SoftBank has announced that it has set up a new 5G service in Japan. It is based on mmWave technology as opposed to sub-6GHz, which, according to its owner, brings the potential for higher speeds at reduced costs for carriers. The new system is made using Qualcomm hardware, and will support phones with the same OEM's SoCs.
https://www.notebookcheck.net/SoftBank-s-new-Japanese-mmWave-5G-service-is-driven-by-Qualcomm.528517.0.html