June 23, 2016 Added the achievements of the construction industry. April 15, 2016 Added the achievements of the construction industry. October 1, 2015 The homepage has been released. Koei Planning Co., Ltd. 3158-10 Higashisakamoto, Iiyama-cho, Marugame-shi, Kagawa 762-0081 TEL: 0877-98-7797 FAX: 0877-98-7797 © koeikikaku All rights reserved. home Company Profile Business content Employment information Notice Contact Us