Japan says China's maritime expansion making the world 'greatly worried'

Japan's Foreign Minister Fumio Kishida attends a news conference after a meeting with his Russian counterpart Sergei Lavrov in Moscow, Russia, in this September 21, 2015 file photo. REUTERS/Maxim Zmeyev

TOKYO (Reuters) - Japanese Foreign Minister Fumio Kishida, speaking ahead of a visit to Beijing, said on Monday China was making the world "worried" with its military buildup and maritime expansion in the East and South China Seas.

Ties between China and Japan, the world's second- and third-largest economies, have long been plagued by a territorial dispute, regional rivalry and the legacy of Japan's World War Two aggression.