As an update, these properties are currently available during the Olympics
Sheraton Grande Tokyo Bay - $780 nightly
Courtyard Tokyo Station - $590 nightly
No points redemption available
First trip to Tokyo. The SG looks isolated if you won't be going to Disneyland. While the CY seems well known for it's tiny rooms.
Holding out hope for availability at mesm AC or the new Aloft Ginza also opening soon