| Created |
| Associated with G |
| Associated with エコ暦 |
| Associated with E |
| Associated with 原爆紀元 |
| Associated with 原爆暦 |
| Associated with B・A |
| Associated with 原子 |
| Associated with 原子元年 |
| Associated with A・A |
| Associated with ツカサ年号 |
| Associated with 原子暦 |
| Associated with AA |
| Associated with BA |
| Associated with (no title) |
| Disassociated from 原子元年 |
| Disassociated from 原子暦 |
| Disassociated from G |
| Disassociated from 原爆紀元 |
| Disassociated from 原爆暦 |
| Disassociated from BA |
| Disassociated from 原子 |
| Disassociated from ツカサ年号 |
| Disassociated from AA |
| Disassociated from A・A |
| Disassociated from E |
| Disassociated from エコ暦 |
| Disassociated from B・A |
| Associated with 琉球 |
| Disassociated from (no title) |
| Associated with 琉球 (元号) |
| Associated with 琉球元年 |
| Associated with 琉球 (私年号) |