{
  "stock_code": "5631",
  "company_name": "日本製鋼所",
  "company_color": "#00A291",
  "industry": "heavy",
  "published": "2026-04-09",
  "updated": "2026-05-07",
  "found": {
    "year": 1907,
    "location": "北海道室蘭",
    "founder": "※北海道炭礦汽船"
  },
  "listing": {
    "listed_year": 1951,
    "delisted_year": null,
    "unlisted": false
  }
}