Hiroki Imaoka

1.2k total citations
56 papers, 877 citations indexed

About

Hiroki Imaoka is a scholar working on Surgery, Oncology and Cancer Research. According to data from OpenAlex, Hiroki Imaoka has authored 56 papers receiving a total of 877 indexed citations (citations by other indexed papers that have themselves been cited), including 27 papers in Surgery, 21 papers in Oncology and 17 papers in Cancer Research. Recurrent topics in Hiroki Imaoka's work include Inflammatory Biomarkers in Disease Prognosis (12 papers), Esophageal Cancer Research and Treatment (9 papers) and Cancer-related molecular mechanisms research (8 papers). Hiroki Imaoka is often cited by papers focused on Inflammatory Biomarkers in Disease Prognosis (12 papers), Esophageal Cancer Research and Treatment (9 papers) and Cancer-related molecular mechanisms research (8 papers). Hiroki Imaoka collaborates with scholars based in Japan, United States and South Korea. Hiroki Imaoka's co-authors include Yuji Toiyama, Yasuhiro Inoue, Yoshinaga Okugawa, Yasuhiko Mohri, Susumu Saigusa, Masato Kusunoki, Koji Tanaka, Ajay Goel, Shozo Ide and Masaki Ohi and has published in prestigious journals such as Journal of Clinical Oncology, SHILAP Revista de lepidopterología and Gastroenterology.

In The Last Decade

Hiroki Imaoka

50 papers receiving 866 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hiroki Imaoka Japan 16 452 451 330 176 131 56 877
Ryu Shimada Japan 15 289 0.6× 281 0.6× 396 1.2× 206 1.2× 141 1.1× 48 811
Long Bai China 15 208 0.5× 342 0.8× 417 1.3× 161 0.9× 240 1.8× 31 876
Chen Huang China 16 214 0.5× 326 0.7× 271 0.8× 146 0.8× 128 1.0× 38 843
Zhixun Zhao China 15 242 0.5× 245 0.5× 324 1.0× 176 1.0× 163 1.2× 46 688
Yihuan Luo China 18 437 1.0× 470 1.0× 169 0.5× 82 0.5× 115 0.9× 28 786
Xiangqian Su China 18 249 0.6× 380 0.8× 395 1.2× 324 1.8× 594 4.5× 103 1.3k
Keijiro Nozawa Japan 18 192 0.4× 201 0.4× 677 2.1× 303 1.7× 246 1.9× 70 1.0k
Martin R. Buta United States 6 269 0.6× 701 1.6× 212 0.6× 112 0.6× 99 0.8× 18 920
Zixu Yuan China 13 351 0.8× 327 0.7× 184 0.6× 88 0.5× 78 0.6× 27 636
Shubing Zou China 16 196 0.4× 185 0.4× 235 0.7× 219 1.2× 162 1.2× 30 596

Countries citing papers authored by Hiroki Imaoka

Since Specialization
Citations

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

Fields of papers citing papers by Hiroki Imaoka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroki Imaoka

