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Analyzing 40 Years of Japanese Public Open Data in 3 Minutes with DuckDB (No API Keys, In-Memory Parquet)

This story is from 2026-10-15. It is preserved in the archive; the latest stories are on the live feed.

The Hidden Goldmine (and Nightmare) of Japan's Open Data Japan’s government ministries publish massive amounts of open public data: Multi-billion-dollar national procurement contracts (Digital Agency / GEPS) 44-year historical nationwide land valuation benchmarks (MLIT) Over 5 million corporate reg…

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  1. 2026-10-15 01:11 · DEV Community — AI
    Analyzing 40 Years of Japanese Public Open Data in 3 Minutes with DuckDB (No API Keys, In-Memory Parquet)

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