Home1997 Treaties and Agreements ...Japan (12869) – Agreement Regarding Mutual Assistance Between Customs Administrations hide Japan (12869) – Agreement Regarding Mutual Assistance Between Customs Administrations TIAS Office of Treaty Affairs June 17, 1997 Law Enforcement: Customs Agreement signed at Washington June 17, 1997; Entered into force June 17, 1997. With exchange of notes. Download attachment [191 KB] Tags Japan Law Enforcement Treaties