The company was founded as a planning-company in 1994, and started to offer telephony services in 1995 under the brand DDI-Pocket.

In 2004, the Carlyle Group acquired a majority stake from KDDI and spun off DDI Pocket in February 2005, with the new company called Willcom.

The high output level caused some radio interference and it was difficult to place calls in dense areas such as Shinjuku, Tokyo during the network's early days, although these problems were eventually solved.

PHS became popular because of its lower cost, causing cellular telephone companies to reduce their rates, which were initially considered too expensive.

With the competitive advantage of PHS reduced, DDI-Pocket went through difficult years at the end of the 1990s and the beginning of the 2000s.

[3] This took place after Willcom was unable to reschedule its debt payments; the company had been losing subscribers to competing networks with greater data speeds.

The company eAccess was established on November 1, 1999, by Dr Sachio Semmoto as an ADSL fixed line broadband provider.

As of April 17, 2009 EMOBILE introduced HSUPA to metropolitan areas claiming support for 5.8 Mbit/s.