A 6.9-magnitude earthquake followed by a 7.1 tremor struck off southern Japan on Thursday, the United States Geological Survey said, with the local meteorological agency warning of tsunamis striking coastal areas.
Tsunamis of up to one metre were expected to arrive or have arrived in some coastal areas in Kyushu and Shikoku islands, broadcaster NHK reported.
'Tsunamis will strike repeatedly. Please do not enter the sea or approach the coast until the warning is lifted,' the Japan Meteorological Agency said on X.
There were no immediate reports of any damage.
The USGS said that the first quake hit at 4.42pm (7.42am GMT) at a depth of 33 kilometres, about 29 kilometres southeast of Miyazaki on Kyushu.
