As reported in the annual securities report, 2026-03-31.
| Foreign institutions | 3.87% |
|---|---|
| Individuals | 61.59% |
| Top 10 holders | 32.16% |
| Total shareholders | 8,283 |
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.
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.
| Investor category | Holding % | Shareholders |
|---|---|---|
| Individuals & others | 61.59% | 8,094 |
| Other corporations | 13.44% | 80 |
| Financial institutions | 13.13% | 10 |
| Securities firms | 7.57% | 42 |
| Foreign institutions | 3.87% | 26 |
| Foreign individuals | 0.41% | 31 |
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.
| S.No. | Shareholder | Shares | Stake % |
|---|---|---|---|
| 1 | 株式会社日本カストディ銀行(信託口) | 775,400 | 6.66% |
| 2 | ダイヤモンドエンジニアリング株式会社 | 642,516 | 5.52% |
| 3 | 日本マスタートラスト信託銀行株式会社(信託口) | 610,700 | 5.24% |
| 4 | All Diamond Shareholders | 501,300 | 4.30% |
| 5 | 大和証券株式会社 | 312,970 | 2.69% |
| 6 | 楽天証券株式会社共有口 | 215,500 | 1.85% |
| 7 | 池永 辰朗 | 210,500 | 1.81% |
| 8 | BNP PARIBAS LONDON BRANCH FOR PRIME BROKERAGE CLEARANCE ACC FOR THIRD PARTY(常任代理人 香港上海銀行東京支店) | 205,200 | 1.76% |
| 9 | 豊栄産業株式会社 | 140,000 | 1.20% |
| 10 | 上田八木短資株式会社 | 131,500 | 1.13% |
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.