In Okinawa, new wooden house construction starts is very small compared with in the whole Japan. So, wooden house builders in Okinawa have many difficulties, like shortage of lumbers or carpenters. But, from the 1990s, pre-cut lumber shipped from southern Kyushu area have got used in Okinawa. With this new building method, some companies which have no experience of wooden construction moved onto wooden house construction. Most of them build small numbers of wooden houses, and do another business on the other hand. And wooden house building system is influenced by limited distribution channel as well as environmental factor.