http://www.oishiimati-oita.jp/
This is a sightseeing information site dealing with the many attractions of Oita City.
http://en.visit-oita.jp/
This is Oita Prefecture's official sightseeing information site.
http://www.jnto.go.jp/
This is a sightseeing information site run by the Japanese government's tourism bureau.
https://www.city.oita.oita.jp/foreignlanguage/index.html
The official Oita City website is open to the public in English, Chinese (Simplified and Traditional), Korean, French, and Spanish.