Japan's northeastern region braced for aftershocks Sunday following an earthquake of magnitude 7.3 overnight that injured more than 150 people, cut power and water, and disrupted bullet train services, with some residents looking weary as they tidied up the mess in their homes and shops.

More than 100 people were reported injured on Sunday after an earthquake with a magnitude of 7.3 struck northeastern Japan late the previous night, causing blackouts, water cuts and bullet train suspensions.