Toshio Okano

6.1k total citations
200 papers, 4.9k citations indexed

About

Toshio Okano is a scholar working on Pathology and Forensic Medicine, Nutrition and Dietetics and Endocrinology, Diabetes and Metabolism. According to data from OpenAlex, Toshio Okano has authored 200 papers receiving a total of 4.9k indexed citations (citations by other indexed papers that have themselves been cited), including 101 papers in Pathology and Forensic Medicine, 63 papers in Nutrition and Dietetics and 44 papers in Endocrinology, Diabetes and Metabolism. Recurrent topics in Toshio Okano's work include Vitamin D Research Studies (99 papers), Vitamin K Research Studies (48 papers) and Vitamin C and Antioxidants Research (45 papers). Toshio Okano is often cited by papers focused on Vitamin D Research Studies (99 papers), Vitamin K Research Studies (48 papers) and Vitamin C and Antioxidants Research (45 papers). Toshio Okano collaborates with scholars based in Japan, United States and Netherlands. Toshio Okano's co-authors include Naoko Tsugawa, Yoshitomo Suhara, Maya Kamao, Kimie Nakagawa, Tadashi Kobayashi, Atsuko Takeuchi, Natsumi Sawada, Noboru Kubodera, Yoshihisa Hirota and Yuka Shimomura and has published in prestigious journals such as Nature, Journal of Biological Chemistry and Blood.

In The Last Decade

Toshio Okano

193 papers receiving 4.7k citations

Peers

Toshio Okano
Katsumi Ikeda Japan
Jan I. Pedersen Norway
Paolo Fanti United States
Edilia Tapia Mexico
Jingbo Pi China
Aruna Kode United States
Denis M. Medeiros United States
Jaffar Nourooz‐Zadeh United Kingdom
T.L. Dormandy United Kingdom
Belma Turan Türkiye
Katsumi Ikeda Japan
Toshio Okano
Citations per year, relative to Toshio Okano Toshio Okano (= 1×) peers Katsumi Ikeda

Countries citing papers authored by Toshio Okano

Since Specialization
Citations

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

Fields of papers citing papers by Toshio Okano

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Toshio Okano

This figure shows the co-authorship network connecting the top 25 collaborators of Toshio Okano. A scholar is included among the top collaborators of Toshio Okano 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 Toshio Okano. Toshio Okano 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.
Nishikawa, Miyu, Kaori Yasuda, Keisuke Abé, et al.. (2018). Generation of 1,25-dihydroxyvitamin D3 in Cyp27b1 knockout mice by treatment with 25-hydroxyvitamin D3 rescued their rachitic phenotypes. The Journal of Steroid Biochemistry and Molecular Biology. 185. 71–79. 19 indexed citations
2.
Okano, Toshio. (2017). A new paradigm of vitamin K action. Japanese Journal of Thrombosis and Hemostasis. 28(3). 353–368.
3.
4.
Okano, Toshio. (2014). [Gla-containing proteins].. PubMed. 24(2). 241–8. 1 indexed citations
5.
Tsugawa, Naoko, Natsumi Sawada, Tomoko Fujita, et al.. (2014). Development of Assay Method for Plasma Concentration of Undercarboxylated Matrix Gla Protein (ucMGP), and Its Usefulness in Estimation of Vascular Vitamin K Status. 88(3). 139–144. 1 indexed citations
6.
Azuma, Kotaro, Tohru Tsukui, Kazuhiro Ikeda, et al.. (2014). Liver-Specific γ-Glutamyl Carboxylase-Deficient Mice Display Bleeding Diathesis and Short Life Span. PLoS ONE. 9(2). e88643–e88643. 10 indexed citations
7.
Okano, Toshio. (2013). [Clinical application of serum 25OHD].. PubMed. 23(3). 377–84. 1 indexed citations
8.
Tsugawa, Naoko & Toshio Okano. (2010). [Vitamin K and fracture].. PubMed. 20(9). 1334–40. 1 indexed citations
9.
Suhara, Yoshitomo, Yoshihisa Hirota, Kimie Nakagawa, et al.. (2007). Design and synthesis of biologically active analogues of vitamin K2: Evaluation of their biological activities with cultured human cell lines. Bioorganic & Medicinal Chemistry. 16(6). 3108–3117. 13 indexed citations
10.
Okano, Toshio, Yuka Shimomura, Makiko Yamane, et al.. (2007). Conversion of Phylloquinone (Vitamin K1) into Menaquinone-4 (Vitamin K2) in Mice. Journal of Biological Chemistry. 283(17). 11270–11279. 205 indexed citations
11.
Kamao, Maya, Natsumi Sawada, Toshiyuki Sakaki, et al.. (2004). Cell specificity and properties of the C-3 epimerization of Vitamin D3 metabolites. The Journal of Steroid Biochemistry and Molecular Biology. 89-90(1-5). 39–42. 29 indexed citations
12.
13.
Fujishima, Toshie, et al.. (2000). Efficient synthesis and biological evaluation of all a-ring diastereomers of 1α,25-dihydroxyvitamin D3 and its 20-epimer. Bioorganic & Medicinal Chemistry. 8(1). 123–134. 53 indexed citations
14.
Tsugawa, Naoko, et al.. (1995). Bioavailability of Calcium from Calcium Carbonate, dl-Calcium Lactate, l-Calcium Lactate and Powdered Oyster Shell Calcium in Vitamin D-Deficient or -Replete Rats.. Biological and Pharmaceutical Bulletin. 18(5). 677–682. 21 indexed citations
15.
Okano, Toshio. (1992). Possible Roles of Vitamin D-Transport Proteins in The Expression of Biological Activities of Vitamin D. 66(2). 65–78. 1 indexed citations
16.
Okano, Toshio, et al.. (1991). Bioavailability of Bovine Bone Powder as a Dietary Calcium Source in Vitamin D-Deficient Rats. 65(7). 323–332. 1 indexed citations
17.
Masuda, Sonoko, et al.. (1989). Plasma Levels of Vitamin D Metabolites of Healthy Subjects in Akita, Japan. 63(7). 311–319. 1 indexed citations
18.
Takeuchi, Atsuko, Toshio Okano, Naoko Tsugawa, et al.. (1989). Effects of Ergocalciferol Supplementation on the Concentration of Vitamin D and Its Metabolites in Human Milk. Journal of Nutrition. 119(11). 1639–1646. 42 indexed citations
19.
Okano, Toshio, et al.. (1989). Protein-binding properties of 22-oxa-1.ALPHA.,25-dihydroxyvitamin D3, a synthetic analogue of 1.ALPHA.,25-dyhydroxyvitamin D3.. Journal of Nutritional Science and Vitaminology. 35(5). 529–533. 60 indexed citations
20.
Okano, Toshio, et al.. (1986). DETERMINATION OF VITAMIN D AND ITS METABOLITES IN BREAST AND COW'S MILK. Journal of Pharmacobio-Dynamics. 9(7). 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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