If you want to trace the origins of all this legume-throwing, this is where to start: Sensoji was the first place in Japan to hold a large-scale Setsubun ceremony, bringing mass-market appeal to a ritual that had been practised since the Heian era. Around 10,000 people turn up each year to watch celebrities lob handfuls of soybeans from morning to afternoon.
Beans are usually thrown to cleanse the evil spirits away, but since there are no demons within the temple grounds, people chant to invite good fortune instead. In addition, there will also be a ‘Dance of the Seven Lucky Gods’ called Fukuju-no-mai, plus bean-throwing by Asakusa entertainers to welcome visitors.