蓋ふた開あけ

noun

opening; beginning; commencement

Literally 'lid opening', used figuratively for the start or opening of an event, project, or period. Often implies the initial stage or the moment something begins.

• 新しん年ねん度どの蓋ふた開あけは来らい月げつだ。

  The opening of the new fiscal year is next month.

• プロジェクトの蓋ふた開あけに立たち会あった。

  I was present at the commencement of the project.