The Framework Agreement for Comprehensive Economic Partnership (CEP) between the Association of Southeast Asian Nations and Japan was signed in Bali, Indonesia, on 8 October 2003. Subsequently, the ASEAN Japan Comprehension Economic Partnership (AJCEP) was signed after 11 rounds of negotiation over a period of four years. Ministers of ASEAN Member States and Japan then completed the signing of the AJCEP Agreement on 14 April 2008.

Singapore implemented the AJCEP Agreement on 01 January 2009.

As of 01 June 2009, 8 countries (Japan, Singapore, Malaysia, Brunei, Viet Nam, Laos, Myanmar and Thailand) have implemented the AJCEP Agreement.