Dog Star (2002)

A seeing-eye dog (Shiro) is granted one wish by his former owner. He chooses to become a human for a short time so he can find the girl who trained him as a puppy. While attempting to get to know her (as he runs along behind her and sniffs for her around town) he eventually falls in love with her.
Takahisa Zeze
Etsushi Toyokawa, Haruka Igawa, Ryo Ishibashi, Shigeru Izumiya, Kanako Fukaura, Kimiko Yo, Kenjiro Tsuda, Yôko Kamon, Yuuki Ogoe, Hideo Sako, Shingo Ippongi, Yoji Tanaka, Takeshi Itō
tt0336300