, was a Japanese company which operated the post office of Japan. It was part of the Japan Post Holdings group. History October 1, 2007 - Operations commenced with the break-up and privatization of former Japan Post operating divisions. October 1, 2012 - Merged with Japan Post Service to form Japan Post Co., Ltd. See also Post office - In Japan, Post office is called 郵便局, which is the same name of Japan Post Network. Japan postal mark Japan Post Holdings - a holding company of Japan Post Group. External links Japan Post Network Japan Post Network Service companies based in Tokyo Japan Post Holdings Privately held companies of Japan Japanese companies established in 2007 2012 disestablishments in Japan