WILLCOM Inc. (株式会社ウィルコム, Kabushiki-gaisha Wirukomu) was a Japanese PHS operator, offering flat-rate wireless network data transmission and flat-rate voice calls for its subscribers, until 2014 when it merged with eAccess to form Y!Mobile.The company was formerly known as DDI Pocket, a subsidiary of KDDI. In 2004, the Carlyle Group acquired a majority stake from KDDI and changed the name of the company in February 2005. In 2010 SoftBank purchased 100% of the company.