The Yomiuri Shimbun An estimated magnitude-5.9 quake occurred in Osaka Prefecture at about 7: 58 a.m. Monday.
An 80-year-old man and a young 9yo girl were killed in Japan, crushed by collapsing walls, public broadcaster NHK reported. Japanese authorities don't confirm death until after an examination at a hospital.
The quake hit western Japan early Monday, but there were no immediate reports of major damage or risk of tsunami waves, officials said. There are reports of scattered damage including broken glass and concrete.
Mr Abe said he had instructed his staff to "swiftly collect information on damage, make utmost efforts in rescuing and saving lives". More than 170,000 homes were without power as of 8:20 a.m., regional utility Kansai Electric Power Co. said.
The tremor caused power outages in some areas, suspending train operations during the morning commuting hours.
Train guide electric boards tilt following an quake at Ibaraki-shi Station in Ibaraki City, north of Osaka prefecture on June 18, 2018. Television images showed passengers getting off trains onto the tracks between stations. Product shipments from the refinery have also been halted, he added.