JMdict entry #1377320

1. noun (common) (futsuumeishi) legal wife (of a noble) (as opposed to a concubine)
   see: 側室, 本妻
2. noun (common) (futsuumeishi) room for receiving guests
   see: 表座敷・おもてざしき
3. noun (common) (futsuumeishi) rare term heir; successor