私し書しょ箱ばこTop 20000MeaningsNoun1. post office box (Abbreviation)Kanji used私private書write箱boxPitch accentししょばこUsed in vocabulary郵ゆう便びん私し書しょ箱ばこpost office boxNoun私し書しょ箱ばこ番ばん号ごうPost Office box address; P.O.box addressNoun