The debate over nuclear-powered submarines is likely to serve as a critical indicator of Japan’s strategic trajectory.

Japan has commissioned a new hunter-killer submarine that can operate in shallow seas to protect borders. Called Raigei or Thunder Whale, the diesel-electric submarine is initially planned to operate ...

American submarines adopted a calculated tactic that targeted Japan’s shipping lifelines rather than its fleets. By ...

TOKYO (AP) — Japan’s military said it dispatched a surveillance plane and a navy ship Tuesday after spotting a Russian submarine off the coast of a southwestern island near Taiwan. The Russian ...

Operational records from the Pacific War reveal one submarine that stood above all others in reputation and results. Its aggressive patrols, repeated sinkings, and ability to evade counterattacks made ...

The first female student was admitted to Japan's national naval submarine academy Wednesday after the end of a ban on women on the country's submarines. Saki Takenouchi, 26, entered the academy in a ...

Japan took the unusual step Monday of announcing that it had carried out the drills, which also involved two destroyers and a helicopter carrier. Japan took the unusual step Monday of announcing that ...