During the Showa period or before, pictures of people collecting falling leaves on the road or the garden during the winter season, and of putting sweet potatoes inside the leaves when burning them on the bonfire, were considered scenes which speak for winter, and ishiyaki imo is a season word to describe winter.
昭和やそれ以前の時代において、冬の時期に道路や庭に積った葉落葉を集め、焚き火として燃やす際に、一緒にサツマイモを入れて焼く光景は、冬を物語るものとして扱われ、冬を表す季語ともなっている。