There's no ice cream truck here in Gunma machi, but we can do ya one better. Every evening when you hear the mournful wail echoing off the surrounding houses, it's time for the yaki imo truck.
Imo is a Japanese sweet potato and the Yaki Imo Guy bakes them in the back of his moving truck in a real wood oven. He sells them for 200 yen a pop, which sounds kind of expensive and ridiculous, but ovens are extremely rare in Japanese homes so eating something baked is quite the rare treat. Still, I've never seen a group of kids chasing him down the street.