さんかじゆう

参加自由

表記・読み：さんかじゆう

1. 1

   free-for-all; open-to-all

   nouns which may take the genitive case particle 'no'名詞
2. 2

   optional (to participate in); non-compulsory

   nouns which may take the genitive case particle 'no'名詞