You have until August 13 (Okinawa time) to submit your theme song for the Worldwide Uchinānchu Festival next year. Visit their website’s page for the contest guidelines but one that stood out is that the theme song must have lyrics in Japanese so sadly no instrumentals. Here are the theme song contest details:
In order to welcome Uchinānchu from around the world who will be participating in the festival, we are looking for a theme song that will enliven the festival pre-events and events promoting exchange with the citizens of Okinawa Prefecture.
Please submit a theme song that will fit perfectly with the Worldwide Uchinānchu Festival.
・The length of the song should be no longer than five minutes, the lyrics should be in Japanese, and should not exceed three verses.
・The theme song should be one that makes listeners imagine the Worldwide Uchinānchu Festival and the charm of Okinawa.
https://wuf2022.com/en/topics/948
The prize for the winning theme song is a certificate and 300,000 yen (currently around US $2,700).