One city, a 3.3× price gap
A used condo in Minato — Tokyo's priciest ward — runs about ¥1.96M per square meter. The same square meter in Adachi, the cheapest of the 23, costs about ¥600k — roughly 3.3× less. Both addresses say "Tokyo." They are not the same purchase.
The takeaway: the ward you pick swings the price 3.3× before you've seen a single floor plan.