China on Thursday rejected Japan's accusation on China's nuclear activities.

"We do not know what exact purpose the Japanese leader intended to achieve by referring to China's nuclear issue under the current circumstances," Chinese Foreign Ministry spokesman Ma Zhaoxu told a regular press briefing.

His comments came in response to a question concerning Japanese Prime Minister Taro Aso's recent remarks on China's nuclear policy.

In a speech during his visit to Germany on Monday, Aso said the recent activities in China and the Democratic People's Republic of Korea were threatening security in the Asian region.

"China's nuclear policy is very transparent. China's position on the nuclear disarmament is obvious to all," said Ma.

(Xinhua News Agency May 7, 2009)