There is also a custom to eat chimaki and Kashiwamochi (a rice cake which contains bean jam and is wrapped in an oak leaf) on tango no sekku day, May 5, 2017.
This festival, on May 5, is now Children's Day but once it was set aside for only boys. May is also the month when irises come out. Its long, narrow leaves resemble the sharp blade of a sword, and it has been the custom to place iris leaves in a boy's bath to give him the martial sprit.
Besides flying carp streamers, the parents who have a boy in their family display warrior dolls with a miniature suit of armor and helmet on a tiered on this day, praying for the healthy growth of their boys.