2010 Press Releases

TOKYO--July 28, 2010--Internet Initiative Japan Inc. (IIJ, NASDAQ: IIJI, TSE1: 3774), one of Japan's leading Internet access and comprehensive network solutions providers, announced the completion of IPv6 network compatibility for the mail services on the IIJ4U and IIJmio Internet connectivity services for individuals as of July 27, 2010.

Starting last year IIJ embarked on a project to make the IIJ4U mail service, IIJmio Safety Mail, and IIJmio Personal Domain services compatible with IPv6 networks. In August 2009, IIJ implemented IPv4/IPv6 dual stack (*) compatibility on mail servers of IIJ and other companies, and customers on the IPv4 IIJ4U and IIJmio services could send and receive e-mail to IPv4/IPv6 networks.

This most recent project has implemented IPv4/IPv6 dual stack compatibility for mail servers that customers connect to directly. This enables users to exchange e-mail with IPv4/IPv6 users from within existing IPv4 networks as well as from IPv6 networks. There are no configuration adjustments required for existing users as a result of this project. Even if customers migrate to an IPv6 network environment, they will not have to change anything to continue to use the mail services.

IIJ pioneered IPv6 usage with the introduction of the IPv6 Tunneling Service in August 1999, and the company has implemented IPv6 in a variety of network enterprise applications. IIJ will continue to leverage its expertise in IPv6 applications to increase the usefulness of the Internet.

• (*) Dual stack technology allows simultaneous usage of IPv4 and IPv6 protocols without concern for the differences in the IPv4 and IPv6 environments.

About IIJ

Founded in 1992, Internet Initiative Japan Inc. (IIJ, NASDAQ: IIJI, Tokyo Stock Exchange TSE1: 3774) is one of Japan's leading Internet-access and comprehensive network solutions providers. IIJ and its group of companies provide total network solutions that mainly cater to high-end corporate customers. The company's services include high-quality systems integration and security services, Internet access, hosting/housing, and content design. Moreover, the company has built one of the largest Internet backbone networks in Japan, and between Japan and the United States. IIJ was listed on NASDAQ in 1999 and on the First Section of the Tokyo Stock Exchange in 2006. For more information about IIJ, visit the IIJ Web site at http://www.iij.ad.jp/en/.

The statements within this release contain forward-looking statements about our future plans that involve risk and uncertainty. These statements may differ materially from actual future events or results. Readers are referred to the documents furnished by Internet Initiative Japan Inc. with the SEC, specifically the most recent reports on Forms 20-F and 6-K, which identify important risk factors that could cause actual results to differ from those contained in the forward-looking statements.