The Yomiuri ShimbunAn earthquake measuring upper 6 on the Japanese seismic intensity scale of 7 struck off Yamagata Prefecture on Tuesday night.
A total of 26 people had been reported injured in Yamagata, Niigata, Miyagi and Ishikawa prefectures as of 9:45 a.m. Wednesday, according to the Fire and Disaster Management Agency.
Damage to houses was also confirmed as the effects of the quake came to light.
Heavy rain started in some areas. A notice to prepare for evacuation due to the risk of landslides was issued Wednesday to 216 households in Murakami, Niigata Prefecture, where the quake registered an upper 6 and a heavy rain warning was issued.
The National Police Agency had not received any reports of fatalities. The disaster agency said a person in Tsubame, Niigata Prefecture, was seriously injured, while 10 people in Tsuruoka, Yamagata Prefecture, suffered minor injuries.
According to a tally by The Yomiuri Shimbun, more than 7,200 residents evacuated in the three prefectures of Yamagata, Niigata and Ishikawa, where a tsunami warning was announced.