Kitchen Maruyama
A Showa-era Western-style diner founded in 1963, one of the originating restaurants of Oita's tori-ten (fried chicken). Chicken marinated in a house-made tare, lightly battered and deep-fried in a large flat pan (no fryer), served with house-made ponzu and karashi mustard — the same method for 60+ years. Tori-ten set 850 yen including rice and miso soup. Google Maps 401 reviews, 4.0 rating. Lines form at lunch.
Google Maps 401 reviews, 4.0. TripAdvisor 31 reviews, 4.2 (ranked 6th in Oita City) — independently confirmed. Tabelog 330 reviews, 3.47. Many reviews on Retty too. Common themes: The tori-ten taste unchanged for 60+ years, The original tori-ten in Oita is here, Lunch always has a queue. Reviews center on local regulars, no PR elements detected. Consistent popularity despite limited opening days (closed Sun, Mon, holidays).