I've recently been bought the second Japanese Shimizu box set, which includes Four Seasons of the Children. I'll let you know how I get on, but I'm sure it's more than worthy of inclusion.
Excellent list. Maybe Forbidden Games could be included too, just about to watch it again.
That's one of my first round choices for the World Cup, so there's no excuse for it to have been forgotten. Saying that, although it's one of the great childhood films, I'm not totally convinced by the individual performances. Especially the crying.