{
  "spec_version": "4",
  "endpoint": "financials-segment",
  "stock_code": "1799",
  "company_name": "第一建設工業",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/1799/current/#revenue-mix",
  "api_url": "/api/1799/financials/segment.json",
  "updated": "2026-09-19",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/1799/current/#revenue-mix",
  "source": {
    "segment": {
      "primary": [
        "有価証券報告書（セグメント情報）"
      ],
      "extraction": "EDINET の XBRL から機械抽出",
      "caveat": "セグメント区分は各期の開示区分をそのまま採録しており、期をまたいだ区分の連続性は保証しない"
    },
    "region": {
      "primary": [
        "有価証券報告書（所在地別・海外売上高）"
      ],
      "extraction": "EDINET の XBRL から機械抽出",
      "caveat": "地域区分は各期の開示区分をそのまま採録している"
    }
  },
  "html_url": "https://the-shashi.com/tse/1799/current/#revenue-mix",
  "segment": [
    {
      "FY": "FY15",
      "period": "2016/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_",
      "sales": 48437.64,
      "profit": 4849.11,
      "assets": 32469.41
    },
    {
      "FY": "FY15",
      "period": "2016/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000ConstructionBusiness",
      "sales": 46047.28,
      "profit": 4490.7,
      "assets": 26179.51
    },
    {
      "FY": "FY15",
      "period": "2016/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000RealEstateBusiness",
      "sales": 2390.36,
      "profit": 358.41,
      "assets": 6289.91
    },
    {
      "FY": "FY16",
      "period": "2017/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_",
      "sales": 48387.09,
      "profit": 4452.05,
      "assets": 34696.28
    },
    {
      "FY": "FY16",
      "period": "2017/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000ConstructionBusiness",
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      "assets": 28244.67
    },
    {
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      "period": "2017/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000RealEstateBusiness",
      "sales": 766.01,
      "profit": 269.96,
      "assets": 6451.61
    },
    {
      "FY": "FY17",
      "period": "2018/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_",
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      "profit": 6117.09,
      "assets": 36852.72
    },
    {
      "FY": "FY17",
      "period": "2018/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000ConstructionBusiness",
      "sales": 49851.7,
      "profit": 5831.11,
      "assets": 30621.86
    },
    {
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000RealEstateBusiness",
      "sales": 764.44,
      "profit": 285.98,
      "assets": 6230.85
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_",
      "sales": 49839.71,
      "profit": 5067.75,
      "assets": 33467.22
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000ConstructionBusiness",
      "sales": 49068.33,
      "profit": 4781.52,
      "assets": 27410.87
    },
    {
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000RealEstateBusiness",
      "sales": 771.38,
      "profit": 286.23,
      "assets": 6056.35
    },
    {
      "FY": "FY19",
      "period": "2020/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_",
      "sales": 47940.35,
      "profit": 4005.61,
      "assets": 40950.37
    },
    {
      "FY": "FY19",
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000ConstructionBusiness",
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      "profit": 3799.45,
      "assets": 34151.78
    },
    {
      "FY": "FY19",
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000RealEstateBusiness",
      "sales": 747.95,
      "profit": 206.16,
      "assets": 6798.59
    },
    {
      "FY": "FY20",
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_",
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      "profit": 5127.64,
      "assets": 48968.4
    },
    {
      "FY": "FY20",
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000ConstructionBusiness",
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      "profit": 4989.22,
      "assets": 41725.09
    },
    {
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
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      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000RealEstateBusiness",
      "sales": 769.88,
      "profit": 138.42,
      "assets": 7243.31
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_",
      "sales": 42748.38,
      "profit": 2794.16,
      "assets": 39246.73
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000ConstructionBusiness",
      "sales": 41954.35,
      "profit": 2824.74,
      "assets": 31798.46
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000RealEstateBusiness",
      "sales": 794.03,
      "profit": -30.58,
      "assets": 7448.27
    },
    {
      "FY": "FY22",
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_",
      "sales": 47367.1,
      "profit": 3569.15,
      "assets": 47705.29
    },
    {
      "FY": "FY22",
      "period": "2023/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000ConstructionBusiness",
      "sales": 46516.22,
      "profit": 3387.75,
      "assets": 38389.76
    },
    {
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
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      "assets": 9315.53
    },
    {
      "FY": "FY23",
      "period": "2024/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
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      "segment": "NonConsolidatedMember_",
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      "assets": 49409.86
    },
    {
      "FY": "FY23",
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
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      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000ConstructionBusiness",
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      "assets": 39309.52
    },
    {
      "FY": "FY23",
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000RealEstateBusiness",
      "sales": 1017.97,
      "profit": 292.6,
      "assets": 10100.34
    },
    {
      "FY": "FY24",
      "period": "2025/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_",
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      "profit": 7193.9,
      "assets": 53157.72
    },
    {
      "FY": "FY24",
      "period": "2025/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000ConstructionBusiness",
      "sales": 56928.83,
      "profit": 6957.31,
      "assets": 42320.76
    },
    {
      "FY": "FY24",
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
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      "segment": "NonConsolidatedMember_jpcrp030000-asr_E00250-000RealEstateBusiness",
      "sales": 1076.79,
      "profit": 236.59,
      "assets": 10836.96
    }
  ],
  "region": [
    {
      "FY": "FY17",
      "period": "2018/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "region": null,
      "sales": null
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "region": null,
      "sales": null
    },
    {
      "FY": "FY19",
      "period": "2020/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "region": null,
      "sales": null
    },
    {
      "FY": "FY20",
      "period": "2021/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "region": null,
      "sales": null
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "region": null,
      "sales": null
    },
    {
      "FY": "FY22",
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      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "region": null,
      "sales": null
    },
    {
      "FY": "FY23",
      "period": "2024/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "region": null,
      "sales": null
    },
    {
      "FY": "FY24",
      "period": "2025/3",
      "unit": "百万円",
      "accounting_standard": "JGAAP",
      "consolidation": "連結",
      "region": null,
      "sales": null
    }
  ]
}