I recorded Koyama's Private Hearts solo from Shokura 2008.04.13..... but it's just the audio and the quality is really bad. (I literally recorded it from the TV.)
A clear version would probably come in a few days. ^_^
It's not the whole perf....it starts on the 1st chorus only.
The rap part *which is really good* somehow reminds me of Love Addiction and Snow Express. It's pretty similar to the concert version. XD