There are 16casinos in Korea and there are many casino customers from various countries such as Japan, China and East-South Asia. But the main countries that produce most of customers in Korea casino are Japan and China. So, the study objects of this paper are limited within customers from Japan and China. There are two main purposes that I want to confirm through this paper. The first thing is to make sure if customer`s consideration factors when customer chooses a casino and if customer`s preference game differ, according to nationality. And the second thing is to make sure if customer`s consideration factors when customer chooses a casino and if customer`s preference game differ, according to age. I hope that it can supply a theoretical basis required so that a casino carries out different and various marketings to customers from nations with different cultural backgrounds and to customers of various generation.