Generally speaking if the teams were in Japan for Leg 11, they must of speant several legs in other nearby asian countries, which is why people haven't heard or seen anything as of yet. If teams wern't in China, they likely went to somewhere like Cambodia, Laos? Indonesia? Singapore? Taiwan? The general direction of this race seems to be in a right ----> direction accross the map, especially since they were spotted in Hawaii. Somewhere like South Korea wouldn't surprise me either as a leg destination.
By the way, no evidence to back this up, but I think leg 10 was probably a Japan leg too, especially as the place is expensive to film in, they'd likely want to get as much out of being in Japan as possible.
I think probably
Leg 10 - Unknown Asian country to Japan
Leg 11 - Japan
Leg 12 - Japan - > Hawaii - > United States(mainland)
In my opinion.
This race didn't finish in Hawaii did it?