| Created |
| Associated with 改元日 |
| Associated with 改元 |
| Associated with 立年改元 |
| Associated with 称元 |
| Associated with 建元 |
| Associated with 災異改元 |
| Associated with 祥瑞改元 |
| Associated with 革年改元 |
| Associated with 代始改元 |
| Associated with 即日改元 |
| Associated with 踰年改元 |
| Associated with 翌日改元 |
| Associated with 踰月改元 |
| Associated with 越年改元 |
| Associated with 革命勘文 |
| Associated with 即位改元 |
| Associated with 称元法 |
| Associated with 称元制 |
| Associated with 何々改元 |
| Associated with ○○改元 |
| Disassociated from 建元 |
| Disassociated from ○○改元 |
| Disassociated from 何々改元 |
| Disassociated from 革命勘文 |
| Disassociated from 代始改元 |
| Disassociated from 災異改元 |
| Disassociated from 革年改元 |
| Disassociated from 改元 |
| Disassociated from 称元法 |
| Disassociated from 祥瑞改元 |
| Disassociated from 称元 |
| Associated with 改元の時期 |
| Associated with 改元の期日 |
| Associated with 踰月稱元法 |
| Associated with 踰年称元 |
| Associated with 踰年稱元 |
| Associated with 踰月称元 |
| Associated with 踰月称元法 |
| Associated with 踰月稱元 |
| Associated with 踰年稱元法 |
| Associated with 踰年称元法 |
| Associated with 改元時期 |
| Associated with 称元法 |
| Associated with 改元期日 |
| Associated with 遡及年号 |
| Associated with 未来年号 |
| Associated with 延長年号 |
| Associated with 年始に遡って改元 |
| Associated with 年始遡及年号 |
| Associated with 年始遡及年号法 |
| Associated with 改元の基準点 |
| Associated with 踰日改元 |
| Associated with 踰年正月改元 |
| Associated with 践祚同年同日改元 |
| Associated with 即時改元 |
| Associated with 翌年改元 |
| Associated with 立年踰日改元 |
| Associated with 立年即日改元 |
| Associated with 即位同時改元 |
| Associated with 践祚同日改元 |
| Associated with 践祚踰年改元 |
| Associated with 踰󠄂月改元 |
| Associated with 踰󠄂年改元 |
| Associated with 明年改元 |
| Associated with 当年改元 |
| Associated with 次年改元 |
| Associated with 当年称元 |
| Associated with 越年称元 |
| Associated with 当年称元法 |
| Associated with 越年称元法 |
| Associated with 改元伝達 |
| Associated with 代始改元の時期 |
| Associated with 崩年改元 |
| Associated with 即位称元法 |
| Associated with 稱元法 |
| Associated with 即位称元 |
| Associated with 不改年号 |
| Associated with 改元伝達ルート |