決まり事 きまりごと Also written 決まりごと Meanings Noun rule; established routine; standard operating procedure; SOP Kanji 決 decide. Read as きまる. 事 matter. Read as こと. Example sentences 私たちはこれらの古い決まり事を排除しなければならない。We must do away with these old rules. Common phrases 決まり事がある Jinuma: Japanese Dictionary · Word lists