This figure shows the co-authorship network connecting the top 25 collaborators of Hiroki Imaoka. A scholar is included among the top collaborators of Hiroki Imaoka 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 Imaoka. Hiroki Imaoka 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.
Okugawa, Yoshinaga, Takahito Kitajima, Yuki Sato, et al.. (2025). Association between prognostic immune nutritional index and disease‐free survival in adults with esophageal cancer following surgery: A retrospective cohort study. Journal of Parenteral and Enteral Nutrition. 49(4). 497–506.
2.
Okugawa, Yoshinaga, Yumiko Shirai, Takahito Kitajima, et al.. (2024). Effect of the Japanese herbal medicine Hochuekkito for systemic inflammation, prognostic nutrition index, and body composition status in patients with gastrointestinal cancer. Clinical Nutrition ESPEN. 63. 757–767. 1 indexed citations
3.
Mercadé, T. Macarulla, C. Benedikt Westphalen, Hiroki Imaoka, et al.. (2024). 1519P Real-world evidence on long-term survivors of metastatic pancreatic ductal adenocarcinoma (mPDAC) previously treated with liposomal irinotecan: NALLONG study. Annals of Oncology. 35. S928–S929.
4.
Okugawa, Yoshinaga, Masaki Ohi, Takahito Kitajima, et al.. (2024). Clinical feasibility of the preoperative C-reactive protein–albumin–lymphocyte index to predict short- and long-term outcomes of patients with gastric cancer. Journal of Gastrointestinal Surgery. 28(7). 1045–1050. 13 indexed citations
5.
Tsujiura, Masahiro, Akira Yamamoto, Hiroki Imaoka, et al.. (2022). Clinical utility of lymphocyte to C-reactive protein ratio in predicting survival and postoperative complication for esophago-gastric junction cancer. Surgical Oncology. 44. 101842–101842. 4 indexed citations
6.
Kitajima, Takahito, Yoshinaga Okugawa, Tadanobu Shimura, et al.. (2022). Combined assessment of muscle quality and quantity predicts oncological outcome in patients with esophageal cancer. The American Journal of Surgery. 225(6). 1036–1044. 6 indexed citations
7.
Okugawa, Yoshinaga, Yuji Toiyama, Takashi Ichikawa, et al.. (2021). Modified intramuscular adipose tissue content as a feasible surrogate marker for malnutrition in gastrointestinal cancer. Clinical Nutrition. 40(5). 2640–2653. 19 indexed citations
8.
Ide, Shozo, Yoshinaga Okugawa, Yusuke Omura, et al.. (2021). Geriatric nutritional risk index predicts cancer prognosis in patients with local advanced rectal cancer undergoing chemoradiotherapy followed by curative surgery. World Journal of Surgical Oncology. 19(1). 34–34. 23 indexed citations
9.
Ohi, Masaki, Yuji Toiyama, Takashi Ichikawa, et al.. (2020). Billroth-I Reconstruction with Overlap Anastomosis Using an EndoWrist Linear Stapler After Robotic Distal Gastrectomy. Journal of Laparoendoscopic & Advanced Surgical Techniques. 30(10). 1117–1121. 1 indexed citations
10.
11.
Yamamoto, Akira, Yuji Toiyama, Yoshinaga Okugawa, et al.. (2020). Clinical implications of the preoperative lymphocyte C-reactive protein ratio in esophageal cancer patients. Surgery Today. 51(5). 745–755. 24 indexed citations
12.
Fujikawa, Hiroyuki, Yuji Toiyama, Yasuhiro Inoue, et al.. (2017). Prognostic Impact of Preoperative Albumin–to–Globulin Ratio in Patients with Colon Cancer Undergoing Surgery with Curative Intent. Anticancer Research. 37(3). 1335–1342. 43 indexed citations
13.
Nagano, Yuka, Yuji Toiyama, Yoshinaga Okugawa, et al.. (2016). MicroRNA-7 Is Associated with Malignant Potential and Poor Prognosis in Human Colorectal Cancer. Anticancer Research. 36(12). 6521–6526. 20 indexed citations
14.
Imaoka, Hiroki, Yuji Toiyama, Hiroyuki Fujikawa, et al.. (2016). Circulating microRNA-1290 as a novel diagnostic and prognostic biomarker in human colorectal cancer. Annals of Oncology. 27(10). 1879–1886. 126 indexed citations
15.
Toiyama, Yuji, Takahito Kitajima, Hiroki Imaoka, et al.. (2016). miRNA-503 Promotes Tumor Progression and Is Associated with Early Recurrence and Poor Prognosis in Human Colorectal Cancer. Oncology. 90(4). 221–231. 41 indexed citations
16.
Shimura, Tadanobu, Yuji Toiyama, Junichiro Hiro, et al.. (2016). Monitoring perioperative serum albumin can identify anastomotic leakage in colorectal cancer patients with curative intent. Asian Journal of Surgery. 41(1). 30–38. 31 indexed citations
17.
Hur, Keun, Yuji Toiyama, Yoshinaga Okugawa, et al.. (2015). Circulating microRNA-203 predicts prognosis and metastasis in human colorectal cancer. Gut. 66(4). 654–665. 161 indexed citations
18.
Okita, Yoshiki, Toshimitsu Araki, Junichiro Hiro, et al.. (2015). Systemic Acute-phase Response in Laparoscopic and Open Ileal Pouch Anal Anastomosis in Patients With Ulcerative Colitis. Surgical Laparoscopy Endoscopy & Percutaneous Techniques. 25(5). 424–429. 2 indexed citations
19.
Saigusa, Susumu, Masaki Ohi, Hiroki Imaoka, et al.. (2014). A Case of Laparoscopic Retrieval of a Retained Capsule Endoscope Caused by Ileal Stricture. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 75(5). 1320–1323.
20.
Saigusa, Susumu, et al.. (2014). Aortoduodenal syndrome in a patient receiving maintenance haemodialysis. BMJ Case Reports. 2014. bcr2014206326–bcr2014206326. 1 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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