大株主の所有状況（株式数、持株比率）
[{"name":"西川ゴム工業株式会社","value":11835200,"percentage":"16.64"},{"name":"日本マスタートラスト信託銀行株式会社（信託口）","value":6283600,"percentage":"8.83"},{"name":"株式会社イノアックコーポレーション","value":3924600,"percentage":"5.52"},{"name":"株式会社広島銀行","value":3541800,"percentage":"4.98"},{"name":"マツダ株式会社","value":3541800,"percentage":"4.98"},{"name":"三井物産株式会社","value":3222720,"percentage":"4.53"},{"name":"住友商事ケミカル株式会社","value":2858944,"percentage":"4.02"},{"name":"三菱商事プラスチック株式会社","value":2659800,"percentage":"3.74"},{"name":"株式会社日本カストディ銀行（信託口）","value":1771500,"percentage":"2.49"},{"name":"ダイキョーニシカワ社員持株会","value":1409256,"percentage":"1.98"}]
上位10株主の持株比率合計は57.71%です。
所有者別構成（単元数、持株比率）
[{"name":"その他の法人","value":330187,"percentage":"44.72"},{"name":"個人その他","value":180056,"percentage":"24.39"},{"name":"金融機関","value":131703,"percentage":"17.84"},{"name":"個人以外","value":0,"percentage":"11.8"},{"name":"金融商品取引業者","value":8707,"percentage":"1.18"},{"name":"個人","value":0,"percentage":"0.07"}]