I'm a street food fan.

Years ago, in Japan, I ate Corn on the Cob from Japanese vendors who
cooked them on hibachis.

They would dip each ear in a thin sauce before presenting it to the
customer.

What was this sauce made of? It included, but was not limited to soy.

If region is important to determine recipe; it was in Aomori
Prefecture (Ken) in the town of Misawa.