{ "snapshot": "2026-07", "observed_at": "2026-07-14T14:42:42.229437+00:00", "total_datasets": 18253, "source": { "name": "e-Govデータポータル データカタログサイトAPI（CKAN）", "endpoint": "https://data.e-gov.go.jp/data/api/action/package_search", "license": "公共データ利用規約（第1.0版）PDL1.0", "attribution_required": true, "attribution_text": "出典：e-Govポータル（https://www.e-gov.go.jp）", "processing_note": "saki♮ Lab が集計・加工。集計値は原データそのものではない。" }, "metrics": { "license_twist": { "machine_open": { "count": 0, "of": 18253, "pct": 0.0 }, "human_licensed": { "count": 17866, "of": 18253, "pct": 97.9 }, "distribution": [ { "license": "cc-by", "count": 15406, "of": 18253, "pct": 84.4 }, { "license": "gjstu", "count": 2384, "of": 18253, "pct": 13.1 }, { "license": "（記載なし）", "count": 387, "of": 18253, "pct": 2.1 }, { "license": "政府標準利用規約（第 2.0 版）", "count": 60, "of": 18253, "pct": 0.3 }, { "license": "pdl-1.0", "count": 7, "of": 18253, "pct": 0.0 }, { "license": "gjstu + 政府標準利用規約（第 2.0 版）", "count": 4, "of": 18253, "pct": 0.0 }, { "license": "cc-by + cc-by-2.1-jp", "count": 1, "of": 18253, "pct": 0.0 }, { "license": "cc-by-4.0", "count": 1, "of": 18253, "pct": 0.0 }, { "license": "cc-by + cc-by-nc-sa", "count": 1, "of": 18253, "pct": 0.0 }, { "license": "cc-by + cc-by-nc", "count": 1, "of": 18253, "pct": 0.0 }, { "license": "cc-by + gjstu", "count": 1, "of": 18253, "pct": 0.0 } ], "uniform_across_orgs": true }, "format_ladder": { "levels": [ { "level": "L0", "label": "リソースが1つも無い", "count": 136, "of": 18253, "pct": 0.7 }, { "level": "L1", "label": "PDF/HTML/画像のみ", "count": 10669, "of": 18253, "pct": 58.5 }, { "level": "L2", "label": "Excel/Word/PowerPoint等（構造化されているが独自形式）", "count": 6119, "of": 18253, "pct": 33.5 }, { "level": "L3", "label": "CSV/TSV/JSON/XML/GeoJSON/KML/SHP等（オープンな構造化形式）", "count": 1198, "of": 18253, "pct": 6.6 }, { "level": "L4", "label": "RDF/LOD/JSON-LD/N3（リンクトデータ）", "count": 0, "of": 18253, "pct": 0.0 }, { "level": "UNKNOWN", "label": "判定不能（ZIP/TXT・format欄が空）", "count": 131, "of": 18253, "pct": 0.7 } ], "has_csv": { "count": 968, "of": 18253, "pct": 5.3 }, "format_counts": [ { "format": "PDF", "count": 9331 }, { "format": "HTML", "count": 6466 }, { "format": "XLS", "count": 4564 }, { "format": "XLSX", "count": 1724 }, { "format": "CSV", "count": 968 }, { "format": "ZIP", "count": 223 }, { "format": "JPEG", "count": 203 }, { "format": "XML", "count": 152 }, { "format": "GIF", "count": 84 }, { "format": "KMZ", "count": 72 }, { "format": "PNG", "count": 47 }, { "format": "DOCX", "count": 21 } ] }, "freshness_measurability": { "verdict": "unmeasurable", "candidate_1": { "field": "metadata_modified", "rejected_because": "ポータル側の更新日時。