TOKYO -- A number of Japanese companies have been trying, so far unsuccessfully, to get commercial launches of small rockets off the ground. But they have not given up.
Businesses hone their technology as approval of commercial launches nears

The SS-520 minirocket failed after liftoff in its first launch attempt in January 2017. (Photo: Courtesy of JAXA)
TOKYO -- A number of Japanese companies have been trying, so far unsuccessfully, to get commercial launches of small rockets off the ground. But they have not given up.