By coincidence, I was in Japan when this film came out - late 2016 - and I remember seeing its poster absolutely everywhere. Later (quite a bit later) I learned what a huge hit it had been: highest grossing film in Japan that year and fourth highest of all time, and highest grossing Japanese film worldwide of all time. And now that I've seen it, I understand why - it's a wistful, romantic, gorgeously animated movie whose premise satisfyingly accounts for the common (especially among the young) feeling of being in search of something that can't be named, and whose ending I wasn't sure it was going to reach, causing it to land all the more effectively.
