Gen. Kenichiro Nagumo, the first commander of Japan’s Joint Operations Command, reviews troops ahead of the activation ceremony at Camp Ichigaya in central Tokyo, March 24, 2025.

Effective cooperation — in joint and combined operations, both operational and tactical, is a modern-day imperative. Navy and Marine Corps component headquarters can cross-attach subject matter ...

TOKYO—The Pentagon will upgrade and expand its three-star command in Japan to handle operational control of U.S. forces based there, part of an effort to deepen ties between the U.S. and ...