Japan's NTT says age of light to replace copper cable networks / Japan's NTT to open more India data centers in $1.5bn buildup / NTT's optical link allows remote karaoke duets with no delay / Japan plans bonds backed by NTT stake to aid Rapidus / Japan plans bonds backed by NTT stocks to aid Rapidus / Toyota, NTT plan US$3.27 billion outlay on mobility AI system for autonomous driving / Toyota and NTT to team on AI self-driving to prevent crashes / Toyota and NTT to collaborate on developing system for autonomous cars / NTT and Chunghwa Telecom launch all-optical link between Japan, Taiwan / NTT works to turn next-gen IOWN optical network into global standard