2023年に集中＝移行による一括更新の跡", "by_year": [ { "year": "2017", "count": 1, "of": 18253, "pct": 0.0 }, { "year": "2018", "count": 135, "of": 18253, "pct": 0.7 }, { "year": "2019", "count": 5, "of": 18253, "pct": 0.0 }, { "year": "2020", "count": 124, "of": 18253, "pct": 0.7 }, { "year": "2021", "count": 230, "of": 18253, "pct": 1.3 }, { "year": "2022", 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{ "year": "2008", "count": 354 }, { "year": "2007", "count": 166 }, { "year": "2006", "count": 152 }, { "year": "2005", "count": 158 }, { "year": "2004", "count": 150 }, { "year": "2003", "count": 154 }, { "year": "2002", "count": 99 }, { "year": "2001", "count": 80 }, { "year": "2000", "count": 70 }, { "year": "1999", "count": 75 }, { "year": "1998", "count": 20 }, { "year": "1997", "count": 20 }, { "year": "1996", "count": 16 }, { "year": "1995", "count": 17 }, { "year": "1994", "count": 16 }, { "year": "1993", "count": 14 }, { "year": "1992", "count": 9 }, { "year": "1991", "count": 13 }, { "year": "1990", "count": 14 }, { "year": "1989", "count": 10 }, { "year": "1988", "count": 6 }, { "year": "1987", "count": 12 }, { "year": "1986", "count": 9 }, { "year": "1985", "count": 10 }, { "year": "1984", "count": 9 }, { "year": "1983", "count": 11 }, { "year": "1982", "count": 10 }, { "year": "1981", "count": 9 }, { "year": "1980", "count": 8 }, { "year": "1979", "count": 10 }, { "year": "1978", "count": 10 }, { "year": "1977", "count": 8 }, { "year": "1976", "count": 6 }, { "year": "1975", "count": 6 }, { "year": "1974", "count": 5 }, { "year": "1973", "count": 4 }, { "year": "1972", "count": 4 }, { "year": "1971", "count": 4 }, { "year": "1970", "count": 4 }, { "year": "1969", "count": 4 }, { "year": "1968", "count": 4 }, { "year": "1967", "count": 3 }, { "year": "1966", "count": 3 }, { "year": "1965", "count": 4 }, { "year": "1964", "count": 2 }, { "year": "1963", "count": 3 }, { "year": "1962", "count": 1 }, { "year": "1961", "count": 2 }, { "year": "1960", "count": 1 } ] } }, "update_frequency_declared": { "declared": { "count": 16197, "of": 18253, "pct": 88.7 }, "blank": { "count": 2056, "of": 18253, "pct": 11.3 }, "raw_values": [ { "value": "1年", "count": 8272, "of": 18253, "pct": 45.3 }, { "value": "不定期", "count": 3548, "of": 18253, "pct": 19.4 }, { "value": "更新しない", "count": 999, "of": 18253, "pct": 5.5 }, { "value": "1月", "count": 844, "of": 18253, "pct": 4.6 }, { "value": "１年", "count": 497, "of": 18253, "pct": 2.7 }, { "value": "5年", "count": 457, "of": 18253, "pct": 2.5 }, { "value": "3月", "count": 204, "of": 18253, "pct": 1.1 }, { "value": "6月", "count": 136, "of": 18253, "pct": 0.7 }, { "value": "Yearly", "count": 106, "of": 18253, "pct": 0.6 }, { "value": "6時間", "count": 100, "of": 