Hanagasa Ondo (花笠音頭, flower straw-hat song) is a folk song from Yamagata Prefecture, Japan.^[1] It accompanies a local community dance called the "Hanagasa Odori (花笠踊り).^[2]

The song is in typical swung ondo rhythm, and features a kakegoe found in no other song; "Ha Yassho Makkasho!" The dance is performed with a simple straw hat decorated with synthetic flowers. It is usually performed by women, but men can also join in. The dance movements are different for each gender.

Hanagasa Ondo plays when the lid of the Gyukakuni ekiben is lifted.