じゆうさんか 自由参加 LinksSentence search for 自由参加Sentence search for じゆうさんかKanji details for 自, 由, 参 and 加Edit in JMdict Noun which may take the genitive case particle 'no', Noun1. free-for-all; open-to-allNoun which may take the genitive case particle 'no', Noun2. optional (to participate in); non-compulsory Discussions Log in to talk about this word.