| 1946-11 |
November 1946: Establishment of Akatsuki Construction Industry Co., Ltd. |
| 1946-11 |
Establishment of Akatsuki Construction Industry Co., Ltd. |
| 1953-09 |
September 1953: Establishment of Iijima Shokai Co., Ltd. |
| 1953-09 |
Establishment of Iijima Shokai Co., Ltd. |
| 1953-09-16 |
Established on September 16, Showa 28 (1953). |
| 1953-09-16 |
Established: September 16, 1953 |
| 1965-06 |
June 1965: Changed company name to Iijima Equipment Industry Co., Ltd. |
| 1965-06 |
Changed company name to Iijima Equipment Industry Co., Ltd. |
| 1977-10 |
October 1977: Opened Tokyo Branch |
| 1977-10 |
Opened Tokyo Branch |
| 1985-11 |
November 1985: Changed company name to Iijima Industry Co., Ltd. |
| 1985-11 |
Changed trade name to Iijima Industries Co., Ltd. |
| 1988-05 |
May 1988: Established First-Class Architect Office Registered by Ibaraki Prefecture Governor (Closed in November 2015) |
| 1988-05 |
Ibaraki Prefecture Governor Registration First-Class Architect Office Established (November 2015 Closed) |
| 1990-12 |
December 1990: Opened Tsukuba Branch |
| 1990-12 |
Established Tsukuba Branch |
| 1994-04 |
April 1994: Listed on JASDAQ (now Tokyo Stock Exchange Standard Market) (Stock Code 1997) |
| 1994-04 |
Listed on JASDAQ (currently Tokyo Stock Exchange Standard Market) (Stock code 1997) |
| 2001-09 |
September 2001: Changed company name to Akatsuki Iijima Industries Co., Ltd. (Merged with Akatsuki Construction Industry Co., Ltd.) |
| 2001-09 |
Changed trade name to Akatsuki Iijima Industries Co., Ltd. (Merged with Akatsuki Construction Industries Co., Ltd.) |
| 2025-12-24 |
Obtained permit on December 24, Reiwa 7 (2025). |
| 2025-12-24 |
Permit date: December 24, 2025 Permit industry: Plumbing work, Civil engineering work, Construction work, Paving work, Waterworks facility work |
| 2025-12-24 |
Permit date: December 24, 2025 Permit industry: Electrical work, Machinery and equipment installation work, Fire protection facility work |
