Home2019 Treaties and Agreements ...Japan (19-105) – Agreement on Enhancing Cooperation in Preventing and Combating Serious Crime hide Japan (19-105) – Agreement on Enhancing Cooperation in Preventing and Combating Serious Crime TIAS Office of Treaty Affairs January 5, 2019 Law Enforcement: Cooperation Agreement signed at Tokyo February 7, 2014; entered into force January 5, 2019. Download agreement [2 MB] Tags Japan Law Enforcement Treaties