Hiroaki Niitsu

1.6k total citations
32 papers, 628 citations indexed

About

Hiroaki Niitsu is a scholar working on Oncology, Surgery and Molecular Biology. According to data from OpenAlex, Hiroaki Niitsu has authored 32 papers receiving a total of 628 indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Oncology, 10 papers in Surgery and 10 papers in Molecular Biology. Recurrent topics in Hiroaki Niitsu's work include Genetic factors in colorectal cancer (9 papers), Colorectal Cancer Screening and Detection (7 papers) and Colorectal Cancer Surgical Treatments (5 papers). Hiroaki Niitsu is often cited by papers focused on Genetic factors in colorectal cancer (9 papers), Colorectal Cancer Screening and Detection (7 papers) and Colorectal Cancer Surgical Treatments (5 papers). Hiroaki Niitsu collaborates with scholars based in Japan, United States and China. Hiroaki Niitsu's co-authors include Takao Hinoi, Hideki Ohdan, Naoki Hirabayashi, Masanori Yoshimitsu, Shuji Saeki, Wataru Takiyama, Hidenori Mukaida, Junya Taomoto, Shigeru Murakami and Takeshi Mimura and has published in prestigious journals such as Gastroenterology, PLoS ONE and Scientific Reports.

In The Last Decade

Hiroaki Niitsu

29 papers receiving 620 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hiroaki Niitsu Japan 12 254 222 156 111 102 32 628
Muna Qayed United States 15 116 0.5× 280 1.3× 315 2.0× 56 0.5× 111 1.1× 80 886
Roger Wahba Germany 13 222 0.9× 71 0.3× 128 0.8× 97 0.9× 139 1.4× 61 660
M. Chianelli Italy 18 323 1.3× 89 0.4× 176 1.1× 35 0.3× 77 0.8× 39 845
Hidenori Mukaida Japan 14 528 2.1× 120 0.5× 277 1.8× 89 0.8× 382 3.7× 74 905
Lori Shah United States 14 387 1.5× 98 0.4× 101 0.6× 69 0.6× 223 2.2× 32 802
A. Scheed Austria 13 401 1.6× 85 0.4× 94 0.6× 114 1.0× 386 3.8× 25 771
J. Parmar United Kingdom 16 291 1.1× 135 0.6× 172 1.1× 92 0.8× 257 2.5× 41 855
Kapil Sahnan United Kingdom 17 660 2.6× 194 0.9× 192 1.2× 27 0.2× 87 0.9× 78 1.1k
Joo Hyun Oh South Korea 14 194 0.8× 134 0.6× 123 0.8× 24 0.2× 92 0.9× 39 589
Tao Lan China 13 201 0.8× 173 0.8× 60 0.4× 39 0.4× 78 0.8× 31 816