18253, "pct": 0.5 }, { "value": "1時間", "count": 100, "of": 18253, "pct": 0.5 }, { "value": "少なくとも年１回", "count": 98, "of": 18253, "pct": 0.5 } ], "distinct_raw_values": 68, "verifiable": false }, "org_breakdown": [ { "org": "厚生労働省", "n": 2478, "ladder": { "L0": 5, "L1": 1226, "L2": 749, "L3": 480, "L4": 0, "UNKNOWN": 18 }, "l3_plus": { "count": 480, "of": 2478, "pct": 19.4 }, "l1_only": { "count": 1226, "of": 2478, "pct": 49.5 }, "no_date": { "count": 1696, "of": 2478, "pct": 68.4 }, "declared": { "count": 2155, "of": 2478, "pct": 87.0 } }, { "org": "農林水産省", "n": 2209, "ladder": { "L0": 17, "L1": 504, "L2": 1679, "L3": 8, "L4": 0, "UNKNOWN": 1 }, "l3_plus": { "count": 8, "of": 2209, "pct": 0.4 }, "l1_only": { "count": 504, "of": 2209, "pct": 22.8 }, "no_date": { "count": 481, "of": 2209, "pct": 21.8 }, "declared": { "count": 2192, "of": 2209, "pct": 99.2 } }, { "org": "文部科学省", "n": 1986, "ladder": { "L0": 7, "L1": 748, "L2": 1204, "L3": 4, "L4": 0, "UNKNOWN": 23 }, "l3_plus": { "count": 4, "of": 1986, "pct": 0.2 }, "l1_only": { "count": 748, "of": 1986, "pct": 37.7 }, "no_date": { "count": 271, "of": 1986, "pct": 13.6 }, "declared": { "count": 1824, "of": 1986, "pct": 91.8 } }, { "org": "国土交通省", "n": 1865, "ladder": { "L0": 9, "L1": 1414, "L2": 393, "L3": 14, "L4": 0, "UNKNOWN": 35 }, "l3_plus": { "count": 14, "of": 1865, "pct": 0.8 }, "l1_only": { "count": 1414, "of": 1865, "pct": 75.8 }, "no_date": { "count": 1447, "of": 1865, "pct": 77.6 }, "declared": { "count": 1560, "of": 1865, "pct": 83.6 } }, { "org": "内閣府", "n": 1760, "ladder": { "L0": 0, "L1": 1604, "L2": 96, "L3": 58, "L4": 0, "UNKNOWN": 2 }, "l3_plus": { "count": 58, "of": 1760, "pct": 3.3 }, "l1_only": { "count": 1604, "of": 1760, "pct": 91.1 }, "no_date": { "count": 271, "of": 1760, "pct": 15.4 }, "declared": { "count": 1451, "of": 1760, "pct": 82.4 } }, { "org": "環境省", "n": 1701, "ladder": { "L0": 0, "L1": 1119, "L2": 188, "L3": 384, "L4": 0, "UNKNOWN": 10 }, "l3_plus": { "count": 384, "of": 1701, "pct": 22.6 }, "l1_only": { "count": 1119, "of": 1701, "pct": 65.8 }, "no_date": { "count": 1157, "of": 1701, "pct": 68.0 }, "declared": { "count": 1656, "of": 1701, "pct": 97.4 } }, { "org": "財務省", "n": 1007, "ladder": { "L0": 9, "L1": 311, "L2": 525, "L3": 150, "L4": 0, "UNKNOWN": 12 }, "l3_plus": { "count": 150, "of": 1007, "pct": 14.9 }, "l1_only": { "count": 311, "of": 1007, "pct": 30.9 }, "no_date": { "count": 333, "of": 1007, "pct": 33.1 }, "declared": { "count": 896, "of": 1007, "pct": 89.0 } }, { "org": "総務省", "n": 928, "ladder": { "L0": 1, "L1": 624, "L2": 237, "L3": 48, "L4": 0, "UNKNOWN": 18 }, "l3_plus": { "count": 48, "of": 928, "pct": 5.2 }, "l1_only": { "count": 624, "of": 928, "pct": 