"Faster Internet" is really a last mile problem the core network is plenty fast. To give you an idea, you can fit well over 100, 10 Gbps channels on a single fiber; and I think that the current long-haul speed record over a single fiber is over 1 Tbps. A fiber bundle will typically contain several hundreds of fibers, so as you can see there is plenty of backbone bandwidth available.
As I said, this is principally a last-mile problem so population-dense areas like Taiwan, South Korea, and Tokyo will always be more profitable for a rollout of new technology.