Koreeda is autistic! Well, I'm not sure if he actually is, but it would make a lot of sense, actually. Inability to focus, susceptibility to emotional outbursts/overload, incredible ability to focus on singular tasks of interest, struggling to understand the emotions of others, dislikes change and prefers routine (such as his recurrent need to "go back to" problem solving)... that's interesting. I don't think I've ever seen a manga with an autistic (if he is one) protagonist