Soul Calibur 5: Natsu Combo Video 

7 = Back Up
8 = Up
9 = Forward Up
4 = Back
5 = Neutral
6 = Forward
1 = Down Back
2 = Down
3 = Forward Down
CH -- must be counter hit
AC -- can be air controlled out of
* - Can be Ukemi out of
Music: Unfinished - Accel World OST