Japan and China plan to hold in bilateral security talks in Tokyo as early as April — the first in four years between their foreign and defense ministries, diplomatic sources said on Wednesday.

Japan is expected to use the occasion to relay its plans to enact legislation to put into effect last July's Cabinet decision to reinterpret the pacifist postwar Constitution to allow the country to exercise the right to collective self-defense.

Japan is also likely to ask China to make its military spending more transparent and explain the reasons behind its military expansion, the sources said.