Okinawa ballad, Screaming "iyasasa (いやささ)" What does Japanese mean?

The mention of Okinawa, Japan (Okinawa) has also traveled more than three times, drilled a lot of rare places, but also heard a lot of Japanese words, but some words always sound particularly pleasant, such as in Okinawa traditional dance performances and Okinawa folk songs (such as three-line flowers, Islanders ぬ treasure) often can be heard. " Iyasasa (いやささ) "gives people a comfortable sense of hearing.