| Date | Description |
|---|---|
| 2018-06-17 | delete president Yutaka Kubota |
| 2018-06-17 | insert president Ryoji Kudo |
| 2018-06-17 | delete person Yutaka Kubota |
| 2018-06-17 | insert person Ryoji Kudo |
| 2015-11-02 | delete president Takeo Kurematsu |
| 2015-11-02 | insert president Yutaka Kubota |
| 2015-11-02 | delete person Takeo Kurematsu |
| 2015-11-02 | insert person Yutaka Kubota |