The Japanese government has said it will revise its three security documents within the year and is considering including language on "studying the introduction of nuclear-powered submarines for the Self-Defense Forces."

Reports say that if "exploring the possession of nuclear submarines" is included in the three key security documents, it would create conditions for the government to launch related research, after which the Japanese government would decide whether to acquire nuclear submarines.

In response, experts from several countries said Japan's pursuit of nuclear-powered submarines poses a threat to peace and stability in the Asia-Pacific region.