50 Yen - Heisei

The 50 yen coin survived Japan's 1989 consumption tax introduction largely by accident of denomination — the 3% tax on a 100 yen purchase produced a 3 yen remainder that no coin could make change for cleanly, driving demand for smaller denominations into chaos until the tax rate shifted. The holed design, unchanged since 1959, made the coin immediately distinguishable by touch in vending machines, which by the late Showa period had become one of the primary drivers of mint volume decisions.

Heisei-era mintages swung dramatically with economic conditions, bottoming out in the deflationary years of the late 1990s when collector sets absorbed a larger share of production than circulation did.