RISO KAGAKU CORPORATION
TSE Prime
Shareholding pattern
As reported in the annual securities report, 2026-03-31.
| Foreign institutions | 4.71% |
|---|---|
| Individuals | 46.55% |
| Top 10 holders | 57.29% |
| Total shareholders | 3,027 |
Who owns the company
Share of voting unitsIndividuals & others 46.55%Other corporations 34.11%Financial institutions 14.23%Foreign institutions 4.71%Securities firms 0.39%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 |
|---|---|---|
| Individuals & others | 46.55% | 2,807 |
| Other corporations | 34.11% | 48 |
| Financial institutions | 14.23% | 16 |
| Foreign institutions | 4.71% | 119 |
| Securities firms | 0.39% | 22 |
| Foreign individuals | 0.01% | 15 |
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 | 有限会社理想社 | 9,883,000 | 15.71% |
| 2 | 公益財団法人理想教育財団 | 5,323,000 | 8.46% |
| 3 | あかつき興産株式会社 | 3,918,000 | 6.22% |
| 4 | 日本マスタートラスト信託銀行株式会社（信託口） | 3,769,000 | 5.99% |
| 5 | みずほ信託銀行株式会社退職給付信託きらぼし銀行口再信託受託者株式会社日本カストディ銀行 | 3,135,000 | 4.98% |
| 6 | 羽山 治 | 2,388,000 | 3.79% |
| 7 | 羽山 尚 | 2,235,000 | 3.55% |
| 8 | 羽山 明 | 1,953,000 | 3.10% |
| 9 | 理想科学工業従業員持株会 | 1,815,000 | 2.88% |
| 10 | 伊藤 眞理子 | 1,646,000 | 2.61% |
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.