For those that don't know, shinkai makoto does the whole animation alone (or did, as far as I know), creating things that look as incredible as this. His
other movies are also just as beautiful. (Also talking from actually comparing the stuff to real life, his stuff may be the most "realistic" looking animes out there, in the sense of details in the background, showing off the real "feel" of Japan.)
I've noticed this new film, but not had a chance to really check any of it out yet. Although that link I just linked to above seems to show more stuff after byousoku 5cm besides this too
How time flies.