OKA Corp. Bhd. is an investment holding company, which engages in the manufacture and sale of pre-cast concrete products and ready-mixed concrete. Its products include concrete pipes, arch bridge system, caisson, large diameter pipe, manholes, jacking pipes, box culverts, concrete porous subsoil pipes, concrete septic tanks, precast manhole components, and reinforced and prestressed concrete septic tank. The company was founded in 1981 and is headquartered in Ipoh, Malaysia.