Japan's military activated its first marine unit since World War II - here's how they're training to recapture an island from enemy invaders

ARDB is Japan's first amphibious warfare brigade since World War II, comprised of around 2,100 troops.

A recent 20-minute exercise showed how Japanese forces would recapture an island from invaders.

Source: Reuters

Japan has been at odds with China over the control of remote, uninhabited islands on the East China Sea. The dispute has strained ties between the two countries due to the potential economic value — such as oil and gas reserves, shipping lanes, and fishing grounds — in the area.

"Given the increasingly difficult defense and security situation surrounding Japan, defense of our islands has become a critical mandate," Japan vice defense minister Tomohiro Yamamoto said in a speech.

Source: Kyodo News

The ARDB was reportedly modeled after the US Marine Corps' Marine Expeditionary Units and received advice from US liaisons.

Source: Kyodo News, Reuters

The ARDB is expected to be upgraded to around 3,000 troops, 17 V-22 Ospreys, and 52 Amphibious Assault Vehicles.

Source: Kyodo News

Although countries like China greatly outspend Japan in defense spending, some analysts believe Japan's armed forces could "stand toe to toe with anybody."

Source: CNN

"The Amphibious Rapid Deployment Brigade will show to the international society our firm resolve to defend our islands," a senior Defense Ministry official reportedly said.

Source: Kyodo News