For the past few years regionalism has been progessing in East Asia with the likes of China Japan and Korea (CJK) as the most prominent actors. Unfortunately with the absence of trade arrangement amongst the CJK the present regional trade scheme is not sufficient to reach sustainability. This paper uncovers the inefficient scheme through Engle- Granger Cointegration and Error Correction Mechanism. Moreover the paper underlines the importance of triangular trade agreement for accelerating the phase of growth in CJK which eventually create a spillover effect to East Asia as a whole. Employing Two Stage Least Squares in a static panel fixed effect model the paper argues that the spillover effect will function as an impetus for creating region-wide FTA. Furthermore the paper also identifies a number of economic and political factors that can support the formation of East Asian Regionalism.