China, Japan and South Korea have put aside decades of animosity, at a summit to discuss how to handle the financial crisis. Relations between the three have been plagued by memories of Japan’s past military aggression. But the Chinese premier Wen Jiabao was given a warm welcome as he arrived at the historic meeting in southern Japan.Wen told the Japanese Prime Minister Aso Taro that the unprecedented summit was a milestone. They were joined by Lee Myung-bak, the South Korean president, whose currency has lost about a third of its value against the dollar this year. Between them, the economic giants account for three-quarters of the region’s economy and two-thirds of its trade, but all have had to introduce emergency financial measures to counter the crisis.