Feature Length?

People have in Japan. There is no word on an international release schedule. If it's like most Ghibli films (which I understand this is not a Ghibli film...) it'll take a few months for a distribution company to agree on distribution timing, locations, etc. and then a few weeks later they will set a date and start marketing (minimally) for it.

Best advise is to monitor past American distributors for the film maker/film company, and follow them on facebook/twitter/website/blog and they'll probably post sometime in December a DVD release or select-screen showings (very unlikely to get a wide screen release)

Hope that helps.

(note: it is entirely possible that tomorrow some PR guy comes out, gives a release date, and it starts screening everywhere in America next month.... it's just not the norm)