鏡かがみ開びらきMeaningsNoun1. cutting the New Year's rice cake (January 11th)2. traditional breaking of a sake cask at weddings, receptions, etc.Kanji used鏡mirror開openPitch accentかがみびらきComposed of鏡かがみmirror; looking-glass; barrel head; page added at the beginning of a document mentioning its purpose, date, author, etc.; mirror-shaped mochiNoun開ひらきopening; gap; dried and opened fish; extensionNoun