關東
地震風險：very-high
Tokyo Metropolis 地震風險
Tokyo is directly in the zone of a Tokyo Metropolitan Earthquake (M7 class, 70% probability in 30 years). The densely packed wooden housing districts present a major fire propagation risk. Underground infrastructure — subways, utility networks — is another critical vulnerability.
主要斷層・地震帶
The Philippine Sea Plate subducts beneath Tokyo at roughly 70 km depth. Multiple active faults run beneath the urban area — Tokyo Bay North Fault, Edogawa Fault, and others. Densely packed wooden housing districts in Adachi, Arakawa, and Sumida wards face extreme fire propagation risk after a major earthquake. The 1923 Great Kanto Earthquake (M7.9), which originated on the Sagami Trough, killed over 105,000 people, predominantly in fires.
主要斷層線
도쿄만 북부 단층 에도가와 단층 스탠딩워터 단층 사이타마 단층계