A company that does not give up until it succeeds, continues to hone and pursue itself, and opens up the future We have more than 300 cases since our establishment, such as retail stores, restaurants, medical facilities, etc. A track record of utilizing the strength of consistently designing, designing, and constructing. 2017.04.01 Notice of trade name change and office relocation 2016.05.10 Past construction results have been added. Top Company Profile Past performance Employment information Contact Us site map News topics Privacy policy Irotasu Co., Ltd. 1st floor, Hayakawa Building, 3-7-13 Iwamotocho, Chiyoda-ku, Tokyo 101-0032 TEL 03-5839-2161 / FAX 03-5839-2162 Copyright 2014 IROTAS Inc., All Rights Reserved.