Japanese festival food: popcorn

Of all the festival food in Japan, the one I see least is actually popcorn. The pictured popcorn stand was the first time in a long time that I had seen popcorn at a festival. This one is unusual in that the popcorn machine was outside a food truck, rather than in a festival stall like the other ones I have seen in the past. But I don't have photos of a popcorn festival stand handy, so I have used the most recent photo I have.

This popcorn stand was at a festival in a park in May. I bought some due to the pure novelty of it. It cost 300 yen for a large cup of popcorn. Most often I see popcorn made in a machine, like the one pictured, at the cinema. Which I dare say is the most popular place for popcorn in Japan. There are also popcorn specialty shops that either have a permanent branch shop or a traveling 'pop up' shop. An example of the latter is Jerry's Popcorn, headquartered in Tokyo, which often has pop up shops or stands at events or in shopping malls.

Have you ever seen a popcorn stand / festival stall or food truck at a festival in Japan?