67.2 }, "no_date": { "count": 637, "of": 928, "pct": 68.6 }, "declared": { "count": 814, "of": 928, "pct": 87.7 } }, { "org": "法務省", "n": 847, "ladder": { "L0": 0, "L1": 592, "L2": 253, "L3": 0, "L4": 0, "UNKNOWN": 2 }, "l3_plus": { "count": 0, "of": 847, "pct": 0.0 }, "l1_only": { "count": 592, "of": 847, "pct": 69.9 }, "no_date": { "count": 486, "of": 847, "pct": 57.4 }, "declared": { "count": 811, "of": 847, "pct": 95.7 } }, { "org": "警察庁", "n": 834, "ladder": { "L0": 0, "L1": 388, "L2": 438, "L3": 7, "L4": 0, "UNKNOWN": 1 }, "l3_plus": { "count": 7, "of": 834, "pct": 0.8 }, "l1_only": { "count": 388, "of": 834, "pct": 46.5 }, "no_date": { "count": 371, "of": 834, "pct": 44.5 }, "declared": { "count": 776, "of": 834, "pct": 93.0 } }, { "org": "個人情報保護委員会", "n": 608, "ladder": { "L0": 0, "L1": 608, "L2": 0, "L3": 0, "L4": 0, "UNKNOWN": 0 }, "l3_plus": { "count": 0, "of": 608, "pct": 0.0 }, "l1_only": { "count": 608, "of": 608, "pct": 100.0 }, "no_date": { "count": 175, "of": 608, "pct": 28.8 }, "declared": { "count": 328, "of": 608, "pct": 53.9 } }, { "org": "人事院", "n": 325, "ladder": { "L0": 32, "L1": 189, "L2": 73, "L3": 31, "L4": 0, "UNKNOWN": 0 }, "l3_plus": { "count": 31, "of": 325, "pct": 9.5 }, "l1_only": { "count": 189, "of": 325, "pct": 58.2 }, "no_date": { "count": 88, "of": 325, "pct": 27.1 }, "declared": { "count": 302, "of": 325, "pct": 92.9 } }, { "org": "外務省", "n": 307, "ladder": { "L0": 0, "L1": 277, "L2": 20, "L3": 10, "L4": 0, "UNKNOWN": 0 }, "l3_plus": { "count": 10, "of": 307, "pct": 3.3 }, "l1_only": { "count": 277, "of": 307, "pct": 90.2 }, "no_date": { "count": 237, "of": 307, "pct": 77.2 }, "declared": { "count": 216, "of": 307, "pct": 70.4 } }, { "org": "防衛省", "n": 278, "ladder": { "L0": 42, "L1": 226, "L2": 10, "L3": 0, "L4": 0, "UNKNOWN": 0 }, "l3_plus": { "count": 0, "of": 278, "pct": 0.0 }, "l1_only": { "count": 226, "of": 278, "pct": 81.3 }, "no_date": { "count": 137, "of": 278, "pct": 49.3 }, "declared": { "count": 252, "of": 278, "pct": 90.6 } }, { "org": "公正取引委員会", "n": 273, "ladder": { "L0": 0, "L1": 250, "L2": 23, "L3": 0, "L4": 0, "UNKNOWN": 0 }, "l3_plus": { "count": 0, "of": 273, "pct": 0.0 }, "l1_only": { "count": 250, "of": 273, "pct": 91.6 }, "no_date": { "count": 238, "of": 273, "pct": 87.2 }, "declared": { "count": 251, "of": 273, "pct": 91.9 } }, { "org": "金融庁", "n": 222, "ladder": { "L0": 0, "L1": 140, "L2": 81, "L3": 0, "L4": 0, "UNKNOWN": 1 }, "l3_plus": { "count": 0, "of": 222, "pct": 0.0 }, "l1_only": { "count": 140, "of": 222, "pct": 63.1 }, "no_date": { "count": 42, "of": 222, "pct": 18.9 }, "declared": { "count": 213, "of": 222, "pct": 95.9 } }, { "org": "宮内庁", "n": 189, "ladder": { "L0": 