IIJ Adds Spam Filtering Features to its Consumer Internet Service IIJmio

Business Wire, Feb 23, 2005

TOKYO -- Internet Initiative Japan Inc. (IIJ, NASDAQ: IIJI), one of Japan's leading Internet access and comprehensive network solutions providers, today announced that it will add spam filtering features to IIJmio, an Internet service for consumer customers. U.S.-based MX Logic's filtering engine will provide the spam filtering features that enable customers to dispose of spam on the server without ever having to download it to their personal computer.

Spam is emailed in huge volumes to people without their consent. This has become a very serious problem in the U.S., and the problem has grown dramatically in Japan over the last year as well. Spam is also the primary modus operandi for a type of fraud called "phishing," in which spammers pretend to be financial institutions or e-commerce sites in order to elicit personal information from unsuspecting victims, thus making spam a serious social problem as well.

IIJ's corporate customer email outsourcing service and IIJ4U already provide a spam filtering feature. This feature has now been extended to IIJmio's Personal Domain Service, Safety Mail Service, and Prime Mail Service. The spam filter calculates a score for each message that indicates the probability of that message being spam (from 0% to 100%), and the customer has several options from which to choose to determine how the message is handled. The options are "Receive all messages," "IIJ determines which messages are spam and routes them to trash bin," and "Route messages with a score of N% or higher to the trash bin."

For subscribers of IIJmio Personal Domain Service, IIJmio Safety Mail Service, or IIJmio Prime Mail Service, the new spam filtering feature will be free. IIJ will continue to improve its services and give customers the most user-friendly email environment possible.

Service Description

----------------------------------------------------------------------
IIJmio Safety Mail Service          Mail service with full security
                                     features at a reasonable price.
                                    Monthly fee (tax included):
                                     JPY 525
----------------------------------------------------------------------
IIJmio Personal Domain Service      Personalized domain name email/web
                                     service.
                                    Monthly fee (tax included):
                                     JPY 3,990
----------------------------------------------------------------------
IIJmio Prime Mail Service           Email service with service level
                                     agreement (SLA) providing high
                                     quality and reliability.
                                    Complete redundancy of sending
                                     and receiving servers.
                                    Monthly fee (tax included):
                                     JPY 10,500
----------------------------------------------------------------------

About IIJ

Founded in 1992, Internet Initiative Japan Inc. (IIJ, NASDAQ: IIJI) is one of Japan's leading Internet-access and comprehensive network solutions providers. The company has built one of the largest Internet backbone networks in Japan, and between Japan and the United States. 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.

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.