S. Ohkawa

2.1k total citations · 1 hit paper
39 papers, 1.4k citations indexed

About

S. Ohkawa is a scholar working on Oncology, Pulmonary and Respiratory Medicine and Surgery. According to data from OpenAlex, S. Ohkawa has authored 39 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Oncology, 10 papers in Pulmonary and Respiratory Medicine and 9 papers in Surgery. Recurrent topics in S. Ohkawa's work include Pancreatic and Hepatic Oncology Research (12 papers), Cholangiocarcinoma and Gallbladder Cancer Studies (7 papers) and Colorectal Cancer Treatments and Studies (4 papers). S. Ohkawa is often cited by papers focused on Pancreatic and Hepatic Oncology Research (12 papers), Cholangiocarcinoma and Gallbladder Cancer Studies (7 papers) and Colorectal Cancer Treatments and Studies (4 papers). S. Ohkawa collaborates with scholars based in Japan and United States. S. Ohkawa's co-authors include Atsushi Yamadori, Mitsuaki Tabuchi, Etsuro Mori, Yukihiro Yoneda, Yukio Ohsumi, Junji Furuse, Akizumi Tsutsumi, Takashi Yoshida, Nobumasa Mizuno and Masaru Miyazaki and has published in prestigious journals such as Journal of Clinical Oncology, SHILAP Revista de lepidopterología and Neurology.

In The Last Decade

S. Ohkawa

37 papers receiving 1.3k citations

Hit Papers

1 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.

Gemcitabine alone or in combination with cisplatin in patients with biliary tract cancer: a comparative multicentre study in Japan

2010 541 citations Takuji Okusaka, Akira Fukutomi et al. British Journal of Cancer profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
S. Ohkawa Japan	14	658	622	481	407	199	39	1.4k
Vivek Misra United States	17	363 0.6×	262 0.4×	221 0.5×	389 1.0×	322 1.6×	76	1.6k
Tae‐Won Kim South Korea	20	577 0.9×	528 0.8×	731 1.5×	207 0.5×	200 1.0×	88	1.6k
Kety Hsieh Switzerland	18	208 0.3×	367 0.6×	232 0.5×	615 1.5×	339 1.7×	30	1.4k
Marc A. Lazzaro United States	20	131 0.2×	303 0.5×	168 0.3×	307 0.8×	528 2.7×	45	1.2k
P Adeleine France	19	147 0.2×	366 0.6×	84 0.2×	638 1.6×	613 3.1×	63	1.6k
Jason K. Wasserman Canada	19	200 0.3×	169 0.3×	132 0.3×	436 1.1×	583 2.9×	42	1.3k
Tomohiro Nakamura Japan	20	328 0.5×	289 0.5×	86 0.2×	205 0.5×	73 0.4×	87	1.3k
R. Ferguson United States	15	372 0.6×	1.2k 2.0×	196 0.4×	579 1.4×	651 3.3×	39	1.7k
Oliver Findling Switzerland	22	169 0.3×	693 1.1×	55 0.1×	696 1.7×	538 2.7×	57	1.5k
Dominick J. H. McCabe United Kingdom	22	161 0.2×	993 1.6×	82 0.2×	738 1.8×	650 3.3×	76	1.8k

Countries citing papers authored by S. Ohkawa

Since Specialization

Citations

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

Fields of papers citing papers by S. Ohkawa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of S. Ohkawa

This figure shows the co-authorship network connecting the top 25 collaborators of S. Ohkawa. A scholar is included among the top collaborators of S. Ohkawa 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 S. Ohkawa. S. Ohkawa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Ioka, Tatsuya, Yoshito Komatsu, Nobumasa Mizuno, et al.. (2017). Randomised phase II trial of irinotecan plus S-1 in patients with gemcitabine-refractory pancreatic cancer. British Journal of Cancer. 116(4). 464–471. 18 indexed citations

Ioka, Tatsuya, Takuji Okusaka, S. Ohkawa, et al.. (2015). Efficacy and safety of axitinib in combination with gemcitabine in advanced pancreatic cancer: subgroup analyses by region, including Japan, from the global randomized Phase III trial. Japanese Journal of Clinical Oncology. 45(5). 439–448. 29 indexed citations

Matsuyama, Masato, Hiroshi Ishii, Junji Furuse, et al.. (2014). Phase II trial of combination therapy of gemcitabine plus anti-angiogenic vaccination of elpamotide in patients with advanced or recurrent biliary tract cancer. Investigational New Drugs. 33(2). 490–495. 14 indexed citations

