Dai-ichi Seiko Co.,Ltd. was established for the purpose of specialized production of high precision molds and dies by means of modular mold-making method whereby the molds are fabricated with insert partition using hardened material through precision machining progress.

I-PEX (Thailand) Co., Ltd (formerly Thai Dai-ichi Seiko Co., Ltd) was established on June 2000 in Chonburi, Thailand. It is a subsidiary of Dai-ichi Seiko Co., Ltd., Japan. It's main business includes the Development and Manufacturing of electrical & electronics components.