Naoki Hiki

9.4k total citations
242 papers, 6.6k citations indexed

About

Naoki Hiki is a scholar working on Pulmonary and Respiratory Medicine, Surgery and Gastroenterology. According to data from OpenAlex, Naoki Hiki has authored 242 papers receiving a total of 6.6k indexed citations (citations by other indexed papers that have themselves been cited), including 198 papers in Pulmonary and Respiratory Medicine, 131 papers in Surgery and 108 papers in Gastroenterology. Recurrent topics in Naoki Hiki's work include Gastric Cancer Management and Outcomes (184 papers), Metastasis and carcinoma case studies (102 papers) and Gastrointestinal Tumor Research and Treatment (97 papers). Naoki Hiki is often cited by papers focused on Gastric Cancer Management and Outcomes (184 papers), Metastasis and carcinoma case studies (102 papers) and Gastrointestinal Tumor Research and Treatment (97 papers). Naoki Hiki collaborates with scholars based in Japan, China and United States. Naoki Hiki's co-authors include Souya Nunobe, Toshiharu Yamaguchi, Takeshi Sano, Tetsu Fukunaga, Shigekazu Ohyama, Koshi Kumagai, Masanori Tokunaga, Manabu Ohashi, Yasuyuki Seto and Michio Kaminishi and has published in prestigious journals such as Journal of Clinical Oncology, SHILAP Revista de lepidopterología and PLoS ONE.

In The Last Decade

Naoki Hiki

229 papers receiving 6.5k citations

Peers

Naoki Hiki

PRM

SURGE

GASTR

ONCOL

PHYSI

Ji Yong Ahn South Korea

Jae J. Kim South Korea

Kun Yang China

Johannes Zacherl Austria

Basil J. Ammori United Kingdom

Meinhard Classen Germany

Eric S. Hungness United States

Christos Zavos Greece

Hong Joo Kim South Korea

Chong Il Sohn South Korea

Ji Yong Ahn South Korea

Naoki Hiki

2.1k ×0.4

PRM

2.1k ×0.6

SURGE

1.1k ×0.4

GASTR

519 ×0.4

ONCOL

90 ×0.2

PHYSI

Citations per year, relative to Naoki Hiki Naoki Hiki (= 1×) peers Ji Yong Ahn

Countries citing papers authored by Naoki Hiki

Since Specialization

Citations

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

Fields of papers citing papers by Naoki Hiki

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Naoki Hiki

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

Washio, Marie, Keishi Yamashita, Hiroki Harada, et al.. (2025). Laparoscopic and Endoscopic Cooperative Surgery for Gastric Cancer as an Alternative Treatment in Elderly Patients: A Prospective Observational Study. Annals of Gastroenterological Surgery. 10(2). 405–413. 1 indexed citations

Yamamoto, Kazuyoshi, Satoshi Hattori, Takeshi Omori, et al.. (2025). Defining Low Muscle Mass in Cancer Patients: Sex-Specific Computed Tomography-Derived Cutoff Values and Survival Impact—A Multicenter Cohort Study. Annals of Surgical Oncology. 32(12). 9014–9021.

Hayami, Masaru, Manabu Ohashi, Satoshi Ida, et al.. (2020). A “Just Enough” Gross Proximal Margin Length Ensuring Pathologically Complete Resection in Distal Gastrectomy for Gastric Cancer. SHILAP Revista de lepidopterología. 1(2). e026–e026. 11 indexed citations

Hosoda, Kei, Mizutomo Azuma, Chikatoshi Katada, et al.. (2020). A phase I study of docetaxel/oxaliplatin/S-1 (DOS) combination neoadjuvant chemotherapy for patients with locally advanced adenocarcinoma of the esophagogastric junction. International Journal of Clinical Oncology. 25(6). 1090–1097. 3 indexed citations

Shoji, Yoshiaki, Souya Nunobe, Satoshi Ida, et al.. (2019). Surgical outcomes and risk assessment for anastomotic complications after laparoscopic proximal gastrectomy with double-flap technique for upper-third gastric cancer. Gastric Cancer. 22(5). 1036–1043. 46 indexed citations

Okumura, Yasuhiro, Manabu Takamatsu, Manabu Ohashi, et al.. (2018). Gastric Adenocarcinoma of Fundic Gland Type with Aggressive Transformation and Lymph Node Metastasis: a Case Report. Journal of the Korean Gastric Cancer Association. 18(4). 409–409. 16 indexed citations

