Anritsu Corporation (????????, Anritsu Kabushiki-gaisha?) is a Japanese multinational corporation in the telecommunications electronics equipment market. A global pioneer for producing the worlds first wireless telephone network, Anritsus revenue numbers near US$782 million. In Japan, Anritsus first predecessor, Sekisan-sha, was founded in 1895. Annaka Electric Company followed, producing wireless transmitters and the worlds first wireless telephone service and Japans first automatic public telephone. 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.