BEIJING, Feb. 20 -- China on Thursday urged Japan to abide by international obligations for nuclear nonproliferation and address the supply-demand imbalance of nuclear material.

Chinese Foreign Ministry spokeswoman Hua Chunying said at a regular press briefing that Japan's stockpile of nuclear material, including weapons-grade material, is an issue of supply-demand imbalance, nuclear security and proliferation, which threaten peace and stability in the region and the world at large.

It is incompatible with Japan's membership of the Treaty on the Nonproliferation of Nuclear Weapons and International Atomic Energy Agency, Hua added.

Hua restated China's requests for Japan to keep its promises on nuclear materials and honor its obligations to nonproliferation.