Well pre-supposing that Tokyo is Leg 11, that leaves a lot of US cities for the finale. All these cities have direct nonstop flights from Tokyo (Narita-NRT). The number after a city is the number of flights to that city/airport. Cities that are bolded, have not hosted a start or a finish.
Atlanta, Ga
Boston, Ma-2
Chicago, IL-4
Dallas, Tx-2
Denver, Co
Detroit, Mi
Honolulu, Hi-9
Houston, Tx
Los Angeles, Ca - 8
Minneapolis, Mn
New York (JFK)-4
Newark, Nj
Portland, Or
San Diego, Ca
San Francisco, Ca-4
San Jose, Ca
Seattle, Wa-3
Washington, DC-2
There are a few flights from Tokyo's other airport to the US.....Haneda HND
Honolulu, Hi -3
Los Angeles, Ca -2
San Francisco, Ca
Seattle, Wa