{
  "stock_code": "4503",
  "company_name": "アステラス製薬",
  "company_color": "#D81E49",
  "industry": "pharma",
  "published": "2026-04-06",
  "updated": "2026-05-01",
  "found": {
    "year": 1923,
    "location": "大阪市",
    "founder": "山内健二"
  },
  "listing": {
    "listed_year": 1949,
    "delisted_year": null,
    "unlisted": false
  }
}