[AntonyJ]

Am staying at the Hilton Tokyo Bay in just under 3 weeks time - we booked them first of all via (I think) hotels.com that allowed us to cancel at any time, but then kept eye open for the regular flash sales Hilton have, and then nabbed same room with the lower price, then cancelled the hotels.com one.

If you find places you are OK with price with now, then (after checking have got right site! ) book several different ones, then keep checking as gets closer to travel and then cancel ones not wanted - the price might go down even.