Looks like Makoto Shinkai.

Whoever drew this is much better than Shinkai, I think. This doesn't have any sort of smooth CG effect like his work, either.

this is a work by Akihito Tsukushi, the degree of detail in his works are incredible, personally i think his pencil works are even better.

post #50549 even higher res.

artists site. http://www2.ocn.ne.jp/%7Esigeya/pupa/

Even though I'm not familiar(yet) with his work, I really agree with what Anon said. Just from what I have seen from Tsukushi, (5 or 6 drawings so far) he is very meticulous when it comes to detail. I imagine he tries not to focus too much on one thing, and rather pays equal attention to the whole piece, giving it an overall even look.