Abstract
In precedent studies in the U.S., an increase in the level of copyright protection has negative effects, such as the increase in the price of works and in the "cost of expression". However, in the U.S. and Japan, the same argument is not true because of the differences in law and industrial structure. This paper shows that the argument that the copyright protection increase certainly leads to negative consequences is not suitable for the music and recording industry of Japan based on the analysis model of Landes and Posner.