The drills aimed to demonstrate the allies' "capabilities to conduct a precision strike at the origin of provocations", Seoul says, after North fires ballistic missile over Japan for the first time in five years.
Tour groups are expected to take responsibility for ensuring visitors respect Japan's near-universal mask-wearing and other measures that have helped keep the toll from Covid-19 comparatively low.
Rescue operation for missing tour boat in Japan intensifies as more dead are found, and 16 tourists are still unaccounted for.
The global coronavirus pandemic has affected over five million people, with around 327,000 deaths. Here are more coronavirus-related updates for May 20:
The Ainu minority has long suffered discrimination. The Japanese government in the 19th century banned them from practising their customs and using their language. Although there has been gradual change, the Ainu say much more needs to be done.
The death toll has hit 44 from a powerful earthquake that struck the northern Japanese island of Hokkaido last week, the government said. Rescue workers are still searching for the missing.
At least eight people are confirmed dead according to Japan's public broadcaster NHK after an earthquake rocked the island of Hokkaido early on Thursday. Authorities said a nuclear power plant on the island was secure.
Prime Minister Shinzo Abe is poised to take advantage of a weak political opposition. However, polls suggest there is an opening for a new party formed by Tokyo Mayor Yuriko Koike.
A prominent Chinese tabloid owned by the Communist Party's official 'People's Daily' says China should remain neutral if the DPRK targets the United States. But it also warns that a US first strike would bring China to the defence of its neighbour.
Seven-year-old Japanese boy Yamato Tanooka was found alive on Friday, six days after his parents left him near the bear-inhabited forests of Hokkaido, Japan to discipline him.
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