Commanders of amphibious forces from the Indo-Pacific region and Europe have viewed demonstrations by Japanese and US personnel held near Tokyo.
The Pacific Amphibious Leaders Symposium, or PALS, has been held in Japan since Monday. Commanders from 18 countries are taking part in the event.
They inspected amphibious vehicles and other equipment at Japan's Maritime Self-Defense Force's Yokosuka base near Tokyo on Thursday.
They then visited the Ground Self-Defense Force's Camp Kisarazu, Chiba Prefecture, east of Tokyo.
The participants watched a demonstration by Japan's Self-Defense Forces and the US Marine Corps operating Osprey transport aircraft, as well as surface-to-ship missiles and high-mobility rocket launcher systems. Those munitions would be used to defend Japan's remote islands.
Observers say their display appears to be aimed at showing the two nations' resolve to increase multi-national cooperation, with due consideration of increased maritime activities by China.
Japan's Ground Self-Defense Force's chief of staff, General Yoshida Yoshihide, told reporters that Japan will promote multilateral cooperation among countries in the Indo-Pacific region, with collaboration between the SDF and the US Marines at its core. He said it is important to create a desirable security environment in the region.
The Commander of US Marine Corps Pacific, Lieutenant General Steven Rudder, said his forces live and train in the Indo-Pacific region to "stand in and by" their allies and partners.