Sanyu Engineering Co., Ltd. is a company that proposes and supports the optimum communication environment for companies. 026-227-0083 926 Kurita, Nagano City, Nagano Prefecture 380-0921 Sanyu Engineering Co., Ltd. is a company that proposes and supports the optimum communication environment for companies. TOPICS Do you have any problems such as "The phone has broken down!" Or "Where should I contact you !!"　　　　　　? In such a case , please contact Sanyu Engineering ! We will respond promptly to customers in Nagano prefecture. We also handle " maintenance contracts " for business phones and home telephones . NEWS What's February 6, 2016 NTT home telephone "α B1" has been uploaded. NEW January 25, 2016 NTT Business Phone "α A1" has been uploaded. NEW January 20, 2016 "My number measures" has been updated. Top page Company policy Company profile Product / Service List Maintenance contract / campaign Sanyu Engineering Co., Ltd. 926 Kurita, Nagano City, Nagano Prefecture 380-0921 TEL 026-227-0083 FAX 026-228-5799 Inquiries copyright © 2015 Sanyu-Engineering all rights reserved. privacy policy Description of Specified Commercial Transactions Law