Japan’s second largest mobile operator KDDI has announced it is closing down its Tu-Ka cellular service in March next year. KDDI acquired the three Tu-Ka Group companies in October 2005 and has been steadily migrating users to its ‘au’ service by allowing Tu-Ka users to keep their old number and e-mail address. The Tu-Ka service providers have enjoyed a long career due to the simplicity and ease of use of their services, which have been highly regarded by customers. Tu-Ka Phone Kansai launched in April 1994, followed by Tu-Ka Cellular Tokyo in June the same year, and Tu-Ka Cellular Tokai in July 1994. In June 2006 however, KDDI stopped accepting new subscriptions for the service, and the sale of upgraded handsets will cease on 31 December.