Seven Lucky Gods Motif 

In ancient Japan, it was believed that happiness would come from a foreign land beyond the sea. It is also said that a story spread around the Edo period (c. 1603-1867) that if you sleep with a picture of the Seven Lucky Gods on a treasure boat under your pillow on New Year's Day, the second day of the New Year, or Setsubun night, you will have a good first dream.