| August 1952 |
Started a steel coil slitting in Sumida Ward |
| June 1954 |
Renamed as Tokiwa Koutai Co.,Ltd. and move to Kameido, Koto Ward |
| April 1969 |
Established head office factory |
| May 1983 |
Ibaraki factory's construction completed |
| April 2000 |
Ibaraki warehouse's construction completed, started storage and distribution task |
| March 2015 |
The second warehouse of Ibaraki factory was registered as a business warehouse |
| November 2015 |
Registered Tokiwa Slitter Co., Ltd. as a cooperate in Samut Prakan province of Thailand and started a factory construction |
| Feburuary 2016 |
Ibaraki second warehouse's construction completed, started a storage and distribution task |
| August 2017 |
Tokiwa Slitter Co., Ltd. started to operate |
| March 2019 |
TOKIWA SLITTER CO.,LTD. new running saw |
| December 2020 |
Transition from OHSAS 180001 to ISO 45001 |
| March 2021 |
Core system NewTops updated |
| October 2021 |
Head office factory | Single-blade grinding equipment newly installed |
| January 2022 |
Ibaraki factory | PS1 (Precision Slitter) is newly established and begins operation. |
| April 2022 |
Head office factory | Ibaraki factory | Updated packaging assistance robot |
| May 2022 |
Head office factory | NO.5 Newly installed front and back surface inspection equipment |
| July 2022 |
Head office factory | Ibaraki factory | Newly installed polishing equipment with NC |
| August 2022 |
Ibaraki factory | NO.3 Newly installed front and back surface inspection equipment |
| October 2022 |
Ibaraki factory | NO.7 Temporary assembly arbor newly installed |
| November 2022 |
Head office factory | NO.2 Newly installed front and back surface inspection equipment |
| December 2022 |
Ibaraki factory | NO.7 Newly installed front and back surface inspection equipment |
| March 2023 |
Ibaraki factory | NO.6 Newly installed front and back surface inspection equipment |
| September 2023 |
Major revision of core system |