6, "L1": 110, "L2": 73, "L3": 0, "L4": 0, "UNKNOWN": 0 }, "l3_plus": { "count": 0, "of": 189, "pct": 0.0 }, "l1_only": { "count": 110, "of": 189, "pct": 58.2 }, "no_date": { "count": 55, "of": 189, "pct": 29.1 }, "declared": { "count": 189, "of": 189, "pct": 100.0 } }, { "org": "消費者庁", "n": 179, "ladder": { "L0": 7, "L1": 132, "L2": 32, "L3": 1, "L4": 0, "UNKNOWN": 7 }, "l3_plus": { "count": 1, "of": 179, "pct": 0.6 }, "l1_only": { "count": 132, "of": 179, "pct": 73.7 }, "no_date": { "count": 169, "of": 179, "pct": 94.4 }, "declared": { "count": 75, "of": 179, "pct": 41.9 } }, { "org": "内閣法制局", "n": 150, "ladder": { "L0": 1, "L1": 130, "L2": 19, "L3": 0, "L4": 0, "UNKNOWN": 0 }, "l3_plus": { "count": 0, "of": 150, "pct": 0.0 }, "l1_only": { "count": 130, "of": 150, "pct": 86.7 }, "no_date": { "count": 150, "of": 150, "pct": 100.0 }, "declared": { "count": 150, "of": 150, "pct": 100.0 } }, { "org": "経済産業省", "n": 41, "ladder": { "L0": 0, "L1": 41, "L2": 0, "L3": 0, "L4": 0, "UNKNOWN": 0 }, "l3_plus": { "count": 0, "of": 41, "pct": 0.0 }, "l1_only": { "count": 41, "of": 41, "pct": 100.0 }, "no_date": { "count": 41, "of": 41, "pct": 100.0 }, "declared": { "count": 40, "of": 41, "pct": 97.6 } }, { "org": "復興庁", "n": 32, "ladder": { "L0": 0, "L1": 27, "L2": 5, "L3": 0, "L4": 0, "UNKNOWN": 0 }, "l3_plus": { "count": 0, "of": 32, "pct": 0.0 }, "l1_only": { "count": 27, "of": 32, "pct": 84.4 }, "no_date": { "count": 30, "of": 32, "pct": 93.8 }, "declared": { "count": 26, "of": 32, "pct": 81.2 } }, { "org": "デジタル庁", "n": 21, "ladder": { "L0": 0, "L1": 8, "L2": 9, "L3": 3, "L4": 0, "UNKNOWN": 1 }, "l3_plus": { "count": 3, "of": 21, "pct": 14.3 }, "l1_only": { "count": 8, "of": 21, "pct": 38.1 }, "no_date": { "count": 8, "of": 21, "pct": 38.1 }, "declared": { "count": 7, "of": 21, "pct": 33.3 } }, { "org": "内閣官房", "n": 13, "ladder": { "L0": 0, "L1": 1, "L2": 12, "L3": 0, "L4": 0, "UNKNOWN": 0 }, "l3_plus": { "count": 0, "of": 13, "pct": 0.0 }, "l1_only": { "count": 1, "of": 13, "pct": 7.7 }, "no_date": { "count": 0, "of": 13, "pct": 0.0 }, "declared": { "count": 13, "of": 13, "pct": 100.0 } } ] }, "definitions": { "license_twist": { "id": "license_twist", "name": "ライセンスのねじれ", "measures": "パッケージ階層の isopen フラグと、リソース階層の license_id の記載状況。 「機械がオープンと判定する件数」と「人間が読めばライセンスが書いてある件数」の差。", "does_not_measure": "ライセンスの法的有効性。PDL1.0 との整合。 パッケージ階層が空である原因が、府省庁の登録漏れなのかポータル側の実装なのかは判別できない。", "denominator": "全データセット（n=18253）", "missing_policy": "リソース0件（188件）と license_id が全て空（387件）は「（記載なし）」として 独立カテゴリで表示する。良い側にも悪い側にも寄せない。", "misread_warning": "isopen=False は「そのデータがオープンでない」という意味ではない。 ライセンス自体はリソース階層に記載されている。機械が読む場所に書かれていない、という事実のみを示す。 