Yen Depreciation
The yen's 30%+ decline from 2022–2024 made Japanese real estate cheapest in USD/EUR terms in decades, drawing foreign capital predominantly to Osaka and Tokyo — the two most internationally-visible markets. This tailwind helped lift Osaka to the fastest five-year growth of any market (+48.8%). But the currency effect was one force among several: Fukuoka (+39.9%) appreciated nearly as fast without the same international profile, outpacing Tokyo (+24.0%) — so the weak yen amplified price gains broadly rather than concentrating them only in the headline cities.