The best holiday for ludicrous food gimmicks is definitely Halloween (with St. Patrick's day in close second if for no other reason but green beer). People are free to throw fake blood, prosthetic fingers, edible eyeballs, and all sorts of zany, typically off-putting items right in your favorite snack.
The ryokan where I stayed isn’t far from the train station in Kyoto. You pass a cool bar marked by strips of fogged-over plastic in the doorway and arrive at this neat, quiet inn that locks up at midnight. The rooms have tatami mat floors and cotton yukata robes with blue and white stripes. I had taken the train from Nara.