Internet Initiative Japan Inc.
TSE Prime
Shareholding pattern
As reported in the annual securities report, 2026-03-31.
| Foreign institutions | 29.13% |
|---|---|
| Individuals | 14.11% |
| Top 10 holders | 47.48% |
| Total shareholders | 10,895 |
Who owns the company
Share of voting unitsOther corporations 31.49%Foreign institutions 29.13%Financial institutions 21%Individuals & others 14.11%Securities firms 4.27%Foreign individuals 0.01%
How to read this: each slice is a group of investors. Foreign and financial institutions are professional money; individuals are retail shareholders; other corporations are usually business partners holding strategic stakes. A large institutional slice generally means heavier analyst coverage and more trading volume.
Ownership Trend
Holding %, recent yearsForeign institutionsFinancial institutionsIndividualsOther corporationsSecurities firms
How to read this: each line shows how one investor group's share has moved over recent years. A rising foreign or institutional line can signal growing professional interest; a falling one the opposite. Japanese companies disclose ownership once a year, so these are annual points — read the direction over several years rather than a single step.
Ownership detail
| Investor category | Holding % | Shareholders |
|---|---|---|
| Other corporations | 31.49% | 80 |
| Foreign institutions | 29.13% | 306 |
| Financial institutions | 21.00% | 38 |
| Individuals & others | 14.11% | 10,409 |
| Securities firms | 4.27% | 34 |
| Foreign individuals | 0.01% | 28 |
How to read this: a high foreign or institutional share often means the stock is widely researched and more liquid; a high individual share means retail investors hold most of the company. Percentages are of voting units.
Largest shareholders
| S.No. | Shareholder | Shares | Stake % |
|---|---|---|---|
| 1 | KDDI株式会社 | 20,387,000 | 11.50% |
| 2 | NTT株式会社 | 12,227,000 | 6.90% |
| 3 | 日本マスタートラスト信託銀行株式会社（その他信託口）（注)2 | 8,904,200 | 5.02% |
| 4 | NTTドコモビジネス株式会社 | 8,160,000 | 4.60% |
| 5 | 伊藤忠テクノソリューションズ株式会社 | 7,808,000 | 4.40% |
| 6 | 鈴木 幸一 | 7,427,521 | 4.19% |
| 7 | 日本マスタートラスト信託銀行株式会社（投資信託口）（注)2 | 7,009,400 | 3.95% |
| 8 | 第一生命保険株式会社 （常任代理人 株式会社日本カストディ銀行） | 5,123,800 | 2.89% |
| 9 | 株式会社日本カストディ銀行（投資信託口）(注)3 | 3,902,800 | 2.20% |
| 10 | 株式会社KS Holdings（注)4 | 3,240,000 | 1.83% |
Trust banks such as Master Trust and Custody Bank appear at the top of most Japanese registers: they hold shares on behalf of many underlying funds rather than owning them outright.