Kobayashi, Satoshi, Masayuki Ueno, S. Ohkawa, et al.. (2012). A Retrospective Study of S-1 Monotherapy as Second-line Treatment for Patients with Advanced Biliary Tract Cancer. Japanese Journal of Clinical Oncology. 42(9). 800–806. 19 indexed citations

Okusaka, Takuji, S. Ohkawa, Hiroyuki Isayama, et al.. (2012). Randomized Phase II Trial of S-1 versus S-1 Plus Oxaliplatin (SOX) in Patients with Gemcitabine Refractory Pancreatic Cancer. Annals of Oncology. 23. ix241–ix242. 1 indexed citations

Watanabe, T., Soichiro Morinaga, Makoto Akaike, et al.. (2012). The cellular level of histone H3 lysine 4 dimethylation correlates with response to adjuvant gemcitabine in Japanese pancreatic cancer patients treated with surgery. European Journal of Surgical Oncology. 38(11). 1051–1057. 20 indexed citations

Kumagai, Hiromichi, Ayumi Suzuki, Norihiro Kobayashi, et al.. (2011). Relaxin ameliorates salt-sensitive hypertension and renal fibrosis. Nephrology Dialysis Transplantation. 27(6). 2190–2197. 34 indexed citations

Takahashi, Ryuichi, Kazunari Ishii, Naokazu Miyamoto, et al.. (2010). Measurement of Gray and White Matter Atrophy in Dementia with Lewy Bodies Using Diffeomorphic Anatomic Registration through Exponentiated Lie Algebra: A Comparison with Conventional Voxel-Based Morphometry. American Journal of Neuroradiology. 31(10). 1873–1878. 49 indexed citations

Ueno, Makoto, S. Ohkawa, Yasunari Sakamoto, Kaoru Miyakawa, & Yohei Miyagi. (2009). The analysis of EGFR expression and EGFR mutations in advanced pancreatic cancer. Journal of Clinical Oncology. 27(15_suppl). e15629–e15629. 2 indexed citations

10.

Niwa, Tetsu, Makoto Ueno, S. Ohkawa, et al.. (2008). Advanced pancreatic cancer: the use of the apparent diffusion coefficient to predict response to chemotherapy. British Journal of Radiology. 82(973). 28–34. 68 indexed citations

11.

Ueno, Makoto, Tetsu Niwa, S. Ohkawa, et al.. (2005). The prognostic value of perfusion-weighted magnetic resonance imaging in advanced pancreas carcinoma. Journal of Clinical Oncology. 23(16_suppl). 4109–4109. 1 indexed citations

12.

Ohkawa, S.. (2004). Randomized controlled trial of gemcitabine in combination with UFT versus gemcitabine alone in patients with advanced pancreatic cancer. Journal of Clinical Oncology. 22(14_suppl). 4131–4131. 14 indexed citations

13.

Yoneda, Yukihiro, Mitsuaki Tabuchi, Yukio Ohsumi, et al.. (2000). Pre- and in-hospital emergency systems for acute ischemic stroke in a japanese regional hospital. 9(2). 297–298. 1 indexed citations

14.

Tanimoto, Akihiro, et al.. (1994). Time course of the liver enhancement by a novel MR contrast agent 'AMI- 25'. 22(1). 713–724. 1 indexed citations

15.

Ito, Yoshihiko, Kazuo Tarao, Setsuo Tamai, et al.. (1994). Portal vein aneurysm in the liver associated with multiple vascular malformations. Journal of Gastroenterology. 29(6). 776–781. 10 indexed citations

16.

Ohkawa, S., Mitsuaki Tabuchi, & Etsuro Mori. (1993). [Classification of lacunar stroke--subtypes and lesions].. PubMed. 51 Suppl. 654–64.

17.

Ohkawa, S. & Atsushi Yamadori. (1993). CT in hanging. Neuroradiology. 35(8). 591–591. 11 indexed citations

18.

Ohkawa, S., Etsuro Mori, Yukio Ohsumi, Mitsuaki Tabuchi, & Atsushi Yamadori. (1992). [A case of acute multiple sclerosis mimicking tumor on the neuro-imaging studies].. PubMed. 32(11). 1277–80. 1 indexed citations

19.

Ohkawa, S. & Atsushi Yamadori. (1990). [Right-left dissociation of voluntary eyelid closure following right middle cerebral artery infarction].. PubMed. 30(3). 294–8. 1 indexed citations

20.

Ohkawa, S., Atsushi Yamadori, Etsuro Mori, et al.. (1989). A case of primary malignant lymphoma of the brain with high uptake of 123I-IMP. Neuroradiology. 31(3). 270–272. 12 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.

Explore authors with similar magnitude of impact