Koichiro Usuku

7.3k total citations · 2 hit papers
71 papers, 3.8k citations indexed

About

Koichiro Usuku is a scholar working on Immunology, Agronomy and Crop Science and Ecology, Evolution, Behavior and Systematics. According to data from OpenAlex, Koichiro Usuku has authored 71 papers receiving a total of 3.8k indexed citations (citations by other indexed papers that have themselves been cited), including 57 papers in Immunology, 38 papers in Agronomy and Crop Science and 34 papers in Ecology, Evolution, Behavior and Systematics. Recurrent topics in Koichiro Usuku's work include T-cell and Retrovirus Studies (53 papers), Animal Disease Management and Epidemiology (38 papers) and Vector-Borne Animal Diseases (34 papers). Koichiro Usuku is often cited by papers focused on T-cell and Retrovirus Studies (53 papers), Animal Disease Management and Epidemiology (38 papers) and Vector-Borne Animal Diseases (34 papers). Koichiro Usuku collaborates with scholars based in Japan, United Kingdom and United States. Koichiro Usuku's co-authors include Mitsuhiro Osame, Shuji Izumo, Charles R. M. Bangham, A Igata, Makoto Matsumoto, Masahiro Nagai, Wataru Matsumoto, Daisuke Kodama, Norihiro Takenouchi and Mitsutoshi Tara and has published in prestigious journals such as Proceedings of the National Academy of Sciences, SHILAP Revista de lepidopterología and Blood.

In The Last Decade

Koichiro Usuku

71 papers receiving 3.7k citations

Hit Papers

Analysis Of Htlv-I Proviral Load In 202 Ham/Tsp Patients ... 1987 2026 2000 2013 1998 1987 100 200 300 400 500
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Analysis Of Htlv-I Proviral Load In 202 Ham/Tsp Patients And 243 Asymptomatic Htlv-I Carriers: High Proviral Load Strongly Predisposes To Ham/Tsp
    1998 549 citations Masahiro Nagai, Koichiro Usuku et al. Journal of NeuroVirology profile →
  2. Chronic progressive myelopathy associated with elevated antibodies to human T‐lymphotropic virus type I and adult T‐cell leukemialike cells
    1987 540 citations Mitsuhiro Osame, Koichiro Usuku et al. Annals of Neurology profile →

Peers

Koichiro Usuku
Shinji Yashiki Japan
M Ichijo Japan
E DeFreitas United States
Aïssatou Signaté Martinique
Masaharu Kawabata Japan
G.W. Wood United States
Koju Kamoi Japan
Christophe Heylbroeck Canada
C Aubert France
Avery W. Brewer United States
Shinji Yashiki Japan
Koichiro Usuku
Citations per year, relative to Koichiro Usuku Koichiro Usuku (= 1×) peers Shinji Yashiki

