Observed arrival · 2026-10-24
Kaukari maps Tokyo’s buy-or-rent math, ward by ward
A public comparison tool estimates monthly buying costs versus rent for small condominiums across Tokyo’s 23 wards, with selectable interest-rate assumptions.
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- Tokyo renters weighing a small condominium purchase
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- The comparison uses sale data for under-50㎡ condos built within 20 years; Adachi is omitted because the page lacks rent data.
Field notes
The ownership estimate combines principal-and-interest repayments with management and repair-reserve fees, modeled at ¥494 per square metre each month. Sale-price inputs are drawn from transactions for condos under 50㎡ and under 20 years old, while rent estimates come from residential J-REIT disclosures. The site cautions that those rents may skew high and excludes upfront purchase costs, property tax and future reserve-fee increases.
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○OpenPublic substance visible
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