People started to avoid the death penalty for nobles of the capital during the Heian Period, and few people were charged with muhon, as it was a severe crime leading to the death penalty.
平安時代頃から、中央貴族に対する死刑は好まれなくなり、死刑に繋がる重い刑罰である謀反・謀叛はほとんど適用されなくなる。