Somewhat ambivalent
I think that it's going to take a while for me to get to the level of Japanese where I can properly utilise it. To me it looks like a pretty standard sort of logic puzzle game somewhat akin to crosswords and sudoku with arbitrary testing/marking thrown in to complicate things... and a creepy floating head.

No wonder it's a hit in Japan
This is addictive, even though I'm guessing what to do most of the time. I'm attempting to learn Japanese, but currently only the language, not the symbols, so some of the game is impossible.

Really good though. I bought it after seeing it played on Famitsu Wave DVD (Oct 2005), and knew I had to get it, no matter what. It really is a laugh.

Righteously Awesome
Sure, this game is pretty inaccessible to the non-japanese speaker, but it has two things going for it:

1 - Just look at the professor's polygonized head. Games simply don't look any cooler than this.
2 - Enhanced Draw-a-Koala Gameplay.

This game is just so odd by Western standards, it's great fun to show off to friends.

Definitely not import-friendly.
Looks very interesting, train every day to increase your brain power! Makes great use of the touch screen, microphone; really a variety of exercises. I'm enjoying it with a beginner's level of Japanese; but more would probably help, as it is made for Japanese adults. Even the math section requires at least knowledge of kanji for various colors.

this game rox