Osoi hito

When this movie started and it was clear that Sumida-san was the lonesome man that ends in a killer rampage it looked like it would display disabled people like crazy idiots, but it does not. More its about the frustration (sexual and other) and loneliness felt by not being able to do what others around him can. He has the best possible friends/people to attend to him. This doesn't help as his demons are building inside of him.