急きゅう行こう便びんMeaningsNoun1. express mailKanji used急hurry行go便convenienceComposed of急きゅう行こうhurrying (to somewhere); rushing; hastening; express (train)Noun便びんflight (e.g. airline flight); trip (e.g. train trip); sailing (e.g. ferry voyage); service; mail; post; letter; opportunity; chanceNoun