This was not on the original Minja EP. It was being saved for the follow-up Ninja BBQ album.
The music for this started out as an attempt to write RPG boss battle music. Once I decided on a song about ninjas wailing on guitars, I asked John Mapes if he could play a small part I wrote on guitar, and to come up with a short solo for one small part. Instead of a short solo, he sent me him wailing for 3 minutes and 41 seconds straight and said "you can pick whatever you want out of this." and I managed to fill the entire song with his guitar-playing, and the song would never have been anywhere near as awesome if I'd gotten something more like I was actually expecting.