Japan is the principal cause for the current Sino-Japanese tension, said Pang Zhongying, president of the Institute of International Relations of the Nankai University, the Hong Kong based Takungpao reported.

Japan has adopted an intransigent attitude towards China and been provocative in the territorial issue and the Taiwan issue, Pang pointed out.

Japan has many problems, for instance, it must shoulder bigger international responsibility, including responsibility to the history. The comfort women, victims of the biochemical weapons haven't received reparation from Japan yet. To gain China's support Japan must change its stand at the historical issue. If so easing the tension with China is still possible.

China and the Korea Peninsula are two most important neighbors of Japan in Asia. China is enormous in terms of economy and population; ROK and DPRK are very important countries in East Asia too. Worsening relationship with these countries equals to isolating Japan in Asia, which will do no good to itself, said Pang.

By People's Daily Online