Japan will extend 250 million yen in emergency aid to China, which was hit hard by massive flooding, so the country can purchase medicine and medical equipment to deal with epidemics, Foreign Ministry officials said Tuesday.Japan already extended about 250 million yen in emergency aid to China from July to September, and it decided on the additional aid because of the severity of the flooding, the officials said. About 3,000 people have died and nearly 5 million houses were damaged because of the flooding, according to ministry officials.