A Japanese stamp made of wood, stone, or horn, engraved with the name of an individual, office, or institution and used instead of a signature in official transactions.
Origin of hanko
- Japanese hanko probably alteration (taken as if han seal, stamp) (ko child, also a noun-forming suff.) of earlier hankō publication, printing Japanese han board, block such as those used in woodblock printing (from Middle Chinese paːn´) (also the source of Mandarin bàn) Japanese kō to go, circulate (from Middle Chinese xfijaːjŋ) (also the source of Mandarin xíng)
From American Heritage Dictionary of the English Language, 5th Edition
- From Finnish Hanko.