Providing an adequate housing facilities for the evergrowing urban population is a serious problem. Such problem is easily understood. but has not been succesfully dealth by Indonesian government. as it is purely as a housing problem. https://www.roneverhart.com/Traditional-Karate-Do-Okinawa-Goju-Ryu-Book-1-The-Fundamental-Techniques-by-Morio-Higaonna-Preowned/