OKA CORPORATION BHD. (519941-H) Subsidiary Companies: OKA Concrete Industries Sdn. Bhd. (67634-M) OKA Engineering and Trading Sdn. Bhd. (329917-W) OKA Readymixed Concrete Sdn. Bhd. (329980-T) Real Charisma Sdn. Bhd. (442658-D) Pembinaan Cahaya Emas Sdn. Bhd. (601222-W)