Its name literally just means "fried sugar" (sata = sugar, anda = oil, agi = fry), and for most of its roughly 500-year history it was too expensive for anyone but Ryukyu Kingdom royalty to eat regularly, since sugar itself was a luxury good in Okinawa until as recently as 1972.
A stiff, only lightly sweetened dough of flour, egg and sugar is rolled into a ball and deep-fried until one side splits open into a golden, tulip-like crack, producing a dense, slightly crisp doughnut hole eaten plain or in flavors like purple sweet potato and brown sugar.
Takoyaki (Octopus Balls)
Yakitori (Skewered Chicken)
Sapporo Miso Ramen