The exercise, known as Northern Viper 17, will take place on Hokkaido — Japan's northern-most main island — and will last until Aug. 28.
According to the U.S. Pacific Command, the drill will include 500 Marines and 18 aircraft operating out of the 35th Fighter Wing at Misawa Air Base, on the northern tip of the island of Honshu.
"We are improving our readiness not only in the air, but as a logistical support team," Col. R. Scott Jobe, the 35th Fighter Wing commander, said in a statement. "We are in a prime location for contingency purposes and this exercise will only build upon our readiness in the case a real-world scenario occurs."
The exercise began hours after Japan's defense minister said the Japanese military could shoot down North Korean intercontinental ballistic missiles before they reach the U.S. territory of Guam.