| Created |
| Associated with 検定教科書体 |
| Associated with 現代日本の紀年法 |
| Associated with 西暦併用を求める会 |
| Associated with 元号さよなら声明 |
| Associated with 公文書の年表記に関する規則 |
| Associated with 平成31年問題 |
| Associated with 元号廃止 |
| Associated with 元号排斥 |
| Associated with 西暦表記を求める会 |
| Associated with 元号廃止論 |
| Associated with 元号はいらない署名運動 |
| Disassociated from 検定教科書体 |
| Associated with 卒業証書紀年法事件 |
| Disassociated from 卒業証書紀年法事件 |
| Disassociated from 元号さよなら声明 |
| Disassociated from 元号はいらない署名運動 |
| Disassociated from 元号廃止論 |
| Disassociated from 西暦併用を求める会 |
| Disassociated from 元号廃止 |
| Disassociated from 元号排斥 |
| Disassociated from 西暦表記を求める会 |