NTT Communications Group to Join World IPv6 Day Trial

TOKYO, April 28, 2011 - NTT Communications (NTT Com) and its three subsidiaries of NTT Plala, NTT
PC Communications and NTT America jointly announced on April 28 that they
will participate in World IPv6 Day, a worldwide testing of the IPv6 protocol,
to demonstrate its readiness to ensure successful transition from the IPv4
environment.

Sponsored and organized by the Internet Society (ISOC) and major content
providers such as Google and Facebook, the event is a 24-hour testing of
public IPv6 deployment starting on June 8, 2011. Participants will enable
IPv6 on their main Websites for 24 hours, providing their Web content over
IPv6 while testing connections to isolate any possible issues that may affect
users in the IPv6 environment.

NTT Communications Group has been a leading contributor to the IPv6
deployment ever since the company helped the Internet Engineering Task Force
(IETF) to establish the IPv6 basic protocol in 1995, and participated in a
number of projects led by respective governments including the IPv6
Information Appliance Trial in Japan and 6NET hosted by the EU. NTT Com Group
is also noted for launching the world's first commercial IPv6 service in
2001, OCN IPv6 Tunnel Connection Service, in Japan.

Today, IPv6 technologies are deployed in various content delivery
services of NTT Com Group, including NTT Com's emergency earthquake news
flash and NTT Plala's Hikari-TV with 1.4 million subscribers. Overseas, NTT
Com's global backbone was the first network of its kind to offer a commercial
dual-stack IPv6 transit service, initially in the United States and later
globally. The company's highly experienced IPv6 engineers remain in the
forefront of IPv6 implementation.

At a news conference on February 3, 2011 in Miami, Florida, the Internet
Corporation for Assigned Names and Numbers (ICANN) joined the Number
Resources Organization (NRO), the Internet Architecture Board (IAB) and the
Internet Society in announcing that the pool of first-generation Internet
addresses has now been completely emptied. During the conference, Rod
Beckman, President and CEO of ICANN mentioned NTT as a telco leading the
charge and adopting IPv6 to move to the new protocol.

    About NTT Communications Corporation
    Please visit www.ntt.com/index-e.html.

(Ms.) Akiko Suzaki, NTT Communications, Public Relations Office, Tel. +81-3-6700-4010, hodo-cp at ntt.com, NTT Plala, Public Relations Office, press at plala.co.jp; Scott Heller, Global IP Network, NTT America, Inc., Tel. +1-425-250-2495, sheller at us.ntt.net