No, it's not another training game. Kotoba no Puzzle Mojipittan (Word Puzzle Mojipittan) is a Scrabble-style board game from BandaiNamco in which players use characters from the Japanese hiragana syllabary to spell words. Therefore, it's really, really, really hard to play if you don't know a load of Japanese words, and basically impossible if you can't read hiragana.
Mojipittan has appeared on otherplatformsbefore, but as the Shockwave demo says, "The stylus makes it simple!" We suggest giving the demo a shot and seeing if you're up for some wordplay. The bouncy music and adorable tile mascots may convince you to enroll in Japanese classes.