Kohei Ishiyama

3.7k total citations · 1 hit paper
102 papers, 2.7k citations indexed

About

Kohei Ishiyama is a scholar working on Surgery, Hepatology and Epidemiology. According to data from OpenAlex, Kohei Ishiyama has authored 102 papers receiving a total of 2.7k indexed citations (citations by other indexed papers that have themselves been cited), including 46 papers in Surgery, 39 papers in Hepatology and 25 papers in Epidemiology. Recurrent topics in Kohei Ishiyama's work include Immune Cell Function and Interaction (17 papers), Liver Disease and Transplantation (16 papers) and Organ Transplantation Techniques and Outcomes (16 papers). Kohei Ishiyama is often cited by papers focused on Immune Cell Function and Interaction (17 papers), Liver Disease and Transplantation (16 papers) and Organ Transplantation Techniques and Outcomes (16 papers). Kohei Ishiyama collaborates with scholars based in Japan, United States and Switzerland. Kohei Ishiyama's co-authors include Hideki Ohdan, Toshimasa Asahara, A. Nishimura, Hironori Itoh, Motoyuki Ashikari, Makoto Kobayashi, G. S. Khush, Tamio Saito, Hidemi Kitano and Makoto Matsuoka and has published in prestigious journals such as Nature, Journal of Clinical Investigation and SHILAP Revista de lepidopterología.

