If you're intent on getting an early run of Echochrome, then you may want to keep an eye out on the region's PlayStation Network. SCEJ has recently announced that they will be releasing a demo of this puzzle title for both the PSP and PlayStation 3 on March 6 (Thursday) next week. That's 13 days before the full game's release.
The Echochrome demo for the PSP is expected to be downloadable from Japan's PlayStation Spot locations, and the PlayStation Store (either PSP or PC). The demo's PlayStation 3 port will be available via the PlayStation Store.