Tadashi Koga

2.4k total citations
86 papers, 1.8k citations indexed

About

Tadashi Koga is a scholar working on Pulmonary and Respiratory Medicine, Surgery and Oncology. According to data from OpenAlex, Tadashi Koga has authored 86 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 34 papers in Pulmonary and Respiratory Medicine, 29 papers in Surgery and 18 papers in Oncology. Recurrent topics in Tadashi Koga's work include Gastric Cancer Management and Outcomes (14 papers), Gastrointestinal Tumor Research and Treatment (12 papers) and Gastrointestinal disorders and treatments (7 papers). Tadashi Koga is often cited by papers focused on Gastric Cancer Management and Outcomes (14 papers), Gastrointestinal Tumor Research and Treatment (12 papers) and Gastrointestinal disorders and treatments (7 papers). Tadashi Koga collaborates with scholars based in Japan, United States and France. Tadashi Koga's co-authors include Yoshihiko Maehara, Yoshihiro Kakeji, Eriko Tokunaga, Kazuya Akahoshi, Masafumi Oya, Yuki Shiratsuchi, K Sugimachi, Shota Hasuda, Keizō Sugimachi and Eiji Oki and has published in prestigious journals such as SHILAP Revista de lepidopterología, Scientific Reports and British journal of surgery.

