Just as the boatman had cautioned, the morning's clear skies gave way to a thunderstorm by afternoon. Since then, Shibukawa noticed that the few days around nihyaku toka were always stormy, prompting him to mark the 210th day from risshun as an unlucky day on his calendar. M any farming communities developed festivals they hoped would keep the strong gusts on nihyaku toka from destroying their crop. The most famous of these is held in the town of Yatsuo in Toyama Prefecture, in central Japan near the Sea of Japan. Here, local residents dance nearly nonstop for three days and three nights starting on September 1 to invite the evil spirits that create strong winds to join the dancing and forget about causing mischief for a while.
Dancers try to keep the spirits busy.