Koji Ichiyama

1.4k total citations
27 papers, 1.1k citations indexed

About

Koji Ichiyama is a scholar working on Infectious Diseases, Hepatology and Virology. According to data from OpenAlex, Koji Ichiyama has authored 27 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Infectious Diseases, 7 papers in Hepatology and 6 papers in Virology. Recurrent topics in Koji Ichiyama's work include HIV Research and Treatment (6 papers), Viral gastroenteritis research and epidemiology (6 papers) and Hepatitis Viruses Studies and Epidemiology (6 papers). Koji Ichiyama is often cited by papers focused on HIV Research and Treatment (6 papers), Viral gastroenteritis research and epidemiology (6 papers) and Hepatitis Viruses Studies and Epidemiology (6 papers). Koji Ichiyama collaborates with scholars based in Japan, Singapore and United States. Koji Ichiyama's co-authors include Hiroaki Okamoto, Masaharu Takahashi, Toshinori Tanaka, Yu Hoshino, Hideyuki Takahashi, Kentaro Yamada, Naoki Yamamoto, Shigeo Nagashima, Kenji Ohba and Youichi Suzuki and has published in prestigious journals such as Journal of Clinical Oncology, PLoS ONE and Macromolecules.

In The Last Decade

Koji Ichiyama

25 papers receiving 1.1k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Koji Ichiyama Japan	17	590	572	269	142	138	27	1.1k
Israr-ul H. Ansari United States	24	601 1.0×	1.0k 1.8×	282 1.0×	285 2.0×	31 0.2×	36	1.8k
Tatsunori Nakano Japan	23	1.4k 2.4×	537 0.9×	1.1k 4.2×	114 0.8×	19 0.1×	63	1.8k
Anupam Mukherjee India	20	219 0.4×	639 1.1×	265 1.0×	314 2.2×	106 0.8×	72	1.3k
Rachael N. Labitt United States	10	307 0.5×	158 0.3×	276 1.0×	123 0.9×	49 0.4×	14	692
Neda Nasheri Canada	17	213 0.4×	349 0.6×	122 0.5×	310 2.2×	18 0.1×	44	825
Zoya Dimitrova United States	15	574 1.0×	203 0.4×	424 1.6×	183 1.3×	39 0.3×	40	879
Kyung-Soo Chang South Korea	12	532 0.9×	105 0.2×	595 2.2×	182 1.3×	49 0.4×	57	999
Azeem Mehmood Butt Pakistan	15	89 0.2×	219 0.4×	233 0.9×	496 3.5×	88 0.6×	30	990
Jürgen Held Germany	18	103 0.2×	570 1.0×	550 2.0×	163 1.1×	79 0.6×	54	1.1k
Peng Xiao United States	20	106 0.2×	395 0.7×	307 1.1×	275 1.9×	73 0.5×	70	1.4k

Countries citing papers authored by Koji Ichiyama

Since Specialization

Citations

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

Fields of papers citing papers by Koji Ichiyama

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Koji Ichiyama

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

Ikewaki, Nobunao, et al.. (2025). Effects of Nichi BRITE β-glucans as an onco-nutrition adjuvant in patients undergoing subtotal stomach-preserving pancreaticoduodenectomy (SSPPD) for pancreatic, bile duct and duodenal malignancies: A clinical study. Nutrition. 137. 112811–112811. 1 indexed citations

Preethy, Senthilkumar, Shuji Sakamoto, Takuma Higuchi, et al.. (2025). Enhanced expression of dystrophin, IGF-1, CD44 and MYH3 in plasma and skeletal muscles including diaphragm of mdx mice after oral administration of Neu REFIX beta 1,3-1,6 glucan. Scientific Reports. 15(1). 7232–7232. 2 indexed citations

Ikewaki, Nobunao, Koji Ichiyama, Rajappa Senthilkumar, Senthilkumar Preethy, & Samuel JK Abraham. (2025). Modulation of neutrophil-to-lymphocyte ratio and gut microbiome balance in astronauts: potential benefits of novel beta-glucans during space missions. Frontiers in Immunology. 16. 1538147–1538147.

