The All-China Federation of Returned Overseas Chinese has begun to solicit historical documents and pictures concerning the Japanese invasions during World War II.
The move - which is another example of Japan's repeated provocations - poses a threat to China's air defense, says defense ministry spokesman.
Vice-President Li Yuanchao hosted a group of prominent Japanese industrial figures on Wednesday and asked them to help improve strained relations between China and Japan.
Chinese Vice President Li Yuanchao met Wednesday with a delegation from the Japan Business Federation.
In a quiet side room at Pigeon Corp's spacious lab north of Tokyo, researchers are on a high-tech quest to create a teat for babies' bottles that matches a breast-feeding mother's own.
Japanese military jets' intrusion into the East China Sea Air Defense Identification Zone on Saturday was dangerous and provocative, a Chinese general said on Tuesday.
Analysts have said the interference of two Japanese reconnaissance aircraft into a China-Russia naval exercise is against international law.
Japanese military planes have intruded on the airspace of China-Russia naval exercises, seriously violating international laws.
China on Friday urged Japan to stop provocation after Japanese leader Shinzo Abe said China's "unilateral drilling" created tensions in the South China Sea.
Defender Azusa Iwashimizu headed home from a corner kick from captain Aya Miyama in the dying seconds of extra time as Japan beat China 2-1 to reach the final at the AFC Women's Asian Cup here on Thursday.
Japanese Prime Minister Shinzo Abe made it public on Thursday that Tokyo would seek to exercise the right of collective self-defense, which would allow his country to fight alongside its allies beyond its borders.
Trade ministers from China and Japan met on Saturday on the sidelines of the APEC ministers' meeting, in the first ministerial-level talks since the dispute over the Diaoyu Islands began in 2012.