Anritsu Corporation (アンリツ株式会社, Anritsu Kabushiki-gaisha^?) is a Japanese corporation that is in the test and measurement market. Products include microwave, RF, and optical signal generators (sources), 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 was 84 billion yen. It has been listed on the Tokyo Stock Exchange since 1961 (TYO: 6754). As of 2009, it employed 3700 employees in 20 countries.

Anritsu Company is the American subsidiary of Anritsu Corporation, a provider of communications test and measurement solutions for more than 110 years.^{[citation needed]} Anritsu provides solutions for existing and next-generation wired and wireless communication systems and operators. Anritsu products include wireless, optical, microwave/RF, and digital instruments as well as operations support systems for R&D, manufacturing, installation, and maintenance. Anritsu also provides precision microwave/RF components, optical devices, and high-speed electrical devices for communication products and systems. With offices throughout the world, Anritsu sells in over 90 countries with approximately 4,000 employees.^{[citation needed]}