Abraham, Samuel JK, et al.. (2024). Effects of Aureobasidium Pullulans produced β-1,3-1,6-glucan on CA19-9, sCD44, IgA and sCD209 in patients undergoing surgical resection of malignant pancreatic tumors.. Journal of Clinical Oncology. 42(23_suppl). 96–96. 1 indexed citations

Ichiyama, Koji, Chuan Yang, Lakshmi Chandrasekaran, et al.. (2016). Cooperative Orthogonal Macromolecular Assemblies with Broad Spectrum Antiviral Activity, High Selectivity, and Resistance Mitigation. Macromolecules. 49(7). 2618–2629. 24 indexed citations

Tan, Darren Qiancheng, Li‐Feng Zhang, Kenji Ohba, et al.. (2016). Macrophage response to oncolytic paramyxoviruses potentiates virus‐mediated tumor cell killing. European Journal of Immunology. 46(4). 919–928. 37 indexed citations

Kato, Fumihiro, Yuki Ishida, Shinya Oishi, et al.. (2016). Novel antiviral activity of bromocriptine against dengue virus replication. Antiviral Research. 131. 141–147. 67 indexed citations

Muschin, Tegshi, Taisei Kanamoto, Hideki Nakashima, et al.. (2016). Chemically sulfated natural galactomannans with specific antiviral and anticoagulant activities. International Journal of Biological Macromolecules. 89. 415–420. 31 indexed citations

Suzuki, Youichi, Wei-Xin Chin, Koji Ichiyama, et al.. (2016). Characterization of RyDEN (C19orf66) as an Interferon-Stimulated Cellular Inhibitor against Dengue Virus Replication. PLoS Pathogens. 12(1). e1005357–e1005357. 87 indexed citations

10.

Jeyasekharan, Anand D., Kuangwen Hsieh, Koji Ichiyama, et al.. (2014). Combination of vaccine-strain measles and mumps virus synergistically kills a wide range of human hematological cancer cells: Special focus on acute myeloid leukemia. Cancer Letters. 354(2). 272–280. 15 indexed citations

11.

Joseph, Baby, P. Sankarganesh, Koji Ichiyama, & Naoki Yamamoto. (2014). In vitrostudy on cytotoxic effect and anti-DENV2 activity ofCarica papayaL. leaf. 8(1). 18–22. 26 indexed citations

12.

He, Hongxia, Leroy R. Sharer, Wei Chao, et al.. (2013). Enhanced Human Immunodeficiency Virus Type 1 Expression and Neuropathogenesis in Knockout Mice Lacking Type I Interferon Responses. Journal of Neuropathology & Experimental Neurology. 73(1). 59–71. 37 indexed citations

13.

Ichiyama, Koji, Wei-Xin Chin, Tegshi Muschin, et al.. (2013). Sulfated Polysaccharide, Curdlan Sulfate, Efficiently Prevents Entry/Fusion and Restricts Antibody-Dependent Enhancement of Dengue Virus Infection In Vitro: A Possible Candidate for Clinical Application. PLoS neglected tropical diseases. 7(4). e2188–e2188. 62 indexed citations

14.

Mulyanto, Mulyanto, et al.. (2009). A nationwide molecular epidemiological study on hepatitis B virus in Indonesia: identification of two novel subgenotypes, B8 and C7. Archives of Virology. 154(7). 1047–1059. 65 indexed citations

15.

Tanaka, Toshinori, Masaharu Takahashi, Hideyuki Takahashi, et al.. (2009). Development and Characterization of a Genotype 4 Hepatitis E Virus Cell Culture System Using a HE-JF5/15F Strain Recovered from a Fulminant Hepatitis Patient. Journal of Clinical Microbiology. 47(6). 1906–1910. 76 indexed citations

16.

Ichiyama, Koji, Kentaro Yamada, Toshinori Tanaka, et al.. (2009). Determination of the 5′-terminal sequence of subgenomic RNA of hepatitis E virus strains in cultured cells. Archives of Virology. 154(12). 1945–1951. 37 indexed citations

17.

Lorenzo, Felipe, Toshinori Tanaka, Hideyuki Takahashi, et al.. (2008). Mutational events during the primary propagation and consecutive passages of hepatitis E virus strain JE03-1760F in cell culture. Virus Research. 137(1). 86–96. 46 indexed citations

18.

Takahashi, Masaharu, Kentaro Yamada, Yu Hoshino, et al.. (2008). Monoclonal antibodies raised against the ORF3 protein of hepatitis E virus (HEV) can capture HEV particles in culture supernatant and serum but not those in feces. Archives of Virology. 153(9). 1703–1713. 135 indexed citations

19.

Kasolo, Francis, et al.. (2006). Increased Risk of Intrauterine Transmission of HIV-1 Associated With Granulocyte Elastase in Endocervical Mucus. JAIDS Journal of Acquired Immune Deficiency Syndromes. 41(2). 249–251. 4 indexed citations

20.

Nakashima, Hideki, Koji Ichiyama, Fukushi Hirayama, et al.. (1996). Sulfated pentagalloyl glucose (Y-ART-3) inhibits HIV replication and cytopathic effects in vitro, and reduces HIV infection in hu-PBL-SCID mice. Antiviral Research. 30(2-3). 95–108. 10 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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