| Oct 1, 2008 | Telepark Corp. was merged on equal terms with MS Communications Co, Ltd. to form T-Gaia Corporation |
|---|---|
| January 2009 | T-Gaia Corporation relocated its head office to Ebisu, Shibuya-ku, Tokyo |
| June 2011 | Started the Card Mall Business utilizing Gift Card |
| November 2012 | Started deployment of Smart Labo, specialty shops for smartphone accessories and peripheral equipment |
| November 2013 | Established T-GAIA Asia Pacific Pte. Ltd. as a subsidiary, in Singapore |
| March 2014 | WAMNET Japan K.K. acquired as a consolidated subsidiary |
| March 2019 | PC Technology, Inc. acquired (acquired as a consolidated subsidiary in April 2023) |
| July 2019 | TG Solutions Corporation acquired (acquired as a consolidated subsidiary in April 2022) |
| March 2020 | TG Power Inc. acquired as a consolidated subsidiary |
| Infinity Communication Co., Ltd. (currently: InfiniCore Co., Ltd.) acquired (acquired as a consolidated subsidiary in April 2023) | |
| November 2020 | TF Mobile Solutions Corporation acquired as a consolidated subsidiary (Absorbed through an absorption-type merger in February 2021) |
| April 2021 | TG Farm, Inc., an agricultural subsidiary, established |
| September 2022 | UNiCASE Co., Ltd. acquired as a consolidated subsidiary (Absorbed through an absorption-type merger in July 2025) |
| December 2022 | MOBILETRUST Co., Ltd. acquired as a consolidated subsidiary (Absorbed through an absorption-type merger in April 2024) |
| March 2025 | Delisted from the Tokyo Stock Exchange Prime Market |
