Tokyo is in a league of its own
Among Japan's big cities, a used condo in Tokyo runs about ¥1.13M per square meter — roughly 4.3× Sapporo (¥265k). Even Osaka, the clear #2, is only about 64% of Tokyo. The capital isn't leading the pack; it's in a different race.
The takeaway: every other big city in Japan is a fraction of Tokyo per meter.