I went at Onna Village Public Office for the first time and I saw their building and I try to identify what kind of architecture is used in the design.
Based on my own observation and thinking it is a mixture of brutalism and a touch of Art Deco. It uses a massive design on stilts by doing a raw concrete finishes. On the side of the building it uses some geometric and linear patterns which I think a touch of Art Deco Style. This kind of buildings are those buildings that should be preserve. It may not be for the same purpose at the future but still the classic design of architecture remains.
Stilt design that uses raw concrete emphasizing brutalist style.
Structurally designed stairs.
Linear patterns on face of the building emphasizing Art Deco Style