ワイエイシイマシナリー株式会社

Y.A.C. Co., Ltd. was established at Akishima, Tokyo with a capital of 2.1 million yen.

Penetrated into industrial package business and started to sell packaging equipment to food industry and cleaning industry.

企業の本社が東京都立川市に移転

Builds Akishima factory at Akishima-Shi, Tokyo.

Penetrated into semiconductor business.

Built a headquarter factory at Akishima.

Developed and started to sell POS system for liquor store

Started magnetic memory disk business.

企業の本社工場の床面を拡張

Opens California Representative Office at Santa Clara, California

東京都昭島市に技術センターを建設

Started to traded on counter of Japan Securities Dealers Association (present “JQ”)

Established YAC Systems Singapore Pte. Ltd. at Singapore with a capital of S$300 thousand.

Builds the 2nd Akishima Factory

Merged with Plasma System co., Ltd.

Purchases industrial laundry equipment business from Fuji car Mfg group

Acquires and consolidates Yoshimura Machinery Co., Ltd and changes the corporate name to YAC Niigata Machinery Co., Ltd.

Listed on TSE2.

Listed on TSE1

Purchases Photo Voltaic business from S.E.S. Co., Ltd.

Establishes subsidiary in Korea.

Established YAC (Shanghai) International Trade Co., Ltd. in Shanghai, P.R.C. .

Acquired and consolidated Denko Co., Ltd. and changed name into YAC Denko Co., Ltd.

DENKO Co., Ltd. changes corporate name to YAC DENKO Co., Ltd.

Acquired and consolidated Kokusai Dennetsu Co., Ltd and changed name into YAC Kokusai Dennetsu Co., Ltd.

Acquired and consolidated Ohkura Electric Co., Ltd.

Established YAC Dastech Co., Ltd.

Acquired and consolidated Pheton Co., Ltd. and changed name into YAC Pheton Co., Ltd.

Established Shaoxing Weiaixin Electronic Equipment Co.,Ltd.

Acquired and consolidated Nihon Garter Co., Ltd.

Established T.Y.A.C.CORP.

Merged with YAC Phoeton Co., Ltd.

Acquired and consolidated Miyuki Elecs Co., Ltd.

Acquired ion beam application equipment manufacturing business from Hitachi Ibaraki Technical Service Ltd.

Transition to holding company system and changed name to Y.A.C. HOLDINGS CO., LTD.

Built Fuji factory at Minamitsuru-Gun, Yamanashi.

Started Business Unit system by dividing 13 consolidated companies into 4 business field.

Acquired shares of Daiichi Co., Ltd. (Sayama, Saitama) and made it a consolidated subsidiary.

YAC Garter Co., Ltd. (surviving company) merged with Daiichi Co., Ltd. (disappearing company).

Terminated business unit system.

YAC Denko Co,.Ltd. (surviving company) and YAC Kokusai Dennetsu Co.,Ltd. (disappearing company) merged.

Moved from the First Section of the Tokyo Stock Exchange to the Prime Market

ワイエイシイマシナリー株式会社（存続会社）とワイエイシイ新潟精機株式会社（消滅会社）を合併

Y.A.C. Machinery Co., Ltd. (surviving company) and YAC Niigata Machinery Co., Ltd. (diappearing company) merged.

YAC Denko Co.,Ltd. (surviving company) and Y.A.C. Technology Co.,Ltd.(disappearing company) merged.

Acquired shares of JE International Corporation and GD tech Co., Ltd. and made them consolidated subsidiaries.

Concluded an agreement on capital alliance with Linus Biotechnology Inc.

Ohkura Electric Co., Ltd. acquires all shares of Hosyo-Sangyo Inc. and makes it a consolidated subsidiary.

YAC BIO Inc. is established and becomes a wholly owned subsidiary.

Partial acquisition of TT Holdings, Inc. shares, which owns 100% of the shares of Topcon Technohouse Corporation, to make it a consolidated subsidiary.

Topcon Technohouse Corporation changed its name to TechnoOptis Co., Ltd.

Acquired additional shares of TT Holdings, Inc., which owns 100% of the shares of TechnoOptis Co., Ltd. to make it a wholly owned subsidiary.

TechnoOptis Co., Ltd. (surviving company) and TT Holdings, Inc.(disappearing company) merged.

Acquisition of Sanwa Electric Instrument Co., Ltd. and Sanwa Tesmex Co., Ltd. as Subsidiaries.