Kawakatsu, Shoji, Manabu Ohashi, Naoki Hiki, et al.. (2017). Use of endoscopy to determine the resection margin during laparoscopic gastrectomy for cancer. British journal of surgery. 104(13). 1829–1836. 37 indexed citations

Nunobe, Souya & Naoki Hiki. (2017). Function-preserving surgery for gastric cancer: current status and future perspectives. Translational Gastroenterology and Hepatology. 2(9). 77–77. 25 indexed citations

Kumagai, Koshi, Naoki Hiki, Souya Nunobe, et al.. (2016). Metastasis to the lymph nodes along the proper hepatic artery from adenocarcinoma of the stomach. Langenbeck s Archives of Surgery. 401(5). 677–685. 4 indexed citations

10.

Kiyokawa, Takashi, Naoki Hiki, Souya Nunobe, et al.. (2016). Preserving infrapyloric vein reduces postoperative gastric stasis after laparoscopic pylorus-preserving gastrectomy. Langenbeck s Archives of Surgery. 402(1). 49–56. 25 indexed citations

11.

Hiki, Naoki, Souya Nunobe, Manabu Ohashi, et al.. (2015). Clinicopathological features of gastric cancer in young patients. Gastric Cancer. 19(2). 472–478. 119 indexed citations

12.

Kurokawa, Yukinori, Naoki Hiki, Takaki Yoshikawa, et al.. (2014). Mediastinal lymph node metastasis and recurrence in adenocarcinoma of the esophagogastric junction. Surgery. 157(3). 551–555. 72 indexed citations

13.

Takemura, Nobuyuki, Akio Saiura, Rintaro Koga, et al.. (2012). Long-term outcomes after surgical resection for gastric cancer liver metastasis: an analysis of 64 macroscopically complete resections. Langenbeck s Archives of Surgery. 397(6). 951–957. 101 indexed citations

14.

Nunobe, Souya, Naoki Hiki, Shigekazu Ohyama, et al.. (2010). Outcome of surgical treatment for patients with locoregional recurrence of gastric cancer. Langenbeck s Archives of Surgery. 396(2). 161–166. 13 indexed citations

15.

Nunobe, Souya, Shigekazu Ohyama, Masanori Tokunaga, et al.. (2009). The Approach for Advanced Gastric Cancer with Esophageal Invasion: which is Better, a Transthoracic or a Transabdominohiatal Approach ?. The Japanese Journal of Gastroenterological Surgery. 42(8). 1353–1359.

16.

Hiki, Naoki, Toshiharu Yamaguchi, Souya Nunobe, et al.. (2008). The benefits of standardizing the operative procedure for the assistant in laparoscopy-assisted gastrectomy for gastric cancer. Langenbeck s Archives of Surgery. 393(6). 963–971. 36 indexed citations

17.

Tokunaga, Masanori, Shigekazu Ohyama, Naoki Hiki, et al.. (2007). A Case of Advanced Gastric Cancer-Histological CR was Attained by One Course of Neoadjuvant Chemotherapy with S-1/CDDP. The Japanese Journal of Gastroenterological Surgery. 40(8). 1479–1484. 3 indexed citations

18.

Hiki, Naoki, Shouji Shimoyama, H. Yamaguchi, Keisuke Kubota, & Michio Kaminishi. (2006). Laparoscopy-Assisted Pylorus-Preserving Gastrectomy with Quality Controlled Lymph Node Dissection in Gastric Cancer Operation. Journal of the American College of Surgeons. 203(2). 162–169. 52 indexed citations

19.

Shimoyama, Shouji, Kazuhiro Imamura, Naoki Hiki, et al.. (2005). Performance of outpatient regimen of S-1 in combination with fractional cisplatin for advanced or recurrent gastric cancers: a phase I study. International Journal of Clinical Oncology. 10(4). 251–255. 5 indexed citations

20.

Kubota, Keisuke, Naoki Hiki, Nobuyuki Shimizu, et al.. (2003). Utility of [13C] Urea Breath Test for Helicobacter pylori Detection in Partial Gastrectomy Patients. Digestive Diseases and Sciences. 48(11). 2135–2138. 19 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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