In The Last Decade

Kohei Ishiyama

95 papers receiving 2.6k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

A mutant gibberellin-synthesis gene in rice

2002 1.1k citations Kohei Ishiyama et al. profile →

Peers

Countries citing papers authored by Kohei Ishiyama

Since Specialization

Citations

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

Fields of papers citing papers by Kohei Ishiyama

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kohei Ishiyama

This figure shows the co-authorship network connecting the top 25 collaborators of Kohei Ishiyama. A scholar is included among the top collaborators of Kohei Ishiyama 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 Kohei Ishiyama. Kohei Ishiyama 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	Regional changes in shear modulus of the biceps femoris long head following load application to the biceps femoris short head 2025 ·Journal of Biomechanics ·(unknown), (unknown), (unknown), Kohei Ishiyama, Kunihisa Kozawa, Koichi Sekiguchi, Kanna Nagaishi, (unknown), (unknown), Jurdan Mendiguchía, (unknown), Nobuhiro Aoki, Masaki Katayose, Keigo Taniguchi	0
2	C1q Binding Ability for Prior Risk Assessment of Acute Antibody-Mediated Rejection in ABO-Incompatible Kidney Transplantation 2024 ·Transplant International ·Yuko Miwa, Kenta Iwasaki, Kenta Murotani, Manabu Okada, Takaharu Nagasaka, Yoshihiko Watarai, Asami Takeda, (unknown), (unknown), Kohei Ishiyama, Shoichi Maruyama, Takaaki Kobayashi	1
3	Low skeletal muscle mass index is independently associated with low bone mineral density in kidney transplant recipients: a retrospective observational cohort study 2024 ·Journal of Nephrology ·(unknown), Yutaka Matsuoka, Mayuko Hori, Makoto Tsujita, Kaoru Yasuda, (unknown), Kohei Ishiyama, Kazuharu Uchida, Kunio Morozumi, Takaaki Kobayashi	2
4	Passive muscle tension changes in the biceps femoris long head after biceps femoris short head detachment: A human cadaver study 2024 ·Journal of Biomechanics ·(unknown), (unknown), (unknown), Kohei Ishiyama, Kunihisa Kozawa, Kota Watanabe, (unknown), (unknown), (unknown), Masaki Katayose, Keigo Taniguchi	3
5	198P The Efficacy and safety of adjuvant nivolumab therapy after neoadjuvant docetaxel plus cisplatin, 5-FU therapy for resectable locally advanced esophageal squamous cell carcinoma 2024 ·Annals of Oncology ·(unknown), Satoshi Yamamoto, (unknown), (unknown), Hiroshi Imazeki, (unknown), Kenichi Yokoyama, Yoshitaka Honma, Daisuke Kurita, Kohei Ishiyama, (unknown), Hiroyuki Daiko, Yasuo Seto, Ken Kato	0
6	Impact of a new liver immune status index among patients with hepatocellular carcinoma after initial hepatectomy 2023 ·Annals of Gastroenterological Surgery ·Yuki Imaoka, Masahiro Ohira, (unknown), (unknown), (unknown), Koki Sato, (unknown), Ryosuke Nakano, Takuya Yano, (unknown), Shintaro Kuroda, Hiroyuki Tahara, Kentaro Ide, Kohei Ishiyama, Tsuyoshi Kobayashi, Yuka Tanaka, Hideki Ohdan	5
7	Cotransplantation of preactivated mesenchymal stem cells improves intraportal engraftment of islets by inhibiting liver natural killer cells in mice 2019 ·American Journal of Transplantation ·(unknown), Kohei Ishiyama, (unknown), Yuka Tanaka, Hideki Ohdan	19
8	Effect of bevacizumab plus XELOX (CapeOX) chemotherapy on liver natural killer cell activity in colorectal cancer with resectable liver metastasis 2018 ·Annals of Gastroenterological Surgery ·(unknown), Kohei Ishiyama, Yuka Tanaka, Tsuyoshi Kobayashi, (unknown), (unknown), (unknown), Kazuhiro Taguchi, Junko Tanaka, Koji Arihiro, Hideki Ohdan	4
9	Predictive Independent Factors for Extrahepatic Metastasis of Hepatocellular Carcinoma Following Curative Hepatectomy 2017 ·Anticancer Research ·(unknown), Tsuyoshi Kobayashi, Kohei Ishiyama, Kentaro Ide, Masahiro Ohira, Hiroyuki Tahara, Shintaro Kuroda, Michinori Hamaoka, (unknown), (unknown), (unknown), Hideki Ohdan	12
10	Biliary-duodenal anastomosis using magnetic compression following massive resection of small intestine due to strangulated ileus after living donor liver transplantation: a case report 2017 ·SHILAP Revista de lepidopterología ·Ryusuke Saito, Hiroyuki Tahara, Seiichi Shimizu, Masahiro Ohira, Kentaro Ide, Kohei Ishiyama, Tsuyoshi Kobayashi, Hideki Ohdan	11
11	Elective laparoscopic deroofing to treat the spontaneous rupture of a large simple liver cyst: a case report 2016 ·Surgical Case Reports ·Yuki Imaoka, Masahiro Ohira, Tsuyoshi Kobayashi, Seiichi Shimizu, Hiroyuki Tahara, Shintaro Kuroda, Kentaro Ide, Kohei Ishiyama, Hideki Ohdan	7
12	Different sensitivity of rituximab-treatment to B-cells between ABO-incompatible kidney and liver transplantation 2016 ·Human Immunology ·Hiroshi Morimoto, Kentaro Ide, Yuka Tanaka, Kohei Ishiyama, Masahiro Ohira, Hiroyuki Tahara, (unknown), Junko Tanaka, Hideki Ohdan	12
13	Clinical Efficacy of Simultaneous Splenectomy in Liver Transplant Recipients With Hepatitis C Virus 2014 ·Transplantation Proceedings ·Hiroshi Morimoto, Kohei Ishiyama, (unknown), Masahiro Ohira, Kentaro Ide, Yuka Tanaka, Hiroyuki Tahara, Yuji Teraoka, (unknown), Takayuki Abe, Shinji Hashimoto, (unknown), Naoki Tanimine, (unknown), Seiichi Shimizu, Hiroshi Sakai, Takuya Yano, Hirotaka Tashiro, Hideki Ohdan	6
14	Maintaining functional islets through encapsulation in an injectable saccharide–peptide hydrogel 2013 ·Biomaterials ·(unknown), Jeffrey Rawson, Keiko Omori, Kohei Ishiyama, Davoud Mozhdehi, (unknown), T. Ito, Zhibin Guan, Yoko Mullen	31
15	Adoptive immunotherapy with liver allograft–derived lymphocytes induces anti-HCV activity after liver transplantation in humans and humanized mice 2009 ·Journal of Clinical Investigation ·Masahiro Ohira, Kohei Ishiyama, Yuka Tanaka, (unknown), Yuka Igarashi, Hirotaka Tashiro, Nobuhiko Hiraga, Michio Imamura, Naoya Sakamoto, Toshimasa Asahara, Kazuaki Chayama, Hideki Ohdan	71
16	Hepatic venous outflow obstruction after right lateral sector living-donor liver transplantation, treated by insertion of an expandable metallic stent 2008 ·Journal of Hepato-Biliary-Pancreatic Surgery ·(unknown), Hirotaka Tashiro, Toshiyuki Itamoto, Naoyuki Toyota, Toshihiko Kohashi, Hironobu Amano, Hideki Ohdan, Kohei Ishiyama, Akihiko Oshita, Toshimasa Asahara	5
17	Reconstruction of the middle hepatic vein tributaries draining segments V and VIII of a right liver graft by using the recipient’s own middle hepatic vein and vascular closure staples 2008 ·Surgery Today ·Hirotaka Tashiro, Toshiyuki Itamoto, Hideki Ohdan, Akihiko Oshita, Yasuhiro Fudaba, Kohei Ishiyama, Toshihiko Kohashi, Hironobu Amano, Saburo Fukuda, Toshimasa Asahara	4
18	Liver Sinusoidal Endothelial Cells That Endocytose Allogeneic Cells Suppress T Cells with Indirect Allospecificity 2006 ·The Journal of Immunology ·Daisuke Tokita, (unknown), Hideki Ohdan, Takashi Onoe, Hidetaka Hara, Yuka Tanaka, Kohei Ishiyama, Hiroshi Mitsuta, Kentaro Ide, Koji Arihiro, Toshimasa Asahara	37
19	Antibody‐ and complement‐independent phagocytotic and cytolytic activities of human macrophages toward porcine cells 2005 ·Xenotransplantation ·Kentaro Ide, Hideki Ohdan, Takaaki Kobayashi, Hidetaka Hara, Kohei Ishiyama, Toshimasa Asahara	57
20	Magnetic Actuator Assists in Guiding a Colonoscope. 2003 ·Journal of the Magnetics Society of Japan ·M. Sendoh, Kohei Ishiyama, Yoshihiro SUDA, Kenichi Arai	2

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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