noun, noun or participle which takes 'suru'
cutting the wedding cake
Refers specifically to the ceremonial first cut of the wedding cake by the bride and groom, often as part of the reception.
披露宴で新郎新婦が入刀を行った。
The bride and groom performed the cake cutting at the reception.
A more general term for cake cutting, not limited to weddings. 入刀 is specifically the ceremonial wedding cake cutting.
Compound of 入 (にゅう, 'enter') and 刀 (とう, 'sword' or 'knife'), literally 'inserting the knife'. The term is used almost exclusively for the wedding cake-cutting ritual.