Setsubun is celebrated on February 3rd.
It’s supposed to be the start of Spring
(even though February is usually the coldest month of the year)
節分/Setsubun literally means “season division”.
Spring Setsubun was previously thought of as a sort of New Year’s Eve.
The tradition on this day was to cleanse away all the evil of the former year and drive away evil spirits for the year to come.
This special ritual is called mamemaki/豆撒き and is still done today.
The dad usually puts on the oni/demon mask and everyone throws dried beans at him to drive evil away.
Just look above if you live in an apartment building in case someone is “cleansing evil spirits” and you get rained on with beans.