Toshiya Okajima

755 total citations
56 papers, 585 citations indexed

About

Toshiya Okajima is a scholar working on Organic Chemistry, Pulmonary and Respiratory Medicine and Surgery. According to data from OpenAlex, Toshiya Okajima has authored 56 papers receiving a total of 585 indexed citations (citations by other indexed papers that have themselves been cited), including 27 papers in Organic Chemistry, 15 papers in Pulmonary and Respiratory Medicine and 10 papers in Surgery. Recurrent topics in Toshiya Okajima's work include Aortic Disease and Treatment Approaches (8 papers), Aortic aneurysm repair treatments (7 papers) and Synthesis and Properties of Aromatic Compounds (6 papers). Toshiya Okajima is often cited by papers focused on Aortic Disease and Treatment Approaches (8 papers), Aortic aneurysm repair treatments (7 papers) and Synthesis and Properties of Aromatic Compounds (6 papers). Toshiya Okajima collaborates with scholars based in Japan and Germany. Toshiya Okajima's co-authors include Yoshimasa Fukazawa, Yoshinao Tamaru, Masanari Kimura, Yoshikazu Horino, Kimiaki Imafuku, Zhen‐He Wang, Tsuyoshi Yoshimuta, Koichi Akutsu, Shuji Tanaka and Hitoshi Ogino and has published in prestigious journals such as Journal of the American Chemical Society, Angewandte Chemie International Edition and Circulation.

In The Last Decade

Toshiya Okajima

54 papers receiving 563 citations

Peers

Toshiya Okajima

PRM

GENET

CCM

Lajos Kovács Hungary

Samantha Wrigley United Kingdom

Ryoichi Ando Japan

Trevor S. Abram United Kingdom

Martin Wenzel Germany

Nikhil J. Parekh United States

Rebecca R. Hung United States

Donald B. Miller United States

Shuichi Mori Japan

Eduardo Pérez Spain

Lajos Kovács Hungary

Toshiya Okajima

197 ×0.7

45 ×0.3

PRM

21 ×0.3

GENET

11 ×0.1

CCM

275 ×3.7

Citations per year, relative to Toshiya Okajima Toshiya Okajima (= 1×) peers Lajos Kovács

Countries citing papers authored by Toshiya Okajima

Since Specialization

Citations

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

Fields of papers citing papers by Toshiya Okajima

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Toshiya Okajima

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

Okajima, Toshiya, et al.. (2025). Transfer-printed nanophotonic waveguide on an erbium doped crystal towards hybrid photonic quantum devices. Japanese Journal of Applied Physics. 64(3). 32001–32001.

Yoshimuta, Tsuyoshi, et al.. (2017). Corkscrew sign in Buerger’s disease. Choonpa Igaku. 44(2). 149–151. 1 indexed citations

Yoshimuta, Tsuyoshi, Hiroyuki Yokoyama, Toshiya Okajima, et al.. (2015). Impact of Elevated D-Dimer on Diagnosis of Acute Aortic Dissection With Isolated Neurological Symptoms in Ischemic Stroke. Circulation Journal. 79(8). 1841–1845. 20 indexed citations

Yoshimuta, Tsuyoshi, Toshiya Okajima, Koichiro Harada, et al.. (2012). Impact of the right parasternal view with supine positioning for echocardiographic visualization of acute type A aortic dissection. Journal of Echocardiography. 10(1). 38–39. 1 indexed citations

Yamashita, Daisuke, Kyoichi Wada, Hiroshi Okada, et al.. (2010). Drug Interaction between Voriconazole and Rifampicin after Discontinuation of Rifampicin: A Case Report. Iryo Yakugaku (Japanese Journal of Pharmaceutical Health Care and Sciences). 36(5). 323–327. 1 indexed citations

Akutsu, Koichi, Hiroko Morisaki, Satoshi Takeshita, et al.. (2009). Characteristics in Phenotypic Manifestations of Genetically Proved Marfan Syndrome in a Japanese Population. The American Journal of Cardiology. 103(8). 1146–1148. 19 indexed citations