Countries citing papers authored by Hiroaki Niitsu

Since Specialization
Citations

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

Fields of papers citing papers by Hiroaki Niitsu

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroaki Niitsu

This figure shows the co-authorship network connecting the top 25 collaborators of Hiroaki Niitsu. A scholar is included among the top collaborators of Hiroaki Niitsu 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 Hiroaki Niitsu. Hiroaki Niitsu 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
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Kobayashi, Go, Yohei Sekino, Kohei Kobatake, et al.. (2025). Nectin-4 expression in upper and lower tract urothelial carcinoma: correlation with early-stage disease and prognostic relevance. Archiv für Pathologische Anatomie und Physiologie und für Klinische Medicin. 1 indexed citations
3.
Kobayashi, Go, Yohei Sekino, Kenichiro Ikeda, et al.. (2025). Clinicopathological Characteristics of Upper Tract Urothelial Cancer With Loss of Immunohistochemical Expression of Mismatch Repair Proteins. International Journal of Urology. 32(9). 1257–1269. 1 indexed citations
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Niitsu, Hiroaki, et al.. (2021). Cell-Autonomous Role of EGFR in Spontaneous Duodenal Tumors in LRIG1 Null Mice. Cellular and Molecular Gastroenterology and Hepatology. 12(3). 1159–1162.e4. 1 indexed citations
6.
Kochi, Masatoshi, Takao Hinoi, Hiroaki Niitsu, et al.. (2020). Oncogenic mutation in RAS‐RAF axis leads to increased expression of GREB1, resulting in tumor proliferation in colorectal cancer. Cancer Science. 111(10). 3540–3549. 6 indexed citations
7.
Saito, Yasufumi, Takao Hinoi, Tomohiro Adachi, et al.. (2019). Synbiotics suppress colitis-induced tumorigenesis in a colon-specific cancer mouse model. PLoS ONE. 14(6). e0216393–e0216393. 15 indexed citations
8.
Niitsu, Hiroaki, et al.. (2018). Clinical Characteristics and Surgical Treatment for Inguinal Endometriosis in Young Women of Reproductive Age. Digestive Surgery. 36(2). 166–172. 20 indexed citations
9.
Kochi, Masatoshi, Takao Hinoi, Hiroaki Niitsu, et al.. (2018). Risk factors for postoperative pneumonia in elderly patients with colorectal cancer: a sub-analysis of a large, multicenter, case-control study in Japan. Surgery Today. 48(8). 756–764. 11 indexed citations
10.
Sagami, Shintaro, Yoshitaka Ueno, Shinji Tanaka, et al.. (2017). Choline Deficiency Causes Colonic Type II Natural Killer T (NKT) Cell Loss and Alleviates Murine Colitis under Type I NKT Cell Deficiency. PLoS ONE. 12(1). e0169681–e0169681. 16 indexed citations
11.
Niitsu, Hiroaki, Takao Hinoi, Yasuo Kawaguchi, et al.. (2016). KRAS mutation leads to decreased expression of regulator of calcineurin 2, resulting in tumor proliferation in colorectal cancer. Oncogenesis. 5(8). e253–e253. 24 indexed citations
12.
Yamamoto, Seiichiro, Takao Hinoi, Hiroaki Niitsu, et al.. (2016). Influence of previous abdominal surgery on surgical outcomes between laparoscopic and open surgery in elderly patients with colorectal cancer: subanalysis of a large multicenter study in Japan. Journal of Gastroenterology. 52(6). 695–704. 8 indexed citations
13.
Niitsu, Hiroaki, Takao Hinoi, Kazuhiro Sentani, et al.. (2016). Increased Calcineurin A Expression Is Associated with a Lower Relapse-Free Survival Rate after Colorectal Cancer Surgery. Pathobiology. 83(6). 308–315. 1 indexed citations
14.
Shimomura, Manabu, Takao Hinoi, Hiroyuki Egi, et al.. (2015). Avoiding restorative proctocolectomy for colorectal cancer in patients with ulcerative colitis based on preoperative diagnosis involving p53 immunostaining: report of a case. World Journal of Surgical Oncology. 13(1). 123–123. 2 indexed citations
15.
Niitsu, Hiroaki, Takao Hinoi, Manabu Shimomura, et al.. (2015). Up-front systemic chemotherapy is a feasible option compared to primary tumor resection followed by chemotherapy for colorectal cancer with unresectable synchronous metastases. World Journal of Surgical Oncology. 13(1). 162–162. 18 indexed citations
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Niitsu, Hiroaki, Kazuaki Tanabe, Noriaki Tokumoto, et al.. (2012). Idiopathic Granulomatous Gastritis Resembling a Gastrointestinal Stromal Tumor. Case Reports in Gastroenterology. 6(2). 502–509. 9 indexed citations
18.
Niitsu, Hiroaki, Naoki Hirabayashi, Masanori Yoshimitsu, et al.. (2012). Using the Objective Structured Assessment of Technical Skills (OSATS) global rating scale to evaluate the skills of surgical trainees in the operating room. Surgery Today. 43(3). 271–275. 187 indexed citations
19.
Niitsu, Hiroaki, et al.. (2010). [A case of breast cancer with multiple hepatic metastasis successfully treated with S-1/PTX and S-1 chemotherapy].. PubMed. 37(6). 1087–90.
20.
Amano, Hizuru, Hirotaka Tashiro, Toshiyuki Itamoto, et al.. (2009). Successful Living Donor Left Liver Transplantation by Using Liver Graft With Multiple Large Cysts: A Case Report. Transplantation Proceedings. 41(9). 3923–3926. 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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