“It shook for such a long time,” she said.
She said other volunteers who had been in coastal areas were evacuated to a square and a parking lot as they waited for the tsunami warning to be lifted.
Japan has barely begun to rebuild from last year's magnitude-9.0 earthquake, which triggered a tsunami that swelled to 20 meters high in some areas, ravaging dozens of coastal communities in Miyagi and elsewhere.
About 19,000 people were killed and some 325,000 people remain displaced from their homes, living in barracks and other temporary quarters.