Yoshimuta, Tsuyoshi, et al.. (2009). Corkscrew collaterals in Buerger’s disease. Canadian Journal of Cardiology. 25(6). 365–365. 9 indexed citations

Sakamoto, Shingo, Naoyuki Yokoyama, Yuiichi Tamori, et al.. (2009). Serial assessment at computed tomography and fluorine-18-labelled deoxyglucose positron emission tomography for the diagnosis and treatment of nonaneurysmal infective aortitis. Canadian Journal of Cardiology. 25(6). 367–367. 2 indexed citations

Okajima, Toshiya, Tadashi Wada, Koichi Akutsu, et al.. (2008). Giant aortic root aneurysm after aortic valve replacement. Canadian Journal of Cardiology. 24(12). S109–S109. 1 indexed citations

10.

Azuma, Takeshi, et al.. (2004). Evaluation of treatment for gastro‐oesophageal reflux disease with a proton pump inhibitor, and relationship between gastro‐oesophageal reflux disease and Helicobacter pylori infection in Japan. Alimentary Pharmacology & Therapeutics. 20(s1). 102–106. 8 indexed citations

11.

Okajima, Toshiya, Kenji Ueshima, Osamu Nishiyama, et al.. (2004). A Case of Recurrent Breast Cancer Detected by Tc-99m Tetrofosmin Myocardial Scintigraphy. Clinical Nuclear Medicine. 29(9). 597–597. 1 indexed citations

12.

Ueshima, Kenji, et al.. (2003). Paradoxical regional myocardial uptake between 201Thallium and 123I-BMIPP SPECT in patients with cardiomyopathy. Heart and Vessels. 18(1). 55–56. 2 indexed citations

13.

Horino, Yoshikazu, Masanari Kimura, Shuji Tanaka, Toshiya Okajima, & Yoshinao Tamaru. (2003). Preparation, Structure, and Unique Thermal [2+2], [4+2], and [3+2] Cycloaddition Reactions of 4Vinylideneoxazolidin‐2‐one. Chemistry - A European Journal. 9(11). 2419–2438. 49 indexed citations

14.

Ueshima, Kenji, et al.. (2002). The incidence of discrepant regional myocardial uptake between 201 thallium and 123 I-BMIPP SPECT in patients with coronary heart disease. International journal of cardiac imaging. 18(4). 273–278. 7 indexed citations

15.

Horino, Yoshikazu, et al.. (1999). Neuartige 1,3-Sulfonyl-Verschiebung bei der Addition von Enolethern an Allenylsulfonamide – ein effizienter Zugang zu Tetrahydropyridinen. Angewandte Chemie. 111(1-2). 123–126. 12 indexed citations

16.

Okajima, Toshiya. (1998). Transition Structures of Schenck Reaction. On the Substituent Effect.. NIPPON KAGAKU KAISHI. 107–112. 2 indexed citations

17.

Usui, Shuji, et al.. (1998). Conformational analysis of dioxa[2.2]orthocyclophanes. Tetrahedron. 54(44). 13495–13504. 12 indexed citations

18.

Okajima, Toshiya, Zhen‐He Wang, & Yoshimasa Fukazawa. (1989). Structures of 2,11-dithia[3.3]orthocyclophane and its diselena analogue. Tetrahedron Letters. 30(12). 1551–1554. 30 indexed citations

19.

Imamura, Akira, Toshiya Okajima, & Katsuya Kanda. (1986). A Molecular Orbital Approach to the Effect of Acid and Base on Mutarotation of d-Glucose. Bulletin of the Chemical Society of Japan. 59(3). 943–945. 5 indexed citations

20.

Imanishi, Ken’ichi, et al.. (1976). [Juvenile hepatocerebral disease with citrullinemia].. PubMed. 16(5). 389–97. 2 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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