The term ""Japanese Dance"" refers to a great variety of different kinds of dance. There are two probable reasons. First, in Japan it was unusual that one style of performing art should be replaced by new ones. It was more likely that the old and new co-exist, and that they easily influence each other. In such a situation the boundaries between them can sometimes remain undefined. New styles constantly branch out from the preceding ones creating a huge number of new forms of expressions. Secondly,since Japan is an island situated on the eastern extremity of the Eurasian continent, it has been the terminus of a track of influence from many countries and have therefore been preserved. Over a long period of time, imported dance has slowly changed and adapted to the Japanese environment. "