{
 "id": "ogasurfproject/jccdb",
 "owner": "ogasurfproject",
 "name": "jccdb",
 "downloads": 491,
 "likes": 1,
 "last_modified": "2026-10-03T10:36:08.000Z",
 "stated_licence": "cc-by-4.0",
 "stated_from": "tag",
 "licence_name": null,
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 "file_licence": null,
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 "gated": false,
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 "citation": "@dataset{oga2026jccdb,\n  author    = {Oga, Toshikatsu},\n  title     = {Japan Construction Cost Database (JCCDB) v4.0},\n  year      = {2026},\n  publisher = {Zenodo},\n  doi       = {10.5281/zenodo.22127752},\n  url       = {https://github.com/ogasurfproject-jpg/japan-construction-cost-database},\n  note      = {95,403 items / 97 categories, CC BY 4.0 single licence.\n               Verified tier 43,090 (32,126 with per-item evidence URLs), Extended 52,313.\n               No price data. Per-file SHA-256 in JCCDB_v4_RELEASE_DECLARATION.md, anchored\n               to Bitcoin via the JIDEC ledger. Dataset DOI 10.5281/zenodo.22127752;\n               Zenodo 21898745 is the prior v3.1 dataset; the engrXiv DOI and Zenodo 20019573\n               are the accompanying papers, not the dataset.}\n}",
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 "reason": "The declared licence (cc-by-4.0) is classified as permissive.",
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}