１８禁じゅうはちきんMeaningsNoun1. 18 certificate; R-18; restricted to those 18 years or olderOther spellings十じゅう八はち禁きんUsage share unknownKanji used禁prohibitKanji in other spellings十ten八eightPitch accentじゅうはちきんExamples1十じゅう八はち禁きんなので要よう注ちゅう意い！WARNING - 18+ ONLY.