Home2021 Treaties and Agreements ...Japan (21-528) – Extension of Agreement Concerning Reciprocal Defense Procurement hide Japan (21-528) – Extension of Agreement Concerning Reciprocal Defense Procurement TIAS Office of Treaty Affairs May 28, 2021 Defense Effected by exchange of notes at Tokyo May 28, 2021; entered into force May 28, 2021. Amendment of agreement signed June 3, 2016: TIAS 16-603. Download Agreement [1 MB] Tags Defense Japan Treaties