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WILLCOM (ウィルコム) is a Japanese PHS operator, which offers flat-rate wireless network and flat-rate mobile calling for it subscribers.

The company was formerly known as DDI Pocket, a unit of KDDI. In 2001, a popular flat-rate wireless network service was introduced. In 2004, the Carlyle Group acquired a majority stake from KDDI.

Summary

WILLCOM, Inc. is telecommunications enterprise performing a PHS business almost all over Japan, which share the first place of Japanese PHS market. It probably will be only one PHS operator in Japan, because other PHS operators have decided to withdraw the service.

There is WILLCOM Okinawa Co., Ltd. in a subsidiary. （WILLCOM is 80% investment）

It has renamed in February 2005 from "a DDI pocket".

Its subscriber exceeded 4 million on May 29, 2006 was announced. Press release in Japanese

Outline and process

See also #history below.

This company founded as planning-company in 1994, and offered telecom service in 1995 (DDI-Pocket). It has mainly built base stations of 500mW-radio output (and sensitivity), unlike other PHS operators, which had mainly built 20mW base stations.

The high output made up some radio interference and such trouble as impossibility of telephone call in the dense area like Shinjuku, Tokyo in early era. But such a trouble is not reported afterwards. On the other hand, high output (and sensitivity) can also earn wider coverage of area per base station, therefore made it able to expand the service areas faster.

However, there has been the competition issues against the cellular telephone, and until October 1996, it was not possible to make call between PHS and cellular telephone. Afterwards, it still remains as a higher charge because it needed to go through the gateway telephone exchange facility. (More afterwards, there has been no need to do that.)

PHS was firstly get popularity because of its lower phone charge, but cellular telephone also reduced the charge, which was too expensive from the beginning. So superiority of PHS had reduced and its smaller area coverage made them mind about.

Stock holders

In January 1, 2005

Carlyle Group 60%
Kyocera 30%
KDDI 10%

External links

Willcom

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 The high output made up some radio interference and such trouble as impossibility of telephone call in the dense area like Shinjuku, Tokyo in early era. But such a trouble is not reported afterwards. On the other hand, high output (and sensitivity) can also earn wider coverage of area per base station, therefore made it able to expand the service areas faster.
-However, there was the competition issues against the [[cellular telephone]], and until October 1996, it was not possible to make call between PHS and cellular telephone. Afterwards, it still remains as a higher charge because it needed to go through the gateway telephone exchange facility. (More afterwards, there has been no need to do that.)
+However, there has been the competition issues against the [[cellular telephone]], and until October 1996, it was not possible to make call between PHS and cellular telephone. Afterwards, it still remains as a higher charge because it needed to go through the gateway telephone exchange facility. (More afterwards, there has been no need to do that.)
 PHS was firstly get popularity because of its lower phone charge, but cellular telephone also reduced the charge, which was  too expensive from the beginning. So superiority of PHS had reduced and its smaller area coverage made them mind about.