Kei Nishikori believes there are risks associated with Japan hosting the Olympic Games this summer. Photo: Chema Moya/EPA

Japan’s top-ranked men’s tennis player Kei Nishikori added his voice to concerns about staging the Olympic Games in Tokyo in July, as the country batt(...)

Japan’s prime minister Shinzo Abe in the upper house of parliament in Tokyo. Photograph: Jiji Press/AFP via Getty Images

A mash-up of bingo hall, pinball and slot arcade, pachinko is hugely popular in Japan. Players sit in crowded rooms hermetically sealed off from the o(...)

Passengers  seen on  deck of the quarantined Diamond Princess cruise ship, docked at the Daikoku Pier. Photograph: Tomohiro Ohsumi/Getty

Two elderly passengers taken off the Diamond Princess cruise ship because they were infected with coronavirus have died, Japan’s Health Ministry said.(...)

The anisotropies of the cosmic microwave background as observed by the Planck satellite

How do you find out about something that happened almost 14 billion years ago? Researchers looking at the growth of the early universe are piecing tog(...)