Five years after the Meiji Restoration, on the seventh of the second month of 1873, the Japanese Government issued the following decree:
The taking of human life is strictly prohibited by the law of the land, and the right to punish a murderer lies with the Government. However, since ancient times it has been customarily regarded as the duty of a son or younger brother to avenge the murder of his father or elder brother. While this is a natural expression of the deepest human feelings, it is ultimately a serious breach of the law on account of private enmity, a usurpation for private purposes of public authority, and cannot be treated as other than the crime of wilful slaughter. Furthermore, in extreme cases the undesirable situation often arises that one person wantonly and deliberately kills anothe in the name of revenge without regard for the rights and wrongs of the case or the justification for his act. This is to be deplored, and it is therefore decreed that vengeance shall be strictly prohibited. In future, should some close relative unfortunately be killed, the facts should be set out clearly an a complaint be laid before the authorities. Let it be plainly understood that anyone who ignores this injunction and adheres to the old customs, taking the law into his own hands to kill for revenge, will be subject to a penalty appropriate to his offence.