A rocket engine exploded during a test in Japan on Friday but there were no injuries, an official at Japan's Education, Science and Technology Ministry said.
Cosmo Energy Holdings' shareholders approved a "poison pill" takeover defence on Thursday, in a controversial vote that excluded certain activist shareholders and has implications for hostile takeover attempts in Japan.
Mitsubishi Heavy Industries on Wednesday said it expects to see record defence orders this business year as Japan embarks on its biggest military build up since World War Two.
Japanese billionaire Yusaku Maezawa set out to became the first space tourist in more than a decade to travel to the International Space Station (ISS) when he blasted off on Wednesday, a voyage he sees as a dry run for his planned trip around the moon with Elon Musk's SpaceX in 2023.