Countries citing papers authored by Koichiro Usuku

Since Specialization
Citations

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

Fields of papers citing papers by Koichiro Usuku

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Koichiro Usuku

This figure shows the co-authorship network connecting the top 25 collaborators of Koichiro Usuku. A scholar is included among the top collaborators of Koichiro Usuku 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 Koichiro Usuku. Koichiro Usuku 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.
Segawa, Makoto, Norio Iizuka, Hiroyuki Ogihara, et al.. (2023). Objective evaluation of tongue diagnosis ability using a tongue diagnosis e-learning/e-assessment system based on a standardized tongue image database. SHILAP Revista de lepidopterología. 5. 1050909–1050909. 1 indexed citations
2.
Segawa, Makoto, Norio Iizuka, Hiroyuki Ogihara, et al.. (2021). Construction of a Standardized Tongue Image Database for Diagnostic Education: Development of a Tongue Diagnosis e-Learning System. SHILAP Revista de lepidopterología. 3. 760542–760542. 4 indexed citations
3.
Nakanishi, Tomoko, et al.. (2021). Development of an algorithm for assessing fall risk in a Japanese inpatient population. Scientific Reports. 11(1). 17993–17993. 10 indexed citations
4.
Yoshida, Akira, Hideaki Jinnouchi, Seigo Sugiyama, et al.. (2016). Combined arteriosclerotic assessment of ankle-brachial index and maximum intima-media thickness via CCTA is useful for predicting coronary artery stenosis in patients with type 2 diabetes. Diabetes Research and Clinical Practice. 117. 91–99. 3 indexed citations
5.
Hirose, Jun, et al.. (2013). Validity of E-PASS System for Postoperative Morbidity of Spinal Surgery. Journal of Spinal Disorders & Techniques. 28(10). E595–E600. 11 indexed citations
6.
Hirose, Jun, Junji Ide, Toshitake Yakushiji, et al.. (2010). Prediction of Postoperative Ambulatory Status 1 Year After Hip Fracture Surgery. Archives of Physical Medicine and Rehabilitation. 91(1). 67–72. 25 indexed citations
7.
8.
Saito, Mineki, Nobutaka Eiraku, Koichiro Usuku, et al.. (2005). ApaI polymorphism of vitamin D receptor gene is associated with susceptibility to HTLV-1-associated myelopathy/tropical spastic paraparesis in HTLV-1 infected individuals. Journal of the Neurological Sciences. 232(1-2). 29–35. 18 indexed citations
9.
Furukawa, Yoshitaka, Koichiro Usuku, Shuji Izumo, & Mitsuhiro Osame. (2004). Human T Cell Lymphotropic Virus Type I (HTLV-I) p12 I Is Dispensable for HTLV-I Transmission and Maintenance of Infection in Vivo. AIDS Research and Human Retroviruses. 20(10). 1092–1099. 18 indexed citations
10.
Saito, Mineki, Masanori Nakagawa, Toshio Matsuzaki, et al.. (2004). Decreased Human T Lymphotropic Virus Type I (HTLV‐I) Provirus Load and Alteration in T Cell Phenotype after Interferon‐α Therapy for HTLV‐I–Associated Myelopathy/Tropical Spastic Paraparesis. The Journal of Infectious Diseases. 189(1). 29–40. 40 indexed citations
11.
Jeffery, Katie, Asna A. Siddiqui, Mike Bunce, et al.. (2000). The Influence of HLA Class I Alleles and Heterozygosity on the Outcome of Human T Cell Lymphotropic Virus Type I Infection. The Journal of Immunology. 165(12). 7278–7284. 173 indexed citations
12.
Matsuzaki, Toshio, Masanori Nakagawa, Masahiro Nagai, et al.. (2000). HTLV-I-associated myelopathy (HAM)/tropical spastic paraparesis (TSP) with amyotrophic lateral sclerosis-like manifestations. Journal of NeuroVirology. 6(6). 544–548. 34 indexed citations
13.
Takenouchi, Norihiro, Eiji Matsuoka, Takashi Moritoyo, et al.. (1999). Molecular Pathologic Analysis of the Tonsil in HTLV-I–Infected Individuals. JAIDS Journal of Acquired Immune Deficiency Syndromes. 22(2). 200–200. 9 indexed citations
14.
Koh, Chang‐Sung, et al.. (1997). Detection of the soluble form of the Fas molecule in patients with multiple sclerosis and human T-lymphotropic virus type I-associated myelopathy. Journal of Neuroimmunology. 75(1-2). 141–146. 44 indexed citations
15.
Garcı́a-Merino, Antonio, Chester A. Alper, Koichiro Usuku, et al.. (1996). Tumor Necrosis Pactor (TNF) microsatellite haplotypes in relation to extended haplotypes, susceptibility to diseases associated with the major histocompatibility complex and TNF secretion. Human Immunology. 50(1). 11–21. 66 indexed citations
16.
17.
Yu, John S., Janardan P. Pandey, Luca Massacesi, et al.. (1993). Segregation of immunoglobulin heavy chain constant region genes in multiple sclerosis sibling pairs. Journal of Neuroimmunology. 42(1). 113–116. 10 indexed citations
18.
Usuku, Koichiro, Masatoyo Nishizawa, Mitsuhiro Osame, & Takeshi Tabira. (1991). Cytotoxic and suppressor activities in patients with HTLV-I-associated myelopathy. Journal of Neuroimmunology. 33(3). 199–205. 3 indexed citations
19.
Usuku, Koichiro, Masatoyo Nishizawa, Kazumasa Matsuki, et al.. (1990). Association of a particular amino acid sequence of the HLA‐DR β1 chain with HTLV‐I‐associated myelopathy. European Journal of Immunology. 20(7). 1603–1606. 26 indexed citations
20.
Shoji, Hiroshi, Masaro Kaji, Yuichi Miyamoto, et al.. (1989). HTLV-I-Associated Myelopathy and Adult T-Cell Leukemia Cases in a Family. European Neurology. 29(1). 33–35. 5 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 Shinji Yashiki Breakdown of academic impact, for papers by M Ichijo Breakdown of academic impact, for papers by E DeFreitas Breakdown of academic impact, for papers by Aïssatou Signaté Breakdown of academic impact, for papers by Masaharu Kawabata Breakdown of academic impact, for papers by G.W. Wood Breakdown of academic impact, for papers by Koju Kamoi Breakdown of academic impact, for papers by Christophe Heylbroeck Breakdown of academic impact, for papers by C Aubert Breakdown of academic impact, for papers by Avery W. Brewer
Rankless by CCL
2026