| Nov.,1931: |
Founded by Seiichi Aoki, in Shiba, Minato-ku, Tokyo |
| Mar.,1938: |
Unlimited Partnership Aoki Seiichi Shoten established |
| Sep.,1946: |
Changed to Aoki Shoten Co.,Ltd. |
| Oct.,1955: |
Kawasaki Business Office opened |
| Feb.,1961: |
Yokkaichi Business Office opened in Mie Pref. |
| Jul.,1961: |
Kyushu Business Office opened in Saga City, Saga Pref. |
| May.,1969: |
Title changed to Aoki & Co.,Ltd. |
| Jul .,1969: |
Kodaira Branch Office opened at Kodaira City, Tokyo |
| Nov.,1978: |
Licensed for plumbing work by the Ministry of Land, Infrastructure, Transit, and Tourism |
| Jun.,1981: |
Odawara Business Office opened at Minami Ashigara City, Kanagawa Pref. |
| Aug.,1984: |
Representative Office opened in Rotterdam, the Netherlands |
| Nov.,1988: |
Yamagata Factory opened at Nan-yo City, Yamagata Pref. |
| Dec.,1988: |
Kashima Branch Office opened at Kamisu-machi, Kashima-Gun, Ibaraki Pref. |
| Nov.,1994: |
Expanded Second Factory in Yamagata Factory. |
| Jul .,1995: |
Representative Office opened in South Carolina U.S.A |
| Sep.,1997: |
Licensed for machine installation work by the Ministry of Land, Infrastructure, Transit, and Tourism |
| Dec.,2008: |
The U.S.A. Representative Office in South Carolina closedown. |
| May.,2009: |
Head Office production Dept. and Yamagata Factory licensed ｢ISO9001｣. |
| Oct.,2009: |
Rotterdam Representative Office in the Netherlands resistered as a Branch Office. |
| Oct.,2017: |
Odawara Business Office closed and consolidated into Head Office. |
| Dec.,2018: |
Expanded Third Factory in Yamagata Factory. |
| Mar.,2020: |
Kashima Branch Office in Kamisu City, Ibaraki Pref. closedown. |
| Jul.,2020: |
Chubu Business Office Completed new office and relocated. |
| Dec.,2024: |
Expanded Fourth Factory in Yamagata Factory. |
