It's just an ordinary private home, but caricatures of Chiharu when young and now are put up. By the way, if you navigate with Google Maps, you'll be taken to the house used for filming a movie, so search by the address.

Came on a motorcycle tour and happened to run into Chiharu's mother, who was out for a walk.

There was an older man who's the caretaker.

I'm a fan!