abdication ceremony
Refers to the formal ceremony in which a monarch or emperor abdicates the throne. In modern Japan, this term is strongly associated with the 2019 abdication of Emperor Akihito.
The Emperor's abdication ceremony was held at the Imperial Palace.
Compound of 退位 (abdication) + 式 (ceremony). The term gained prominence in the context of Emperor Akihito's abdication in 2019.