I believe Japan has the most advanced AI for the domestic market but China, Russia and the US and perhaps the UK hold extremely advanced Ai for their space programmes.
Most attention is given to robots such as the one that can read human emotions, but is that the most advanced application? We do not know how skillful the operations necessary and made possible by AI within complex machines.
It is difficult to make these comparisons so popular opinion is affected by what can be easily understood and wondered at, such as robots who behave like humans and cars that drive themselves.