jmdict 1476580 Active (id: 45962)
八つ口； 八口
【 やつくち 】

1.

[n] ▶ small opening in the side of some traditional Japanese clothing (located where the sleeve meets the bodice, below the armpit) Cross references:   ⇐ see: 2592300 詰め袖【つめそで】 1. kimono with completely attached sleeves (i.e. lacking an opening on the side under the armpit)   ⇐ see: 2593400 脇明け【わきあけ】 2. small opening in the side of traditional Japanese clothing (where the sleeve meets the bodice, below the armpit); clothing with such an opening (usu. worn by women or children)