| 1971-06 |
Since its founding, it has established offices nationwide and continues to grow with its group companies. |
| 1971-06-28 |
Founded on June 29, 1971, in Kita-ku, Nagoya City, as Kato Special Paper Co., Ltd. |
| 1971-06-28 |
Our company, founded as Kato Special Paper Co., Ltd., has reached its 55th anniversary. |
| 1979-08 |
Moved its headquarters to Izumi 2-chome, Higashi-ku, Nagoya City. |
| 1979-08 |
Moved headquarters to 3-3-3 Izumi 2-chome, Higashi-ku, Nagoya. |
| 1985-05 |
Constructed an Ink Ribbon recycling plant in Kasugai City, Aichi Prefecture. |
| 1985-05 |
Constructed the Ink Ribbon Recycling Plant in Kasugai City, Aichi Prefecture. |
| 1988-11 |
Opened the Kasugai Distribution Center in Kasugai City, Aichi Prefecture. |
| 1988-11 |
Opened the Kasugai Distribution Center in Kasugai City, Aichi Prefecture. |
| 1990-06 |
Established IAO Tech Co., Ltd. as a production headquarters. |
| 1990-06 |
Established AO Technology Inc. (now Production Headquarters). |
| 1998-02 |
Acquired shares of IAO Tech Co., Ltd. and made it a 100% subsidiary. |
| 1998-02 |
Acquired shares of AO Technology Inc. and made it a 100% subsidiary. |
| 1998-09 |
Completed the Komagane Factory in Komagane City, Nagano Prefecture. |
| 1998-09 |
Completed construction of the Komagane Factory in Komagane City, Nagano Prefecture. |
| 2002-01 |
The Komagane Factory obtained ISO 14001 certification. |
| 2002-01 |
Komagane Factory obtained ISO 14001 certification. |
| 2002-03 |
The headquarters, Nagoya branch, and Komagane Factory obtained ISO 9001 certification. |
| 2002-03 |
Headquarters, Nagoya Branch, and Komagane Factory obtained ISO 9001 certification. |
| 2002-09 |
Merged with Iatekno Co., Ltd. and changed the company name to KTYK Co., Ltd. |
| 2002-09 |
Merged with AI Techno Inc. and simultaneously changed the company name to KTK Corporation. |
| 2006-04 |
Listed on the JASDAQ Securities Exchange (now the Tokyo Stock Exchange Standard Market). |
| 2006-04 |
Listed on the JASDAQ Stock Exchange (now the Tokyo Stock Exchange Standard Market). |
| 2009-07 |
The Komagane Factory obtained STMC certification. |
| 2009-07 |
Komagane Factory obtained STM C certification (world standard for recycled toner cartridge quality). |
| 2011-12 |
Obtained the E&Q Mark certification based on the Japanese Cartridge Recycling Industry Association's management standards. |
| 2011-12 |
Obtained the E&Q Mark certification (Japanese Cartridge Recycling Industry Association's management standards). |
| 2012-12 |
Acquired shares of Aion Crown Co., Ltd. through a share exchange and made it a 100% subsidiary. |
| 2012-12 |
Acquired shares of Aoyun Crown Co., Ltd. through a share exchange, making it a 100% subsidiary. |
| 2013-06 |
Aion Crown further acquired shares of SBM Solution and made it a 100% subsidiary. |
| 2013-06 |
Aoyun Crown Co., Ltd. further acquired shares of SBM Solution Co., Ltd., making it a 100% subsidiary. |
| 2013-12 |
Acquired SBM Solution shares from Aion Crown and made it a 100% subsidiary. |
| 2013-12 |
SBM Solution Co., Ltd. acquired shares from Aoyun Crown Co., Ltd., becoming a 100% subsidiary. |
| 2014-06 |
Acquired shares of Kitabutsu Chubu Co., Ltd. and made it a 100% subsidiary. |
| 2014-06 |
Acquired shares of Kitabutsu Chubu Co., Ltd., making it a 100% subsidiary. |
| 2016-03 |
Established the Solutions Division as KTK Solutions Inc. and transferred a portion of its shares. |
| 2016-03 |
Split off the Solutions Division as KTK Solutions Co., Ltd., creating a new entity, and transferred part of the shares. |
| 2016-08 |
Merged with AO Technology Inc. |
| 2016-08 |
Merged with Iota Tech Co., Ltd. |
| 2018-02 |
Opened the Komagane Logistics Center in Komagane City, Nagano Prefecture. |
| 2018-02 |
Opened the Komagane Logistics Center in Komagane City, Nagano Prefecture. |
| 2020-03 |
Aoyun Crown Inc. acquired shares of S & S Inc. and made it a 100% subsidiary. |
| 2020-03 |
Aoyun Crown Co., Ltd. acquired shares of S & S Co., Ltd., making it a 100% subsidiary. |
| 2022-03 |
Acquired shares of Ikolis Inc. and made it a 100% subsidiary. |
| 2022-03 |
Acquired shares of Ikolis Co., Ltd., making it a 100% subsidiary. |
| 2022-04 |
Listed on the main market of the Nagoya Stock Exchange. |
| 2022-04 |
Listed on the main market of the Nagoya Stock Exchange. |
| 2024-02 |
SBM Solutions acquired shares of Tokai Sakurai and made it a 100% subsidiary. |
| 2024-02 |
SBM Solution Co., Ltd. acquired shares of Tokai Sakurai Co., Ltd., making it a 100% subsidiary. |
| 2025-07 |
Acquired shares of Jibun Space Inc. and made it a 100% subsidiary. |
| 2025-07 |
Acquired shares of Jibun Space Co., Ltd., making it a 100% subsidiary. |
