In comparison to white rice, more water is used to cook brown rice. The amount of water required will depend on the cooking equipment used, such as a rice cooker, donabe (earthenware) pot or pressure cooker.  
To wash and rinse, gently rub the rice grains together with your hands, and change the water a total of three times.  Also, soak the rice for up to 6 hours prior to cooking, and once cooked leave the lid on to steam a further 10 minutes.