American sailors across Japan were confined to their bases and banned from drinking alcohol starting Monday as the U.S. Navy responded to a drunken-driving case that stoked anger nationwide.

The largely open-ended order applies to all sailors based in or transiting through Japan. Commanders are additionally urging civilian contractors and family members to observe it voluntarily.

The DUI case in Okinawa Prefecture was the latest in a spate of incidents there that have strained relations.