全23組織で一様に0件であり、個別組織の落ち度を示すものではない（原因未確認）。", "attribution": "undetermined" }, "format_ladder": { "id": "format_ladder", "name": "機械可読レベル（5段階ラダー）", "measures": "カタログに登録されたリソースの format 欄の値。データセット内で最良の形式で判定する。 段階は 5-star Open Data（Tim Berners-Lee）に準拠。", "does_not_measure": "ファイル中身の品質。CSVと書かれたファイルが実際に開けるか（format欄の自己申告を信じている）。 PDFがその資料の用途として不適切かどうか（報告書類はPDFが妥当な場合がある）。", "denominator": "全データセット（n=18253）", "missing_policy": "ZIP等の中身を開かないと判定できない形式のみ／format欄が空のものは「判定不能」バケットに置く。 機械可読の側に数えない（中身未確認のものを良い側に数えるのは、悪い側に数えるのと同種の捏造）。", "misread_warning": "組織ごとの数字の差は、業務の性質差を含む。報告書・答申が中心の組織はPDFが多くて自然である。 「PDFしかない＝オープンでない」と読まないこと。", "attribution": "dataset_owner" }, "freshness_measurability": { "id": "freshness_measurability", "name": "鮮度の判定可能性", "measures": "「このデータセットがいつのデータか」を、カタログのメタデータだけから機械的に判定できるかどうか。 判定材料の候補は metadata_modified と resources[].last_modified_date の2つ。", "does_not_measure": "データが古いかどうか。★ここは絶対に混同しない。 配布URL先のファイルは各省庁側で更新されている可能性があり、 カタログのメタデータがそれを写していないだけかもしれない。それも確認できない。", "denominator": "全データセット（n=18253）", "missing_policy": "3値論理。measured（測れた）/ missing（欠損）/ unmeasurable（構造的に測れない）。 欠損を分母から黙って除外しない。欠損を悪い値に丸めない。", "misread_warning": "鮮度スコアは作らない。「◯年更新されていない」という数字はこの指標からは出力できない。 metadata_modified はポータル側の更新日時であってデータの鮮度ではない （73.9%が2023年に集中＝data.go.jp から data.e-gov.go.jp への移行による一括更新の跡）。", "attribution": "undetermined" }, "update_frequency_declared": { "id": "update_frequency_declared", "name": "更新頻度の「宣言」と検証可能性のギャップ", "measures": "frequency_of_update 欄の記載率と、その表記ゆれ。 「1年」「１年」「Yearly」「少なくとも年１回」が併存する＝宣言が機械可読でないこと自体を測る。", "does_not_measure": "宣言どおりに更新されているかどうか。現時点では検証する手段が無い （定点観測が積み上がれば将来検証できるようになる。これがこのサイトを続ける理由のひとつ）。", "denominator": "全データセット（n=18253）", "missing_policy": "空欄は独立カテゴリとして件数と比率を表示する。", "misread_warning": "「更新しない」と宣言しているデータセットは、正直に宣言している。悪い数字として扱わない。 表記ゆれは記入者の落ち度ではなく、自由記述を許している入力設計の結果である。", "attribution": "dataset_owner_and_portal_operator" }, "org_breakdown": { "id": "org_breakdown", "name": "組織別ビュー", "measures": "組織ごとの件数、機械可読レベル分布、鮮度判定可能性、更新頻度の宣言率。", "does_not_measure": "府省庁の努力量・意図。メタデータから読めるのは結果だけ。 ★ライセンスのねじれ（license_twist）は組織別に出さない。 全組織が一様に0件であり、組織別に出すと府省庁の落ち度に見えるため。", "denominator": "各組織のデータセット件数（各行に n を必ず併記する）", "missing_policy": "欠損は独立カテゴリ。全23組織とも n>=150 のため小標本の秘匿処理は不要。", "misread_warning": "既定ソートは件数降順。悪い順を既定にしない。 組織差は業務の性質差（報告書中心か、統計中心か）を含む。", "attribution": "dataset_owner" }, "change_log": { "id": "change_log", "name": "変化（前回スナップショットとの差分）", "measures": "データセットの新規・消滅（id基準）、isopen の変化、ライセンス記載の変化、 機械可読レベルの遷移、リソースの変化件数。", "does_not_measure": "変化の原因・意図。", "denominator": "前回スナップショットと今回スナップショットの和集合", "missing_policy": "初回スナップショットでは差分を出力しない（観測開始点として1点だけ記録する）。", "misread_warning": "改善は悪化と同じ重みで報じる。 パッケージ階層に license_id が入れば isopen は 0% から跳ね上がる。それが起きたら最大のニュースとして扱う。", "attribution": "undetermined" } } }