A rainbow-like light falls on Taiko performers during an Ume Matsuri (Plum Tree Blossom Festival) in Tokyo, Japan. It was a clear and dry day and I was shooting southwest in the afternoon, so none of that explains the light. However, a group of ladies from the shrine was preparing vegetable miso soup over traditional open coal fires (which we got to eat after the ceremonies!). There was a lot of smoke no more than 20 feet from where I was. I think some errant smoke might have caused the rainbow.

Nikon D3300