noun
high treason
A legal term for the crime of high treason, historically used in Japan's old criminal code (abolished). Now mainly encountered in historical or legal contexts.
大逆罪は、かつて天皇や皇室に対する重大な犯罪として規定されていた。
High treason was once defined as a serious crime against the Emperor or the Imperial Family.
反逆罪 is a broader term for treason or rebellion against the state, while 大逆罪 specifically referred to crimes against the Emperor under the old Japanese legal system.
Compound of 大逆 (high treason) + 罪 (crime). The term is historically associated with the now-abolished crime of high treason in pre-war Japanese law.