| 1977-05 |
Established A&D Corporation for the manufacture and sale of electronic measuring instruments (capital: 42,040 thousand yen), headquartered in Nerima-ku, Tokyo, with a factory in Kōnosu, Saitama Prefecture |
| 1979-05 |
Relocated headquarters to Shibuya-ku, Tokyo |
| 1981-05 |
Relocated factory (current Kōnosu Factory) to Kōnosu, Saitama Prefecture |
| 1982-06 |
Subsidiarized through acquisition of shares of Kenshinkōgyō Co., Ltd. (now A&D Manufacturing) and entered the electronic balance business |
| 1982-08 |
Established A&D ENGINEERING, INC. (current consolidated subsidiary) in the United States, serving as a sales base in North America and Central and South America |
| 1985-06 |
Established Ritra Co., Ltd. (now A&D Manufacturing), a manufacturing plant for load cells and electronic scales |
| 1987-01 |
Signed a sales agreement with Takeda Medical Co., Ltd. and started selling digital blood pressure monitors |
| 1987-12 |
Acquired shares of Mercury Weighing and Control Systems Pty. Ltd. (current consolidated subsidiary A&D AUSTRALASIA Pty Ltd.) in Australia, establishing an Oceania base |
| 1989-05 |
Merged with Takeda Medical Co., Ltd. |
| 1989-08 |
Established a development and technology center in Kōnosu, Saitama Prefecture, transferring R&D functions from Kōnosu Factory |
| 1990-04 |
Established A & D System Co., Ltd., and strengthened medical device development |
| 1990-09 |
Relocated headquarters to Toshima Ward, Tokyo |
| 1990-12 |
Established A&D KOREA Limited (currently a consolidated subsidiary) in South Korea |
| 1991-05 |
Established A&D INSTRUMENTS LTD. (currently a consolidated subsidiary) in the UK, serving as a European base |
| 1993-05 |
Formed a business alliance with Orientec Co., Ltd. (now A&D Manufacturing), acquired sales agency rights for the company, and started selling testing machines and load cells |
| 1994-06 |
Established A&D SCIENTECH TAIWAN LIMITED (currently a consolidated subsidiary) in Taiwan |
| 1995-10 |
Obtained ISO9001 certification |
| 1996-01 |
A&D KOREA Limited (currently a consolidated subsidiary) acquires shares of HANA INSTRUMENTS CO., LTD. (currently a consolidated subsidiary A&D Scales Co., Ltd.) in Korea, making it a subsidiary |
| 1996-09 |
Made Orientec Co., Ltd. (now A&D Manufacturing) a subsidiary by acquiring its shares |
| 2002-10 |
Established Aian De Electronics (Shenzhen) Co., Ltd. (currently a consolidated subsidiary) in China, as a manufacturing plant for health equipment |
| 2003-04 |
Listed on the JASDAQ Market |
| 2003-08 |
Made Ritra Co., Ltd. (now A&D Manufacturing) a wholly owned subsidiary by acquiring its shares |
| 2005-01 |
Merged with A&D System Co., Ltd. |
| 2005-02 |
Listed on the Tokyo Stock Exchange Second Section |
| 2005-04 |
Established A&D Technology Inc. (now A&D ENGINEERING) in the US |
| 2006-03 |
Listed on the Tokyo Stock Exchange First Section |
| 2006-06 |
Made Kensei Industry Co., Ltd. (now A&D Manufacturing) a wholly owned subsidiary by acquiring its shares |
| 2006-08 |
Through A&D Technology Inc., acquired the Powertrain Technology division of US MTS Systems Corporation |
| 2007-10 |
Established Aian De Electronics (Shanghai) Co., Ltd. in China |
| 2008-02 |
Established A&D Instruments India Private Limited (currently a consolidated subsidiary) in India |
| 2008-03 |
Acquisition of shares of Holon Co., Ltd. (now a consolidated subsidiary) to form a group company |
| 2008-08 |
Established A&D Europe GmbH (now a consolidated subsidiary) in Germany |
| 2008-10 |
Acquired shares of Sam Electronics Machinery Co., Ltd. (now A&D Manufacturing) to become a wholly owned subsidiary |
| 2009-01 |
Acquired shares of Best Measuring Instruments Co., Ltd. (now a consolidated subsidiary) to become a wholly owned subsidiary |
| 2013-06 |
Transferred weight checker and metal detection business from Mytech Industries Co., Ltd. |
| 2013-07 |
Established MBS Co., Ltd. in Kitamoto City, Saitama Prefecture, and started automobile design development consulting and commissioned testing and measurement services |
| 2015-02 |
Established A&D Vietnam Limited in Vietnam |
| 2015-07 |
Acquired measurement business from Japan Avionics Co., Ltd. and started sales of industrial measurement equipment (formerly NEC San-ei, NEC San-ei) |
| 2015-12 |
Established A&D Instruments Canada Inc. in Canada |
| 2018-06 |
Made additional acquisition of Holon Co., Ltd. shares to become a consolidated subsidiary |
| 2018-09 |
Established a representative office in Thailand |
| 2020-01 |
Acquired shares of A&D SCIENTECH TAIWAN LIMITED in Taiwan to become a subsidiary |
| 2022-04 |
Transitioned to a holding company through share exchange with Holon Co., Ltd. and absorption-type split with A&D Co., Ltd., and changed the trade name to A&D Holon Holdings |
| 2023-01 |
Three subsidiaries, Kenshinkogyo Co., Ltd., Litra Co., Ltd., and Oritek Co., Ltd., merged, and the trade name was changed to A&D Manufacturing Co., Ltd. |
| 2024-04 |
A&D Manufacturing Co., Ltd., a consolidated subsidiary of A&D Co., Ltd., absorbed and merged Sam Electronics Machinery Co., Ltd. |
| 2025-04 |
A&D Engineering, Inc., a subsidiary, absorbed and merged with A&D Technology, Inc. |