In The Last Decade

Tadashi Koga

79 papers receiving 1.7k citations

Peers

Countries citing papers authored by Tadashi Koga

Since Specialization

Citations

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

Fields of papers citing papers by Tadashi Koga

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Tadashi Koga

This figure shows the co-authorship network connecting the top 25 collaborators of Tadashi Koga. A scholar is included among the top collaborators of Tadashi Koga 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 Tadashi Koga. Tadashi Koga 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	Risk Factors of Postoperative Complication and Hospital Mortality after Colorectal Perforation Surgery 2024 ·SHILAP Revista de lepidopterología ·Kensuke Kudou, (unknown), Takashi Motomura, Takafumi Yukaya, Tomonori Nakanoko, Yosuke Kuroda, Masahiro Okamoto, Tadashi Koga, Yo‐ichi Yamashita	7
2	Clinical Impact of Skeletal Muscle Mass and Nutritional Status in Patients with Recurrent or Advanced Gastric Cancer Treated with Nivolumab 2024 ·Oncology ·Qingjiang Hu, (unknown), Takafumi Yukaya, (unknown), (unknown), Tomonori Nakanoko, Koji Ando, (unknown), Yasue Kimura, Tadashi Koga, Tetsuya Kusumoto, Eiji Oki, Tomoharu Yoshizumi	0
3	Validity of laparoscopic surgery for lower gastrointestinal perforations 2024 ·Asian Journal of Endoscopic Surgery ·Kensuke Kudou, (unknown), (unknown), (unknown), (unknown), Takashi Motomura, Takafumi Yukaya, Tomonori Nakanoko, Yosuke Kuroda, Masahiro Okamoto, Tadashi Koga, Yo‐ichi Yamashita, Eiji Oki, Tomoharu Yoshizumi	1
4	Endoscopic Ultrasonography-Guided Fine-Needle Aspiration for Duodenal Subepithelial Lesions Showing a Hypoechoic Mass on Endoscopic Ultrasound Imaging 2023 ·The Turkish Journal of Gastroenterology ·(unknown), Kazuya Akahoshi, Yuki Shiratsuchi, Shinichi Tamura, (unknown), (unknown), Yoshihiro Ohishi, Kanako Inoue, Tadashi Koga, Hidenobu Koga	2
5	Prognostic significance of a novel index score based on the inflammation‐based prognostic scores of patients with colorectal cancer 2023 ·Journal of Gastroenterology and Hepatology ·Kensuke Kudou, (unknown), Yasuo Tsuda, (unknown), Hideo Uehara, Rintaro Yoshida, Tadashi Koga, Yo‐ichi Yamashita, Yoshihisa Sakaguchi, Tetsuya Kusumoto	8
6	A Case of Fulminant Amoebic Colitis with Total Colon Necrosis 2023 ·The Japanese Journal of Gastroenterological Surgery ·Hitoshi Iwasaki, Takafumi Yukaya, (unknown), (unknown), (unknown), Hirotada Tajiri, (unknown), Kenji Taketani, Hiroto Kayashima, Yosuke Kuroda, (unknown), (unknown), Tadashi Koga	0
7	Use of a Healthcare Claims Database for Post-Marketing Safety Assessments of Eribulin in Japan: A Comparative Assessment with a Prospective Post-Marketing Surveillance Study 2019 ·Drugs - Real World Outcomes ·(unknown), Toshiyuki Matsuoka, (unknown), Tadashi Koga, (unknown), (unknown)	8
8	Assessment of risk factors for non-specific chronic disabling low back pain in Japanese workers—findings from the CUPID (Cultural and Psychosocial Influences on Disability) study 2018 ·Industrial Health ·Ko Matsudaira, Masaya Takahashi, (unknown), (unknown), (unknown), Tadashi Koga	4
9	Effects of moxifloxacin on the proarrhythmic surrogate markers in healthy Filipino subjects: Exposure-response modeling using ECG data of thorough QT/QTc study 2018 ·Journal of Pharmacological Sciences ·(unknown), Yuji Nakamura, Kiyotaka Hoshiai, Takashi Hayashi, Tadashi Koga, Ai Goto, (unknown), (unknown), (unknown), Hiroko Izumi‐Nakaseko, Kentaro Ando, Atsuhiko T. Naito, Atsushi Sugiyama	13
10	Meta-analysis of the efficacies of amiodarone and nifekalant in shock-resistant ventricular fibrillation and pulseless ventricular tachycardia 2017 ·Scientific Reports ·Shiho Sato, Yoshito Zamami, Toru Imai, Satoshi Tanaka, Toshihiro Koyama, Takahiro Niimura, Masayuki Chuma, Tadashi Koga, Kenshi Takechi, (unknown), Yutaka Kondo, Yuki Izawa‐Ishizawa, Toshiaki Sendo, Hironori Nakura, Keisuke Ishizawa	7
11	Assessment of potential risk factors for new onset disabling low back pain in Japanese workers: findings from the CUPID (cultural and psychosocial influences on disability) study 2017 ·BMC Musculoskeletal Disorders ·(unknown), Ko Matsudaira, Takayuki Sawada, Tadashi Koga, (unknown), Tatsuya Isomura, David Coggon	19
12	Detection of circulating gastric cancer cells in peripheral blood using real time quantitative RT-PCR. 2008 ·PubMed ·Tadashi Koga, Eriko Tokunaga, (unknown), Eiji Oki, Shinya Oda, Ikuo Takahashi, Yoshihiro Kakeji, Hideo Baba, Yoshihiko Maehara	37
13	Serum adiponectin concentrations correlate with severity of rheumatoid arthritis evaluated by extent of joint destruction 2008 ·Clinical Rheumatology ·Kosuke Ebina, Atsunori Fukuhara, Wataru Ando, Makoto Hirao, Tadashi Koga, Kazuya Oshima, Morihiro Matsuda, Kazuhisa Maeda, Tadashi Nakamura, Takahiro Ochi, Iichiro Shimomura, Hideki Yoshikawa, Jun Hashimoto	80
14	Coexistence of the loss of heterozygosity at the PTEN locus and HER2 overexpression enhances the Akt activity thus leading to a negative progesterone receptor expression in breast carcinoma 2006 ·Breast Cancer Research and Treatment ·Eriko Tokunaga, Eiji Oki, Yasue Kimura, Takeharu Yamanaka, Akinori Egashira, (unknown), Tadashi Koga, Masaru Morita, Yoshihiro Kakeji, Yoshihiko Maehara	38
15	Trastuzumab and breast cancer: developments and current status 2006 ·International Journal of Clinical Oncology ·Eriko Tokunaga, Eiji Oki, (unknown), Tadashi Koga, Akinori Egashira, Masaru Morita, Yoshihiro Kakeji, Yoshihiko Maehara	81
16	Heparanase gene expression and metastatic potential in human gastric cancer. 2002 ·PubMed ·Kazuya Endo, Yoshihiko Maehara, Hideo Baba, Eriko Tokunaga, Tadashi Koga, Yasuharu Ikeda, Yasushi Toh, Shunji Kohnoe, Takeshi Okamura, Motowo Nakajima, Keizō Sugimachi	26
17	Dihydropyrimidine dehydrogenase levels in nonsmall-cell lung cancer tissues 2002 ·International Journal of Clinical Oncology ·Tomohiro Yano, Tadashi Koga, (unknown), (unknown)	6
18	The biologic features of intramucosal gastric carcinoma with lymph node metastasis 2002 ·Surgery ·Akira Kabashima, Yoshihiko Maehara, Tadashi Koga, Yoshihiro Kakeji, Keizō Sugimachi	4
19	Leiomyosarcoma of the Greater Omentum with Liver Metastasis: Report of a Case 2002 ·Surgery Today ·Tadashi Koga, Tetsuya Kusumoto, Yoshihiro Kakeji, Keiji Kishikawa, Yoshihiko Maehara, (unknown), Koji Irie, Keizō Sugimachi	5
20	On the Relation of No-water-supply Days to Survival Percent and Soil Water Content in Trees for Landscaping 1986 ·Journal of the Japanese Institute of Landscape Architects ·(unknown), Tadashi Koga, Yoshimitsu Aoki, (unknown)	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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