The US government says national security adviser Jake Sullivan has tested positive for COVID-19.
Sullivan is reportedly showing no symptoms and had not been in close contact with President Joe Biden.
A strong earthquake struck the Noto region on the Sea of Japan coast in central Japan around 3:08 p.m. on Sunday.
Officials say there is no tsunami threat.
Hydrangea flowers are in full bloom at a temple near Tokyo.
The Nichiunji temple in Chiba Prefecture has about 20,000 hydrangea plants in its compound.
A magnitude 5.2 earthquake has struck central Japan.
Officials say there is no tsunami threat.
A group of researchers says tests of two coronavirus drugs on hamsters indicate that the risk of drug-resistant variants emerging is limited.
The study was conducted by Professor Kawaoka Yoshihiro from the University of Tokyo's Institute of Medical Science and other researchers.
A Japanese atomic bomb survivor, or hibakusha, and a descendant of hibakusha are exchanging views with participants in the first meeting of the states that are party to the Treaty on the Prohibition of Nuclear Weapons.
They are in Vienna, Austria, ahead of the meeting, which will start on Tuesday.
Japanese tennis player Osaka Naomi has withdrawn from Wimbledon with a leg injury.
Organizers of the Wimbledon championship updated the entry list on Saturday to reflect Osaka's withdrawal.
The Tokyo Metropolitan Government reported 1,681 new cases of the coronavirus in the capital on Saturday, 155 more than a week ago.
It also reported four deaths.
About 80 people rallied in Hiroshima on Saturday to call on the Japanese government to join the Treaty on the Prohibition of Nuclear Weapons. The first meeting of the states that are party to the treaty kicks off in Vienna on Tuesday.
The rally participants had responded to calls by atomic bomb survivors group and anti-nuclear group in Hiroshima. They gathered in front of the Atomic Bomb Dome, near the epicenter of the 1945 blast.
Japanese kelp harvesters are set to start this year's season next week near a group of Russian-controlled islands. The islands are claimed by Japan as an inherent part of its territory. The Russian side has sent a written directive of the agreement terms.
Japanese crews usually start harvesting the seaweed near Kaigara Island on June 1 after fishing associations in the two countries conclude a deal on the conditions of the operation.
The Japanese Maritime Self-Defense Force is monitoring a flurry of Russian and Chinese naval activities in waters off Japan.
MSDF officials say one of their vessels spotted seven Russian navy ships passing through the Izu Island chain in the Pacific south of Tokyo from Thursday to Friday.
Japan's Supreme Court has ruled that the government was not responsible for the 2011 accident at the Fukushima Daiichi nuclear power plant.
The ruling handed down on Friday covers four separate damages lawsuits filed by people including those who had to evacuate their homes in Fukushima and three other prefectures. The defendants were the state and the plant operator, Tokyo Electric Power Company.
Prosecutors in Nagoya, central Japan, have decided not to bring charges against immigration officials over the death of a Sri Lankan woman at a detention facility last year.
Wishma Sandamali died in March 2021 after complaining of ill health at the facility, run by the Nagoya Regional Immigration Services Bureau. She had been detained for overstaying her visa. She was 33 years old.
Members of a Japanese non-profit organization have provided details of what they witnessed at hospitals in Kyiv after a visit to the Ukrainian capital earlier this month.
Peace Winds Japan held a news conference in Tokyo on Friday to drum up support for Ukraine.