第21手：砧
(きぬた)
逆向き挿入の48手の１つ、「砧(きぬた)」をイラスト付きで説明
砧
仰向けにした女性のお尻に腰枕などを当てて陰部が上向きになるよう体を曲げさせる。男性は逆向きになって、上からこれを貫く。「砧：きぬた」とは槌 (つち) で布を打ちやわらげ、つやを出すのに用いる木または石の台のこと。別名、郭つなぎ。
Anvil(Kinuta)
The woman lies on her back. Then a pillow is placed under her lower back so that her hips are raised till her crotch is completely upturned and exposed. Turning his back on her, the man mounts her from above. "Kinuta" is a wooden or stone anvil used for softening cloths. Also known as "Kuruwa Tsunagi" (Brothel Hitch).