Hiroki Koyama

3.1k total citations
110 papers, 2.4k citations indexed

About

Hiroki Koyama is a scholar working on Cancer Research, Pathology and Forensic Medicine and Oncology. According to data from OpenAlex, Hiroki Koyama has authored 110 papers receiving a total of 2.4k indexed citations (citations by other indexed papers that have themselves been cited), including 66 papers in Cancer Research, 42 papers in Pathology and Forensic Medicine and 39 papers in Oncology. Recurrent topics in Hiroki Koyama's work include Breast Cancer Treatment Studies (54 papers), Breast Lesions and Carcinomas (37 papers) and Breast Implant and Reconstruction (18 papers). Hiroki Koyama is often cited by papers focused on Breast Cancer Treatment Studies (54 papers), Breast Lesions and Carcinomas (37 papers) and Breast Implant and Reconstruction (18 papers). Hiroki Koyama collaborates with scholars based in Japan, United States and Thailand. Hiroki Koyama's co-authors include Kazuyoshi Motomura, Hideo Inaji, Shinzaburo Noguchi, Takeshi Iwanaga, Yoshifumi Komoike, Shingi Imaoka, Tsutomu Kasugai, Hiroshi Furukawa, Yukio Nishizawa and K.‐H. William Lau and has published in prestigious journals such as JNCI Journal of the National Cancer Institute, Cancer and Annals of Surgery.

