投函とうかんtoukan投とう函かん投とう函かんShow answer(Space)Suspend(@)投とう函かん投とう函かんtoukanCommonRelative commonness of this word, based on various sources (incl. newspapers)CommonNoun (common)Noun (common) (futsuumeishi)Noun (common)Noun/participle taking aux. verb するNoun or participle which takes the aux. verb suruNoun/participle taking aux. verb するmailing; posting投とう函かん投とう函かんtoukanmailing; postingWhat does 投函 mean in English?mailing; posting(n, vs)Search the picture dictionary for 投函
