TOKYO — A powerful earthquake triggered a tsunami off the coast of Japan early Tuesday, near where three nuclear reactors melted down at a plant in Fukushima after a quake and tsunami in 2011.

Tuesday’s quake quickly brought evacuation warnings along the coast that was ravaged just over five years ago. For about 90 minutes, fears of the 2011 nuclear disaster were raised as a cooling system in one reactor in another nearby plant shut down. It was restored without incident.

The public broadcaster NHK exhorted residents of Fukushima Prefecture to leave coastal areas immediately. “Please move as far away from the shoreline as possible,” the announcer said. “Please remember the Great East Japan earthquake.”

A tsunami wave of about 55 inches hit the port of Sendai in Miyagi Prefecture about an hour and a half after the quake hit, and NHK said minor injuries had been reported. The first tsunami waves hit the coast at Onahama in Fukushima Prefecture at about 23 inches. At the Fukushima nuclear plant, the tsunami waves rose to about three feet. No deaths were immediately reported.