Claiming to be the world’s only vendor currently providing interoperable G.fast and VDSL technology, Nokia has landed a huge deal at second-placed Japanese mobile network operator KDDI – upgrading MDUs (multi-dwelling units) to speeds of 830 Mbps. At a time when Japan is caught in a fight with Korea and China to be first to 5G, aiming to deliver the next-gen mobile network by the Japan 2020 Summer Olympics, some significant broadband news makes for refreshing reading. The announcement notes that Japan-specific VDSL2 technology is relied upon by between 5 million and 6 million residents, those who require network upgrades, while over 30 million households receive FTTH/FTTB services, of which approximately 9 million are MDU residents. But as fiber picks…