An earthquake of 5.9 magnitude hit western Japan early today, but there are no immediate reports of major damage or risk of tsunami waves.
According to the Japanese meteorological agency, earthquake struck at a depth of 15.4 kilometres near Osaka.
The tremor caused a blackout for thousands of houses and suspended train operations during the morning commuting
hours.
Prime Minister Shinzo Abe told reporters the government is working united with its first priority on saving people's lives.
Mr Abe said he has instructed his staff to swiftly collect information on damage, make utmost efforts in rescuing and saving lives and provide appropriate information to the public.