[noun](historical) the eight unpardonable crimes in ancient Japanese law, consisting of 謀反(muhen), 謀大逆(bōtaigyaku), 謀叛(muhon), 悪逆(akugyaku), 不道(fudō), 大不敬(daifukei), 不孝(fukō), and 不義(fugi)
(This term, 八逆, is an alternative spelling of the above term.)