Flower, Sun and Rain is an adventure/mistery game originally released on Japanese Playstation2 consoles in May 2001.
The game has been translated and re-released on Nintendo DS consoles worldwide; However, the port is substantially inferior in the graphics and music department, which I believe hinder the overall atmosphere of the game.
Suda has hinted at a possible remake/remaster coming later down the line. Meanwhile, you can either play the NDS version, or play the PS2 version while following along this script for the english version.