenic mineral dust: A mini-review. Environment International. 77. 16–24. 19 indexed citations
8.
Muzembo, Basilua André, Masamitsu Eitoku, Kenichi Hirabayashi, et al.. (2014). Prevalence of Occupational Allergy in Medical Researchers Exposed to Laboratory Animals. Industrial Health. 52(3). 256–261. 9 indexed citations
9.
Muzembo, Basilua André, Masamitsu Eitoku, Nlandu Roger Ngatu, et al.. (2013). A cross-sectional assessment of oxidative DNA damage and muscle strength among elderly people living in the community. Environmental Health and Preventive Medicine. 19(1). 21–29. 11 indexed citations
10.
Hoshino, Eri, Sasivimol Rattanasiri, Dittapol Muntham, et al.. (2013). Radiographic Progression of Silicosis among Japanese Tunnel Workers in Kochi. Journal of Occupational Health. 55(3). 142–148. 9 indexed citations
11.
Hirota, Ryoji, Hiroyuki Nakamura, Nlandu Roger Ngatu, et al.. (2012). Limonene inhalation reduces allergic airway inflammation inDermatophagoides farinae-treated mice. Inhalation Toxicology. 24(6). 373–381. 42 indexed citations
12.
Muzembo, Basilua André, Nlandu Roger Ngatu, Masamitsu Eitoku, et al.. (2012). Serum selenium and selenoprotein P in patients with silicosis. Journal of Trace Elements in Medicine and Biology. 27(1). 40–44. 12 indexed citations
13.
Hirota, Ryoji, Nlandu Roger Ngatu, Mitsuhiko Miyamura, Hiroyuki Nakamura, & Narufumi Suganuma. (2011). Goishi tea consumption inhibits airway hyperresponsiveness in BALB/c mice. BMC Immunology. 12(1). 45–45. 6 indexed citations
14.
Ngatu, Nlandu Roger, Ryoji Hirota, Jane Perry, et al.. (2011). Practice of universal precautions and risk of occupational blood-borne viral infection among Congolese health care workers. American Journal of Infection Control. 40(1). 68–70.e1. 20 indexed citations
15.
Ngatu, Nlandu Roger, Ryoji Hirota, Masamitsu Eitoku, et al.. (2011). Perception of the risk of sexual transmission of HIV among Congolese and Japanese university students. Environmental Health and Preventive Medicine. 17(2). 139–146. 6 indexed citations
16.
Muzembo, Basilua André, et al.. (2011). Assessment of lifestyle effect on oxidative stress biomarkers in free‐living elderly in rural Japan. Geriatrics and gerontology international. 12(3). 547–554. 7 indexed citations
17.
Hirota, Ryoji, et al.. (2010). Anti‐inflammatory Effects of Limonene from Yuzu ( Citrus junos  Tanaka) Essential Oil on Eosinophils. Journal of Food Science. 75(3). H87–92. 133 indexed citations
18.
Hirota, Ryoji, Kunihiro Akimaru, & Hiroyuki Nakamura. (2008). In vitro toxicity evaluation of diesel exhaust particles on human eosinophilic cell. Toxicology in Vitro. 22(4). 988–994. 16 indexed citations
19.
Kubo, Nobuhiko, et al.. (2003). Structural analysis using atomic force microscopy of the surface of red blood cells to detect anti-red blood cell autoantibody.. PubMed. 9(1). 47–9. 1 indexed citations
20.
Itoh, Shinji & Ryoji Hirota. (1978). Postnatal Development of Adrenocortical Circadian Rhythm in Neonatally Cortisoi- and Estriol-treated Rats. Folia Endocrinologica Japonica. 54(3). 227–237. 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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