Saitama City Foundation for Business Creation
RIKEN
Nippon Tokushukan MFG. Co. Ltd.
NIPPON PISTON RING CO., LTD
Nihon Chushashin Kogyo Co., Ltd.

Saraya Co., Ltd.
SAWANE SPRING CO., LTD.
SEIRIN CORPORATION
SEIWA KASEI, INC.
Sekisui Plastics Co., Ltd.