Amazing game, I liked a lot the different puzzles.
Maybe doesn't helps that much learning kanji or maybe since those were common kanji since the player is paying more attention to what every character does that what it means.
For example 水 grows flowers and 雨 grows flowers more, so the player stops thinking "water" and "rain", but instead "grow+1" and "grow+3".
But still I liked a lot the concept of the game.