Hishi-mochi is a traditional Japanese rice cake shaped like a diamond, typically enjoyed during the Hinamatsuri or Doll Festival, celebrated on March 3rd. It consists of three layers, each made from glutinous rice flour and colored pink, white, and green. The colors symbolize the beauty of spring, purity, and the growth of new life. The pink layer represents the peach blossoms, while the white layer signifies purity, and the green layer symbolizes the growth of grass. Hishi-mochi is often displayed alongside Hina dolls and is a festive treat that reflects the cultural significance of the festival.