Many Japanese have been looking forward to seeing top athletes in their home towns during pre-Olympic camps.
The Fukushima nuclear plant still contains radioactive water as an icy barrier was activated around its reactors.
The Solar Impulse 2 will need repairs to its right wing before it can resume its attempt to fly around the world.
UN-backed panel says climate change impacts already taking place globally, however, world is unprepared for risks.
A large and powerful typhoon was heading towards Japan, threatening to bring strong winds and torrential rain.