New threats have emerged and new politico-strategic contours have been drawn. Japan thus inwardly battles to respond to these changes by first convincing its people on threat perception and second by redefining its constitution that takes out the nuclear issue in the open and as some argue put Japan on road to nuclearisation. Since there remains no commie monolith, hence their interest in the far east region remains temporary. Though it remains as a stability factor but by continuing to provide for Japan's security, they obviate the need for Japan's revanchism. Japan's greatest threat comes from China.
China has a great design on Japan, military aggression is one of the means.
In 1884, a Chinese philosopher, K'ang Yu-wei wrote a treatise that had widespread influence throughout east Asia and was, as historians note, hailed by Mao Zedong when he took power in 1949. The text must still be well read by the leaders in Beijing. On the face of it the idea of a billion Chinese people combining with the technological and industrial prowess of Japan to form a supreme power can be laughed. But seeing Russia crippled and China's political and economic gains, the idea is not too farfetched. This worked well when the Soviet Union existed.