Sakon-Mitsunari Chibi Sig

This is just a basic sig that I made using an artwork that I found through a friend....uhh, thats where im wondering...im not sure whose artwork it was that I used...if the person who did the original artwork sees this...please let me know, so I can act accordingly.

But yeah...I saw this artwork, and I just instantly fell in love with it...I just knew that I had to make a signature with it, and so I did