The Regional Comprehensive Economic Partnership（RCEP）is a regional integration process jointly initiated and promoted by China and Japan. Japan’s strategic consideration and policy orientation towards RCEP significantly have an impact on its development direction and negotiation status. From the geopolitical and geo-economic perspective，RCEP contributes to Abenomics and is indispensable to Japan’s FTA strategy，serving as an integral part of the existing network of bilateral FTAs as well as a valuable platform for mitigating the collisions among different regional mechanisms in East Asia. Japan are actively pursuing a strategic balance among RCEP，China-Japan-Korea FTA and Trans-Pacific Partnership Agreement（TPP），while the triangle interactions among TPP，Transatlantic Trade and Investment Partnership（TTIP）and Japan-EU economic partnership agreement（EPA）also impose a regulatory impact on the development of RCEP negotiations.