Since its inception in the early 1990s, Internet Initiative Japan (IIJ) has actively promoted
peering with major domestic and international
Internet Exchanges. As an independent IP-specialized
ISP—distinct from traditional
legacy carriers—IIJ constructed its own large-scale
backbone connecting Japan's major cities. The company also contributed to regional infrastructure by helping develop A-Bone, an international backbone for the Asia-Pacific region. This project was managed through Asia Internet Holding Co., Ltd., established in 1995 and later merged into IIJ in 2005. IIJ serves a customer base of over 11,000 organizations, including Japanese government agencies and private enterprises. The company holds a significant market share among large-scale corporations requiring complex
systems integration. Notably, IIJ provides services to at least half of the top 10 companies in most Japanese industries, and the vast majority of leading firms in several key sectors. IIJ was founded by core members of the
WIDE Project, including
Jun Murai and . Due to these academic origins, the company remains an active participant in internet research, proof-of-concept trials, and international standardization efforts via the WIDE Project and
EPCglobal. Compared to other Japanese ISPs, IIJ maintains a high ratio of investment in research and development (R&D). In 1998, IIJ established (CWC) as a joint venture with
Toyota and
Sony, launching a pioneering
wide-area Ethernet service. However, following the burst of the
dot-com bubble and intensifying competition, CWC filed for corporate reorganization in August 2003. Its operations were transferred to
NTT Communications that December. The resulting extraordinary loss led to a significant deficit for IIJ, resulting in the
NTT Group becoming a major shareholder with a approximately 30% stake through a third-party allotment of new shares. ==References==