DigiInfo TV publishes a video of a compact 8K camera and environment presented at NHK Open House days at the end of May:
One of the biggest NHK challenges is implementing the high speed video processing and delivering the broadcast traffic. Videonet article discusses a rapid adoption of PERSEUS codec developed by V-Nova, which possibly solves these problems. The London, UK-based startup V-Nova has been established in 2011, but came out of stealth mode in April 2015 "claiming that PERSEUS completely shifts the bit rate curve and makes it possible to deliver UHD in HD bit rates, HD in SD bit rates and SD in sub-audio bit rates."
V-Nova founders discuss the disruptive nature of their proprietary codec technology in this pre-launch Youtube video: