Hello,
Have you ever heard "Ishiyaki Imo" ?
Ishiyaki Imo is a stone-roasted sweet potato. Imo = Potate !
This potato isin season during fall. You can find it at Donkihote or any supermarkets in Japan.
I introduced some wired Ishiyaki Imo culture in Japan.
I hope you will like this story.
Best,
Kaichi