Products include network call trace, service assurance, customer experience management, microwave, radio frequency (RF), and optical signal generators, spectrum analyzers, and network analyzers. It was formed with the merger of two companies, the Annaka Corporation and Kyoritsu Electric in Japan in 1931. In 1990, Anritsu acquired Wiltron Company in the United States. Net sales in FY2008 were ¥84 billion (US$782 million). It has been listed on the Tokyo Stock Exchange since 1961 (TYO: 6754). As of 2009, it employed 3,700 employees in 20 countries.