うわなりうち

Japanese

edit
For pronunciation and definitions of うわなりうち – see the following entry.
後妻打ち
[noun] (historical) an ancient Japanese custom of a first wife to attack any of her husband's later wives and/or concubines, usually for revenge or to protect her own interests [late Heian- to around the Sengoku period]
[noun] (historical) an arranged striking between wives and concubines held at a (legal) wife's house [around the Muromachi to mid-Edo period]
(This term, うわなりうち (uwanariuchi), is the hiragana spelling of the above term.)