I love corn, so I was excited to run into a corn option at a Japanese vending machine. Out came a beverage container of hot corn soup or something that I would not buy again, but interesting experience.
I had hot corn soup, red bean soup, and asari clam miso soup from vending machines in Japan during my trip there this month, and they were all fantastic.
We had hot corn soup/drink from a couple vending machines in Hokkaido in the winter. I thought it worked well on a cold day, who knows, maybe it was the novelty!