Shizai is one of the 6 types of capital punishment imposed on commoner criminals in the Edo Period, in which the criminal was beheaded and the corpse was used to test the sharpness of swords.
死罪（しざい）とは、江戸時代に庶民に科されていた6種類ある死刑のうちの一つで、斬首により命を絶ち、死骸を試し斬りにする斬首刑の刑罰のこと。