自じ由ゆう参さん加か

noun which may take the genitive case particle 'no', noun

open to all; free-for-all

Describes an event or activity that anyone can join without restrictions.

• このイベントは自じ由ゆう参さん加かです。

  This event is open to everyone.

noun which may take the genitive case particle 'no', noun

optional; non-compulsory

Indicates that participation is not required; you can choose whether to take part.

• 研けん修しゅうは自じ由ゆう参さん加かなので、興きょう味みがあればどうぞ。

  The training is optional, so feel free to join if you're interested.