As reported in the annual securities report, 2026-03-31.
| Foreign institutions | 2.04% |
|---|---|
| Individuals | 69.59% |
| Top 10 holders | 44.02% |
| Total shareholders | 1,274 |
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 | 69.59% | 1,196 |
| Other corporations | 23.94% | 46 |
| Financial institutions | 3.88% | 3 |
| Foreign institutions | 2.04% | 13 |
| Securities firms | 0.55% | 15 |
| Government | 0.01% | 1 |
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 | 中国砿業株式会社 | 249,000 | 11.69% |
| 2 | 丸尾 治男 | 167,000 | 7.85% |
| 3 | 山陽化学産業株式会社 | 114,000 | 5.35% |
| 4 | 丸尾 政雄 | 92,000 | 4.33% |
| 5 | 今井 一史 | 72,000 | 3.41% |
| 6 | 丸尾 直子 | 54,000 | 2.57% |
| 7 | 中西電機工業株式会社 | 54,000 | 2.56% |
| 8 | 損害保険ジャパン株式会社 | 51,000 | 2.41% |
| 9 | 丸尾カルシウム従業員持株会 | 46,000 | 2.19% |
| 10 | 深津 秀郎 | 35,000 | 1.66% |
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.