Sorry English only ^-^ This is from Naruto right?

Kage means "shadow," that is easy enough.

Bunshin, in the ninja usage, is when a ninja divides into a number of clones / images of himself and they all attack together. I called these "divisions" here just to keep it short, but something more flashy such as "Technique of the Multiple Shadow Images" or whatever might suit the material better.

Jutsu is "technique," "art" may also sound quite cool here.

With anime terms, you are often better off first working out what it means, and then finding something that sounds as cool in your target language rather than a literal translation, which often just sounds dry. If this is just out of personal interest, then I hope this helped ^-^