March 3rd is girl's day in Japan.
We call it "Hinamatsuri" or "Momo no sekku".
It is an event to celebrate in hope of growth of girl in healthy.
On that day families who have girl set dolls called "hina ningyo" in their house.
Those dolls are in court dress of the heian era.
In the photo above, Emperor and Empress are on the top platform.
Three attendant ladies are on the second platform.