Improvised Music from Japan is a website and record label. The website was originally known as Japanese Free Improvisers. As its name suggests, it concentrates on Japanese and Japan-based improvisers, particularly free improvisers. In December 2001, a compilation box-set, also called Improvised Music from Japan, was released to mark the fifth anniversary of the website. It was a 10 CD collection of previously unissued material from a variety of Japanese musicians (some of them collaborating with Europeans and Americans). The artists featured on the release are: