The Satsuma Biwa is a type of Japanese fretted lute. The Biwa is often the chosen instrument in the Buddhist religion. It’s black and only has four strings on it with the tuners on its bent headstock. It looks like it has gold strings with a gold saddle and very beautifully painted bridge and body. The painting on it has rounded lines though the instrument it’s has some jagged ends. I would say that the instrument is composed of many geometric shapes. Although the majority of the instrument is black the painting on it has four main colors that I see, Red, Orange, Brown, and green. The body of the instrument appears to be smooth, but the other parts to it are not. It has the principle of design since of course it is, or at least at one point was a functioning instrument and I do feel like there is unity in this.