In The Last Decade

Hiroki Koyama

104 papers receiving 2.3k citations

Peers

Countries citing papers authored by Hiroki Koyama

Since Specialization

Citations

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

Fields of papers citing papers by Hiroki Koyama

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroki Koyama

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

#	Work	Indexed citations
1	Comprehensive and species-specific detection of mackerels of the genus Scomber in processed foods using SYBR Green-based real-time PCR 2023 ·Fisheries Science ·(unknown), Yuki Sano, Hiroki Koyama, Kouichi Kurose	1
2	Cloning, Expression, and Localization of Two Types of Fast Skeletal Myosin Heavy Chain Genes From Black Tiger and Pacific White Shrimps 2012 ·Journal of Experimental Zoology Part A Ecological Genetics and Physiology ·Hiroki Koyama, (unknown), (unknown), Shugo Watabe	16
3	A pilot study of wider use of accelerated partial Breast irradiation: Intraoperative margin-directed re-excision combined with sole high-dose-rate interstitial brachytherapy 2006 ·Breast Cancer ·Takayuki Nose, Y. Komoike, Ken Yoshida, Masahiko Koizumi, Kazuyoshi Motomura, Tsutomu Kasugai, Hideo Inaji, Kinji Nishiyama, Hiroki Koyama, Takuyo Kozuka, Kotaro Gomi, Masahiko Oguchi, Yutaka Takahashi, (unknown), (unknown)	17
4	Breast-conserving treatment after neoadjuvant chemotherapy in large breast cancer 2002 ·Breast Cancer ·Hideo Inaji, Yoshifumi Komoike, Kazuyoshi Motomura, Tsutomu Kasugai, Yuka Sawai, Masahiko Koizumi, Takayuki Nose, Hiroki Koyama	8
5	Mediastinal lymph node involvement as the initial manifestation of occult thyroid cancer in the surgical treatment of lung cancer: Report of a case 1999 ·Surgery Today ·Masahiko Higashiyama, Ken Kodama, Hideoki Yokouchi, Koji Takami, Kazuyoshi Motomura, Hideo Inaji, Hiroki Koyama	7
6	A Randomized Controlled Comparative Study of Oral Medroxyprogesterone Acetate 1,200 and 600 mg in Patients with Advanced or Recurrent Breast Cancer 1999 ·Oncology ·Hiroki Koyama, Takeshi Tominaga, Kazuaki Asaishi, Rikiya Abe, Yuichi Iino, Kohji Enomoto, Shigeto Miura, Yasuo Nomura, Hiroaki Nakazato, Osahiko Abe	4
7	Results of Questionnaires Concerning Breast Cancer Surgery in Japan: An Update in 1998 1998 ·Breast Cancer ·Shigeto Miura, Hiroki Koyama	4
8	Immunocytochemical staining of c-erbB-2 oncoprotein in cytologic smears of breast carcinoma focusing on the intraductal component and cytologic morphology. 1998 ·The Journal of the Japanese Society of Clinical Cytology ·(unknown), Sachiko Nagumo, Takeshi Horai, Tsutomu Kasugai, Hiroki Koyama	0
9	Japanese refiner solves problems in resid desulfurization unit 1995 ·Oil & gas journal ·Hiroki Koyama, (unknown), (unknown), (unknown)	2
10	Simple changes reduce catalyst deactivation, pressure-drop buildup 1995 ·Oil & gas journal ·Hiroki Koyama, (unknown), (unknown), (unknown)	2
11	Retention of the Right Pleural Effusion after Hepatectomy in Patients with Hepatocellular Carcinoma. 1993 ·The Japanese Journal of Gastroenterological Surgery ·Hiroaki Nagano, Yo Sasaki, Shingi Imaoka, Seizo Masutani, Osamu Ishikawa, Hiroaki Ohigashi, Hiroshi Furukawa, T Kabuto, Masahiro Hiratsuka, Masao Kameyama, Hiroki Koyama, Takeshi Iwanaga	1
12	Inhibitory Effect of a Somatostatin Analogue (SMS 201–995) on the Growth of Androgen‐dependent Mouse Mammary Tumor (Shionogi Carcinoma 115) 1993 ·Japanese Journal of Cancer Research ·Shinzaburo Noguchi, Yasuko Nishizawa, Kazuyoshi Motomura, Hideo Inaji, Shingi Imaoka, Hiroki Koyama, Keishi Matsumoto	4
13	Influence of 1α,25-Dihydroxy vitamin D<sub>3</sub> on the Development and Steroid Hormone Receptor Contents of DMBA-Induced Rat Mammary Tumors 1989 ·Oncology ·Shinzaburo Noguchi, Hideaki Tahara, Keisuke Miyauchi, Hiroki Koyama	5
14	Influence of Tamoxifen‐Medroxyprogesterone Sequential Therapy on Estrogen and Progesterone Receptor Contents of Breast Cancer 1989 ·Japanese Journal of Cancer Research ·Shinzaburo Noguchi, Hitoshi Yamamoto, Hideo Inaji, Shingi Imaoka, Hiroki Koyama	6
15	Indication of proximal gastrectomy for early gastric cancer : Pre-and intraoperative examination. 1987 ·The Japanese Journal of Gastroenterological Surgery ·Masahiro Hiratsuka, Hiroaki Ohhigashi, Masao Kameyama, Yo Sasaki, Osamu Ishikawa, T Kabuto, Ichiro Fukuda, Hiroshi Furukawa, Shingi Imaoka, Hiroki Koyama, Takeshi Iwanaga	1
16	Advanced hepatocellular carcinoma with tumor thrombus in the right portal vein and multiple intra-hepatic metastasis - A case report of effective combined therapy with hepatic resection and transcatherter arterial embolization. 1986 ·Kanzo ·Shoji Nakamori, Shingi Imaoka, Yo Sasaki, Hiroaki Ohigashi, Osamu Ishikawa, Hiroki Koyama, Takeshi Iwanaga, Seiichi Kawamoto, Makoto Fujita, (unknown)	2
17	LIVER RESECTION FOR SMALL HEPATOCELLULAR CARCINOMA 1985 ·The Japanese Journal of Gastroenterological Surgery ·Shingi Imaoka, Yo Sasaki, Osamu Ishikawa, Hiroaki Ohigashi, Hiroki Koyama, (unknown), Takeshi Iwanaga	1
18	MULTIPLE GASTRIC CANCERS 1985 ·The Japanese Journal of Gastroenterological Surgery ·Hiroshi Furukawa, Takeshi Iwanaga, (unknown), Masahiro Hiratsuka, Hiroaki Ohigashi, Masao Kameyama, Yo Sasaki, Osamu Ishikawa, T Kabuto, Ichiro Fukuda, Shingi Imaoka, Hiroki Koyama, (unknown)	8
19	Effect of sex hormones on carcinogenesis of experimental gastric cancer -A chronological study- 1983 ·Hiroshi Furukawa, Takeshi Iwanaga, (unknown), Hiroki Koyama, Haruo Taniguchi	2
20	CORRELATION OF STUMP RECURRENCE WITH DISTANCE BETWEEN RESECTION LINE AND CANCER INVASION OF CARCINOMA OF GASTRIC CARDIA 1978 ·The Japanese Journal of Gastroenterological Surgery ·Ichiro Fukuda, Takeshi Iwanaga, T. Terasawa, Yukitoshi AOKI, (unknown), Hiroki Koyama, Hiroshi Furukawa	1

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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