Yukka nu hii (Okinawan: 四日ぬ日 or 四日の日, Yukka nu hii, - lit “the fourth day”)is an annual festival of the Okinawa Islands of southwestern Japan, which is traditionally celebrated on the 4th day of the 5th month of the lunisolar calendar.
The festival centers on the traditional dragon boat (haarii, or haaree in Itoman) races.
The dragon boat races are a form of giving thanks to the sea and agricultural gods and asking for their continued help for the future.
Like many other elements that characterize modern Okinawan culture, yukka nu hii used to have a limited geographic distribution.
[4] Since the Meiji period, many Itoman fishermen have migrated to other parts of Okinawa Prefecture, with their haaree races.