The setup of Blue Giant is familiar anime territory: a young boy from a small town moves to Tokyo to pursue his dream. This boy, Dai, is a saxophone obsessive. He practices all day under a bridge, honking and warbling until he wears out his reed. Naturally, Dai wants to be the greatest jazz musician in the world.
For all his audacious ambition, Blue Giant is largely restrained. The movie focuses on the trio that forms the band — and even…