SEIGAKUSHA CO.,LTD.
TSE Standard
Shareholding pattern
As reported in the annual securities report, 2026-03-31.
| Foreign institutions | 0.07% |
|---|---|
| Individuals | 60.70% |
| Top 10 holders | 72.81% |
| Total shareholders | 7,247 |
Who owns the company
Share of voting unitsIndividuals & others 60.7%Other corporations 38.78%Financial institutions 0.27%Securities firms 0.17%Foreign institutions 0.07%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 | 60.70% | 7,164 |
| Other corporations | 38.78% | 68 |
| Financial institutions | 0.27% | 1 |
| Securities firms | 0.17% | 8 |
| Foreign institutions | 0.07% | 2 |
| Foreign individuals | 0.01% | 4 |
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 | 太田 明弘 | 1,471,200 | 26.51% |
| 2 | 株式会社オーシャス | 1,176,000 | 21.19% |
| 3 | 学校法人高宮学園 | 277,000 | 4.99% |
| 4 | 成学社従業員持株会 | 252,800 | 4.55% |
| 5 | 株式会社くふうカンパニーホールディングス | 249,900 | 4.50% |
| 6 | 太田 貴美子 | 174,000 | 3.13% |
| 7 | 株式会社さなる | 159,000 | 2.86% |
| 8 | 株式会社仙台進学プラザ | 119,400 | 2.15% |
| 9 | 永井 博 | 104,326 | 1.88% |
| 10 | 有限会社日本作文指導協会 | 58,600 | 1.05% |
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.