In shamisen, there is a mechanism to put out the peculiar sound that is called "SAWARI". This mechanism is the feature one in musical instruments all over the world. However, there are still a lot of uncertain points of the mechanism. In this research, it is aimed to clarify the feature of the shamisen sound by "SAWARI", and to improve the shamisen sound assumed to be an ideal. As the first step, the following was done to examine the influence that each element of the shamisen exerted on the sound, recording and analysis of "SAWARI" sound, experimental modal analysis of shamisen and simulation of bowstring vibration.
