It's RYU-ken......sheesh..... :-(
In japanese, Ryu means 'dragon' and ken literally means 'fist'. No, Te means 'hand'. There is a difference.
So, he's basically saying 'dragon fist'.
Think about it....Ry- U- Ken. :-?
Jeez, and I only learned chinese. :-D
Oh, if anyone was wondering, Asuken is 'energy fist'.