One recent Sunday, 7-year-old Yukito Takanashi of Tokyo was dribbling a soccer ball on a makeshift field. At one point, he put on an eye mask, just like blind soccer players. But he took it off after a while, feeling somewhat uncomfortable. The boy, who has experience playing the game with other children who, like himself, have autism, said it was "difficult" to play with his eyes covered. "It's a good chance to learn about the struggles people with disabilities go through that most people fail to notice in their daily lives," Takanashi's father, Ryoichi, 32, said.