大株主の所有状況（株式数、持株比率）
[{"name":"三菱重工業株式会社","value":3746000,"percentage":"35.1"},{"name":"東京中小企業投資育成株式会社","value":733000,"percentage":"6.87"},{"name":"放電精密加工研究所社員持株会","value":403000,"percentage":"3.77"},{"name":"株式会社二村","value":389000,"percentage":"3.64"},{"name":"株式会社三菱UFJ銀行","value":325000,"percentage":"3.05"},{"name":"二村山林有限会社","value":272000,"percentage":"2.55"},{"name":"日本マスタートラスト信託銀行株式会社","value":261000,"percentage":"2.44"},{"name":"二村 勝彦","value":242000,"percentage":"2.27"},{"name":"細江 廣太郎","value":186000,"percentage":"1.74"},{"name":"日本碍子株式会社","value":180000,"percentage":"1.68"}]
上位10株主の持株比率合計は63.11%です。
所有者別構成（単元数、持株比率）
[{"name":"その他の法人","value":57655,"percentage":"52.66"},{"name":"個人その他","value":42013,"percentage":"38.37"},{"name":"金融機関","value":7450,"percentage":"6.8"},{"name":"個人以外","value":0,"percentage":"1.69"},{"name":"金融商品取引業者","value":488,"percentage":"0.45"},{"name":"個人","value":0,"percentage":"0.03"}]