Alsø alsø: “mutton-fat jade” (aka nephrite), and jade in general, is really more of a China thing. You don’t see much of it in Japan. In fact, googling “mutton-fat jade japan” brings up the Chinese jade wiki article (once you pass the few art-related auctions & forum questions at the top), which includes the following…

Also this: “While day students, wizarding children are flown back and forth to their homes every day on the backs of a flock of giant storm petrels.”

“Mahoutokoro (Mah-hoot-o-koh-ro, according to the site, but which is apparently correctly pronounced mah-HOE-toe-KO-ro)”