Tokyo operates under the Building Standard Law (Kenchiku Kijun Hou) administered by the Tokyo Metropolitan Government. The Building and Construction Division manages approvals with typical timelines of 3-8 weeks. Tokyo has a metropolitan population of approximately 37.4 million. Tokyo is in Seismic Zone III with stringent earthquake-resistant design requirements due to high seismic activity. Notable requirements include base isolation or damping systems, fire separation standards, and wind load resilience. Approval fees vary by project type, typically 0.4-0.8% of construction value. Tokyo offers expedited approval for sustainable projects and has established world-leading standards for earthquake-resilient design.