自由参加 じゆうさんか Meanings の-adjective, Noun free-for-all; open-to-all optional (to participate in); non-compulsory Kanji 自 self. Read as ジ. 由 reason. Read as ユウ. 参 take part. Read as サン. 加 add. Read as カ. Jinuma: Japanese Dictionary · Word lists