This map shows the geographic impact of Oka'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 Oka with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Oka more than expected).
This network shows the impact of papers produced by Oka. 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 Oka. The network helps show where Oka may publish in the future.
Co-authorship network of co-authors of Oka
This figure shows the co-authorship network connecting the top 25 collaborators of Oka.
A scholar is included among the top collaborators of Oka 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 Oka. Oka is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
All Works
20 of 20 papers shown
1.
Oka, et al.. (2015). Comparison of Embodied Energy/CO2 of Office Buildings in China and Japan. 土木工程与建筑：英文版. 9(3). 300–307.7 indexed citations
2.
Tanaka, Masatake, et al.. (2013). Endoscopic appearance of AIDS-related gastrointestinal lymphoma with c-MYC rearrangements: Case report and literature review. 世界胃肠病学杂志：英文版（电子版）. 4827–4831.2 indexed citations
Oka, et al.. (2011). Risk Threats in a Creative Funding Scheme for Infrastructure Project in Indonesia： Cileunyi-Sumedang-Dawuan Toll Road Project Case. 土木工程与建筑：英文版. 5(1). 89–96.1 indexed citations
5.
Oka, et al.. (2011). A common mode noise filter for high speed and wide band differential mode signal transmission. International Symposium on Electromagnetic Compatibility. 732–736.2 indexed citations
6.
Kimura, K, et al.. (2010). A COMPARATIVE STUDY OF HUMAN HEALTH RISKS POSED BY A FLAME RETARDED CURTAIN WITH HEXABROMOCYCLODODECANE (HBCD).
Tanaka, Masatake, et al.. (2008). Clinical significance of type VI pit pattern subclassification in determining the depth of invasion of colorectal neoplasms. 世界胃肠病学杂志：英文版（电子版）. 211–217.5 indexed citations
9.
Abé, et al.. (2008). Incidence of reflux esophagitis and Helicobacterpylori infection in diabetic patients. 世界胃肠病学杂志：英文版（电子版）. 14(20). 3212–3217.1 indexed citations
10.
Сузуки, et al.. (2006). Nicotine Treatment Induces Expression of Matrix Metalloproteinases in Human Osteoblastic Saos-2 Cells. 生物化学与生物物理学报：英文版. 38(12). 874–882.24 indexed citations
11.
Sato, Nakajima, Oka, et al.. (2004). High-speed waveguide switches for optical routers and networks. Optical Fiber Communication Conference. 1.2 indexed citations
12.
Tanaka, Masatake, et al.. (2004). Application of morphology for detection of Dots in tumor. Society of Instrument and Control Engineers of Japan. 1. 591–594.1 indexed citations
Suzuki, ※※※※, et al.. (1999). Synthesis and Muscarinic Activity of a Series of Quinolines and Naphthalenes with a 1-Azabicyclo[3.3.0]octane Moiety.. 岐阜藥科大學紀要 = The annual proceedings of Gifu College of Pharmacy. 48. 44.1 indexed citations
Oka, et al.. (1996). Constitutive Activation of Mitogen-activated Protein(MAP) Kinases in Human Renal Cell Carinoma.. 岐阜藥科大學紀要 = The annual proceedings of Gifu College of Pharmacy. 45. 107.2 indexed citations
18.
Oka, et al.. (1996). A preliminary study on the effects of pyroclastic fall deposit on the forest eco-system in southwestern Hokkaido, Japan. 31(31). 149–156.2 indexed citations
19.
Oka, et al.. (1995). Polynomial Normal Form of a Plane Curve with a Given Weight Sequence. 10(4). 53–61.2 indexed citations
20.
Oka, et al.. (1992). Comparison of Aristolochia Species with Chemical Constituents.. 岐阜藥科大學紀要 = The annual proceedings of Gifu College of Pharmacy. 41. 84.1 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.