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Japan: The Aging Archipelago — density × median age

demography.wtf · 935 words · saved by 2 readers

Every inhabited 250-metre cell of Japan, its brightness set by population density and its color by the median age of the people who live there. The cities glow young and blue. The countryside burns old and red. Color is the median age of the census block each cell belongs to, computed from 5-year age counts: cyan-blue below the national median, parchment at 48.5, deepening orange and red beyond 55. Brightness is density on a log scale, so metro cores blaze while a mountain hamlet of thirty households still registers as an ember. This is why the map reads like a night photograph: population is the light. The full 250 m render — 11,010 × 10,026 px — served as a lossless PNG tile pyramid. Drag to pan, scroll or pinch to zoom, double-click to dive, and click any place for the exact 2020-census age pyramid of that census block — the same counts that set the cell's color. Same scale of color everywhere. Three metropolitan cores against three stretches of regional Japan. Group every inhabited

Japan: The Aging Archipelago — density × median age Japan · 2020 census · 250 m mesh · 126,146,090 people United States map → · World map → by Casey Handmer + Fable The Aging Archipelago 高齢化列島 — population density × median age Every inhabited 250-metre cell of Japan, its brightness set by population density and its color by the median age of the people who live there. The cities glow young and blue. The countryside burns old and red. 48.3 national median age, population-weighted — among the oldest on Earth 46.8 median age where density exceeds 4,000/km² — home to 66% of all Japanese 59.5 media

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