Siward Technology Co., Ltd. (Yamagata Factory)
3-2-74 Tohrimachi Yonezawa City Yamagata-Pref. 992-0025 Japan
电话: +81-238-24-4318　
传真: +81-238-23-3308
Email: staff1@siward.co.jp 

Siward Technology Co., Ltd.(Tokyo Office)
1-3-8 Asahigaoka Nerima-Ku Tokyo 176-0005 Japan
电话: +81-3-5988-7665
传真: +81-3-5983-0807
Email: staff2@siward.co.jp