From the album "Kiss & Ride." One of my favorite tracks on one of my favorite albums from 2008. This album also contains "The Sweetest Time," which was used as the opening theme to the Wii game "Rune Factory: Frontier."
I heard this song around the same time I started reading the Billy Chaka books by Isaac Adamson, and also learned that there's a movie in development based on the first book in that series, "Tokyo Suckerpunch," starring Tobey Maguire and Reese Witherspoon... and for some reason, I just really associate this song with Tokyo Suckerpunch. If ever the movie is completed, I really think Nakatsuka Takeshi needs to be featured in the soundtrack somewhere. Songs like this would fit in with the atmosphere and setting of the story PERFECTLY.
If you like what you hear, I highly recommend purchasing this album. It's available from the following reputable online retailers:
http://www.play-asia.com/paOS-13-71-9y-77-1-49-en-15-nakatsuka-70-2tu8.html
http://www.cdjapan.co.jp/detailview.html?KEY=UPCH-1617
http://www.amazon.co.jp/Kiss-Ride-%E4%B8%AD%E5%A1%9A%E6%AD%A6/dp/B001B56IYU/ref=sr_1_1?ie=UTF8&s=music&qid=1267409438&sr=8-1
Enjoy!