Sangaku Journal of Mathematics Published by the VUZF University of Finance, Business and Entrepreneurship, Sofia, Bulgaria About this Journal   |   Editorial Board  |   Instructions for Authors   |   Review Process   |   Links ISSN 2534-9562 Editors-in Chief: Hiroshi Okumura, Professor, Ph.D. Maebashi Gunma, 371-0123, Japan e-mail: okmr@protonmail.com Sava Grozdev, Professor, DSc, VUZF University of Finance, Business and Entrepreneurship, Sofia, Bulgaria e-mail: sava.grozdev@gmail.com Volume 1 (2017) Hiroshi Okumura, Japanese mathematics, pp.1-6. The paper is reprinted from "Symmetry: Culture and Science",Volume 12 (1-2) 79-86 (2001) with permission from the publisher. Problems 2017-1, pp.7-10. Problems 2017-2, pp.11-12. Francisco Javier García Capitán, Solution to 2017-1 Problem 1, pp.13-15. Yasuo Kanai and Hiroshi Okumura, A three tangent congruent circle problem, pp.16-20. Supplementary material: animation.gif