Japanese: 石抱 / 算盤責

“Ishidaki” (lit. “stone hugging”) is a form of torture where one places weight on a persons legs while kneeling on a “soroban” ((shin) torture board).

The punished person is bound and placed in a kneeling position, on top of a ridged board, with stone weights placed on their lap.

Typical loads placed on the legs seem to be in the range of 250kg (~550lbs) and go up from there.

Also called ishi-zeme (石責), “stone torture.”