Hard to tell, is he smallish and has short legs? Is his comb a funky rose comb?
Kind of tempted to toss in the idea of Japanese- Rosecomb bantam cross/mix... he has a very long and very full tail- imagine the long tail of Japanese and Rosecomb would produce that, especially if his comb is a rose comb.
Alternatively, if his legs really are short, maybe Japanese crossed with American Game. Would rule this out if his comb is a rose comb though....
Seems to be a beautiful and unusual bird.