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| 2025/10/29 | Notice of Price Revision |
| 2023/11/27 | Notice of Price Revision |
| 2022/10/25 | Notice of Price Revision |
| 2020/10/02 | Notice of Price Revision |
| 2020/06/15 | ISO for Oken type Smoothness Tester published. |
| 2018/09/26 | Notice of Price Revision |
| 2015/05/18 | ISO for Oken type Air-permeability Tester published. |
| 2015/04/16 | Notice of Price Revision |
| 2015/01/15 | Technical paper added. |
| 2015/01/01 | Happy new year! |
| 2014/12/19 | Website renewal. |