In the last three months, the Osprey is the third Marine Corps aircraft in the region to lose a part while in flight.
The sailors, some assigned to the carrier Ronald Reagan, are suspected of buying, selling and using illegal drugs.
The Boeing AH-64 combat helicopter crashed in Kanzaki city in Saga prefecture seven minutes after taking off.
A sailor assigned to the carrier USS Ronald Reagan was arrested by Tokyo police after being accused of sexual assault.
Okinawa remains angry over a series of mishaps last month involving U.S. Marine Corps helicopters.
The Japanese government will send inspectors to Marine Corps bases on Okinawa to verify the safety of U.S. aircraft.
For the first time, Japan has defended U.S. military aircraft under security legislation passed in 2016 .
No injuries or damage were reported Tuesday after a Marine helicopter made an emergency landing on Okinawa for the third time...
According to sources, McMaster met with officials from South Korea and Japan.
Japan's public broadcaster mistakenly sent an alert Tuesday warning citizens of a North Korean missile launch.