Free Due Diligence Utilities

Japanese Property & Akiya Due Diligence Tools

Quick, zero-login calculators to evaluate Japanese building codes, road compliance, and land liabilities before you make an offer.

Live Tool

Calculate required land surrender (setback area in m² and tsubo) for narrow roads under Article 42 Paragraph 2 of the Building Standards Act.

Live Tool

Step-by-step decision tree to check whether flag-lot or alley properties meet legal frontage requirements.

Live Tool

Check if a rural property permits residential reconstruction without special prefectural governor permits.

Have a live listing from Suumo or Athome?

Run our Full AkiyaCheck Scanner to analyze zoning, hazard zones, and generate city hall scripts automatically.