I would like to know which anime this is- (Please refer attached picture below) )
I am not sure whether this is right or not, but I believe that this is probably Sora Suiga, as I mentioned in the comments sections. I think this is a Vocaloid that was developed by the company Ameya/Ayame (Utau is only the name of the program sorry). From Wikipedia, it appears that Ameya/Ayame specialises in Japanese singing synthesizers, per the idea that I got that this is probably a Vocaloid.
He also has a female counterpart called Sara Suiga. After some reading, I think you can use these voices possibly for free but only works for Japanese language only.