Yes, the JASDF were there and gave a good presentation on their KC-767J which they have now declared to be operational. But it's boom-only and works mainly with the F-15J and F-2.
The Italians hope to receive 2 of their much-delayed KC-767Is this year. Bearing in mind that the Italian aircraft is only a 767-200ER with pods and boom, the fact that it will be over 5 years late doesn't bode well for the development risks associated with the KC-767NoGo....