Setsubun is one of Japanese's traditional events.

 It is hold in the last day of winter. 

 They scatter roasted beans in his or her home.

 And they wish that happiness will come and evil spirures will leave.

 This is called 'Oni'.

 After this event , we pick up some  beans scattered.

 And we eat them as much  as his or her age.

  But if the beans are raw, you do not eat them :)