Соответствующая норма
Japan
Practice Relating to Rule 128. Release and Return of Persons Deprived of Their Liberty
Japan’s Law concerning the Punishment of Grave Breaches of International Humanitarian Law (2004) states:
Article 4 (Crimes of delaying the repatriation of Prisoners of War)
(1) When a person who has the authority to repatriate prisoners of war, in cases where an armed conflict that caused the internment of prisoners of war has ceased, without justifiable reason, delays the repatriation of prisoners of war to the other Party to the armed conflict … the person shall be punished by imprisonment with labour for not more than 5 years.
(2) When a person referred to in the preceding paragraph, without justifiable reason, delays the repatriation of sick and wounded prisoners of war who are fit to travel to the repatriation territory, the person shall be dealt with in the same way prescribed for in the preceding paragraph. 
Japan, Law concerning the Punishment of Grave Breaches of International Humanitarian Law, 2004, Article 4.