Inro Signed Boxwood 3 Part Maiden and Frog Carved | 6" Long | Brown | 1 |Carved Brown Japanese Three Piece Inro Boxwood Maiden and Frog Ojime with Bathing Maiden Netsuke. This amazing piece is signed by the author on the belly of the frog. Inro ('seal basket') are small decorative containers that hang from the waist. They originated at the end of the sixteenth century and were worn by men to hold seals and herbal and other medicines. They were considered a particularly good way of keeping the contents sealed and fresh.