IS THIS JAPANESE?

I went back to the Japanese Festival at the botanical garden yesterday. The weather was better but it was impossibly crowded; I lasted two hours before I had enough. At one point I sat on a bench, picked up the camera with the telephoto and tried to take sniper shots. This one worked. Is her costume based on an anime character? That's beyond my experience even though I've been to Japan a few times and have plans to return.