Nipponica

Tsunamis of up to one metre were initially expected to arrive or had arrived in some coastal areas in Kyushu and Shikoku islands, the JMA said.

The agency also said a small tsunami was possible in Chiba, about 850km from the epicentre.

“Tsunamis will strike repeatedly. Please do not enter the sea or approach the coast until the warning is lifted,” the agency said on social media platform X.

However, tsunamis of only 50cm, 20cm, and 10cm were confirmed to have hit some places, including the port of Miyazaki, more than an hour after the quake, it said.