| 1918 |
Established Imura Sho-kai. Began manufacturing and selling shipping labels. |
| 1918-07 |
Founded: July 1918. |
| 1937 |
Started manufacturing and selling envelopes. |
| 1950 |
Reorganized into Imura Shipping Label Envelope Co., Ltd., and established Osaka branch office. |
| 1950-02 |
Established: February 1950. |
| 1957 |
Developed rotary envelope bag-making machine. |
| 1957 |
Founded the Sōhaku-kai in 1957. |
| 1957 |
Celebrated its 100th anniversary. |
| 1958 |
Established Tokyo branch office. |
| 1960 |
Developed plastic window envelope processing machine. |
| 1961 |
Developed rotary bag-making machine directly coupled with flexographic printing machine. |
| 1962 |
Renamed to Imura Co., Ltd. Envelopes, started operation of Sagamihara factory, developed rotary tack bag-making machine, and developed rotary precious goods bag-making machine. |
| 1967 |
Received JIS approval. Introduced foreign-made advanced bag-making machine. |
| 1968 |
Introduced cellophane window envelope processing machine. |
| 1974 |
Started operation of Totsuka factory. |
| 1977 |
Released side-seam envelopes. |
| 1979 |
Developed and released Memo-Loader. |
| 1980 |
Established Mailing Service Division. |
| 1982 |
Started operation of Goshō factory. |
| 1985 |
Established the Information Systems Division and commenced operations at the Tsukuba factory. |
| 1989 |
Commenced operations at the Hiranoya office (now Kansai Mailing Center). |
| 1990 |
Moved the headquarters structure to Osaka. |
| 1995 |
Joined the Envelope Manufacturers Association (EMA) as an international member. |
| 1999 |
Published the 80th anniversary book of Imura Envelopes and obtained ISO14001 certification at the Nara Shinjo and Gisho factories. |
| 2000 |
Listed on the second sections of the Tokyo and Osaka Stock Exchanges, acquired Higashi An Printing Co., Ltd. as a subsidiary, and commenced operations at the Akishima office. |
| 2001 |
Obtained ISO9002 (now ISO9001) certification at the Tsukuba factory. |
| 2002 |
Obtained ISO9001 certification at the Nara Shinjo factory. |
| 2003 |
Obtained ISO9001 certification and Privacy Mark certification at the Sagamihara factory. |
| 2004 |
Obtained ISO14001 certification company-wide. |
| 2005 |
Obtained ISMS (now ISO/IEC27001) certification at the Akishima and Hiranoya offices, obtained ISO9001 certification at all envelope factories, and established Tsuda Imura Co., Ltd. (subsidiary). |
| 2008 |
Obtained ISO9001 certification at the Akishima office. |
| 2011 |
Absorbed and merged Tsuda Imura Co., Ltd. and established a Nagoya branch office. |
| 2012 |
Obtained ISO/IEC27001 certification for the Information Systems Division i-Cloud Team (customer server operations). |
| 2016 |
Absorbed and merged Taipack Co., Ltd. (subsidiary). |
| 2017 |
Moved the Tokyo office. |
| 2018 |
Renamed the Tokyo office to Tokyo headquarters and established a dual-headquarters system with Osaka headquarters. |
| 2019 |
Moved the Osaka headquarters (main office). |
| 2022 |
Made Hashimoto Corporation (now Imura Printing Co., Ltd.) a subsidiary, opened the training facility 'Junso-kan' at 777 Jiriguchi, Katsuragi City, Nara Prefecture, and moved to the Tokyo Stock Exchange Standard Market following market restructuring. |
| 2023 |
Changed the company name to Imura Co., Ltd. and acquired Logitech Co., Ltd. as a subsidiary. |
| 2024 |
SONGLAM TRADING AND PACKAGING PRODUCTION JOINT STOCK COMPANY was made a subsidiary. |
| 2026 |
Nara Shinjo Plant: Second factory began operations. |
