noun
coronation ceremony; enthronement
Refers specifically to the formal ceremony in which a monarch is crowned or enthroned.
新しい国王の戴冠式が来月行われる。
The new king's coronation ceremony will take place next month.
即位式 is a more general term for an enthronement ceremony, while 戴冠式 specifically involves the placing of a crown.
Compound of 戴冠 (たいかん, 'coronation') + 式 (しき, 'ceremony'). The exact historical derivation of 戴冠 is uncertain, but it is conventionally associated with the meaning 'to wear a crown'.