Resources for autistic children?

Hey Kansai pals. This is a big ask I know for Japan since Autism is largely ignored. I have family that has a child with autism and they've had trouble finding help in Arashiyama and Kyoto. No luck at the city office neither. I know Kanto has a little bit of resources.
Does anyone here know of resources, schools, etc that are available for autistic children? Or any Kansai advice.
Thank you!