Oita prefecture is said to have the highest per capita chicken consumption in Japan. Especially in the northern part of the prefecture centered on Usa City, there are many chicken fried chicken specialty stores, and if you include butcher shops and side dish shops, there are quite a few.
Most of Usa's karaage is made by soaking chicken in a sauce based on soy sauce, garlic, ginger, etc., and then deep-fried it, and each store has its own secret original sauce.
The origin of the fried chicken specialty store is in the Chinese restaurant ""Rairaiten"" in Yokkaichi, Usa City.