Korea's Fertility Rate Falls Below One

Demographers use a benchmark called replacement: roughly 2.1 children per woman, the rate at which a population renews itself without help from immigration. South Korea has spent a decade sliding away from it and now sits below one child per woman — a figure with almost no precedent among large nations at peace. On current rates, a newborn Korean girl will have far fewer children than her mother's generation managed, and that generation was already below replacement.

The first chart sets Korea against the other charter members of the low-fertility club. Japan and Italy dipped below replacement decades ago and never returned, spending the 1990s as the world's cautionary tales. What stands out is how completely Korea has overtaken them; its rate is now well under theirs. China, its one-child policy long since abandoned, has quietly slipped below replacement too — proof that coercion was never the only force pushing births down.

Low fertility is a slow-motion problem; the bill arrives a generation late, when the age pyramid inverts. As the large mid-century cohorts retire, the share of people aged 65 and over climbs — past a quarter in Japan, with Italy close behind and Korea gaining fast. Fewer workers are left to fund more pensions, and the crowded, expensive cities that discouraged childbearing in the first place rarely become cheaper or roomier as they grey.

None of this is destiny. France and the Nordic countries have nudged their rates back up, and immigration can refill a labour force even as maternity wards empty. But no wealthy country has managed to coax fertility all the way back to replacement once it fell well below — and Korea has fallen further than any of them. It is simply the furthest along a road most of the rich world is already walking.

Korea did not run out of people. It ran out of babies — the same thing, with a thirty-year delay.