Many Japanese films for kids are entries in venerable anime series belonging to multiplatform franchises. To their target audience they are pre-sold and, in their formulas, pre-seen. And that audience is by and large domestic. One big exception is "Stand By Me Doraemon," a 3-D CG anime starring a blue robot cat and his boy companion. After the film's 2014 success in Japan, it made an astounding $87 million in China, a territory considered all-but-closed to Japanese films.