The NUGW acts as an umbrella organization encompassing roughly 40 autonomous general unions and trade unions, including the National Union of General Workers Tokyo Nambu (often referred to as simply Nambu), a union which represents workers in southern Tokyo and Eastern Japan; the National Union of General Workers, Tokyo (also known as Tokyo Union), which represents parts of Tokyo and Saitama Prefecture, the General Union, headquartered in Osaka, representing Western Japan, the Fukuoka General Union, representing Ky sh , and the University Teachers' Union.