The ONLY way I see this thing being huge in Japan is IF, and only IF:
1) Ni no Kuni supports it and makes the experience 10x better with Move than without, launches early 2011
2) Minna No Golf, Minna No Tennis, Minna No Baseball all launch before the end of 2011, with at least one hitting before the end of 2010, and are Move compatible and make the experience 10x better than with a DS3.
3) MH3G actually is surprisingly moved to PS3 like Ni no Kuni and supports Move in a major way like MHTri did with Wii
4) Inazuma Eleven break pulls a Ni no Kuni and goes PS3, exclusively or not, and supports Move in a major way
5) DQX also pulls a Ni no Kuni and gets moved to PS3, exclusively or not, and supports Move in a major way
6) NMH2, Child of Eden, Time Crisis, House of the Dead, and other niche motion controlled titles hit the console on a regular basis.
7) FFXIV and FFvXIII support Move in a major way to make the experience better
8) Gran Turismo 5 supports Move in a major way besides just head tracking - which doesn't require Move.
I see 1, 2, maybe 6, 7, 8 happening, but 3, 4, 5 ain't happening, so I don't think it'll be as huge as you think it'll be.