Informant: If you lose your upper teeth you have to throw it.. bury on the ground.. in the ground.. and if you lose your lower teeth you have to throw it on the roof and this is because.. its a wish for growing your next teeth.. growing straight up.. that’s it.
Collector: did you do this as a kid?
My friend Junsuke who was born and raised in Himeji Japan, told me this story one night that we had been drinking a tad. In comparison to many cultures i have noticed that there are many things that come with teeth. a ritual of sorts and a wish or treat. this may be universal or just widely spread because all humans lose their teeth as kids.