Japanese Real Estate Glossary
Zoning & Building Rules

二項道路

nikō dōroにこうどうろ

Deemed road (Art. 42-2)

A road narrower than 4 meters that predates the modern law but is treated as a qualifying road under Article 42, Paragraph 2 of the Building Standards Act — hence the name. Lots on a deemed road are buildable, but rebuilding triggers the setback obligation. Much of old urban Japan fronts these roads.

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