Investor Presentaiton

Appendix IIJ Group's Client base: approx. 13,000 enterprises High penetration toward top 10 companies of each industry Retail 5% 100% 100% 80% 100% 90% Electronic Information/ Telecommuni- cations Machinery Precision equipment Banking 100% 80% 90% 100% 100% Securities Retailing Wholesales Construction Insurance Client distribution per industry Client distribution per revenue volume Construction/ Real estate 6% Communication, Top 501- 22% IT 26% Top 401-500 4% Manufacturing 11% Public 15% Top 301-400 5% Finance 19% Service 18% Top 201- 300 8% Top 101-200 13% Top 1-100 48% Number of IIJ group's clients is as of March 31, 2021 Top ten firms in each industry taken from annual revenues are selected by IIJ based on the Yahoo! Japan Finance website (finance/sales/whole market/daily) and are based on IIJ's FY21 results and prepared by IIJ Client distribution is based on IIJ's FY21 results and prepared by IIJ Internet Initiative Japan Inc. 24

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