TOKYO  In what would be a sweeping overhaul of its cold war-era defense strategy, Japan is about to release new military guidelines that would reduce its heavy armored and artillery forces pointed north toward Russia in favor of creating more mobile units that could respond to China’s growing presence near its southernmost islands, Japanese newspapers reported Sunday.

The realignment comes as the United States is making new calls for Japan to increase its military role in eastern Asia in response to recent provocations by North Korea as well as China’s more assertive stance in the region.

The new defense strategy, likely to be released this week, will call for greater integration of Japan’s armed forces with the United States military, the reports said. The reports did not give a source, but the fact that major newspapers carried the same information suggested they were based on a background briefing by government officials.

The new guidelines also call for acquiring new submarines and fighter jets, the reports said, and creating ground units that can be moved quickly by air in order to defend the southern islands, including disputed islands in the East China Sea that are also claimed by China and Taiwan. These disputed islands are known as the Senkakus in Japanese and the Diaoyu in Chinese.