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Natural Disasters in Japan: Essential Safety Guide for Foreign Residents

Shin Housing team

Japan is one of the most disaster-prone countries in the world — sitting on the Pacific Ring of Fire, it experiences frequent earthquakes, volcanic activity, typhoons, and occasional tsunamis. The good news is that Japan also has one of the world's most sophisticated disaster preparedness systems. As a foreign resident, knowing how it works can save your life.

Understanding Japan's Disaster Alert System

J-Alert (全国瞬時警報システム)
Japan's national emergency alert system broadcasts warnings through:

  • Smartphone emergency alerts (even without Japanese carrier SIM, these broadcast on compatible phones)
  • TV and radio interruptions
  • Outdoor loudspeakers
  • Municipal disaster prevention broadcasts

Alerts are issued for earthquakes (地震), tsunamis (津波), typhoons (台風), and missile threats. When your phone sounds the emergency alarm (a distinctive loud siren sound), take immediate action.

Seismic Intensity Scale (震度 / Shindo)
Japan uses its own earthquake intensity scale, different from the Richter scale:

  • Shindo 1–3: Minor shaking, mostly unnoticed or slight
  • Shindo 4: Noticeable shaking, objects may fall
  • Shindo 5 (weak/strong): Significant shaking, hard to walk, objects topple
  • Shindo 6 (weak/strong): Severe shaking, impossible to stand
  • Shindo 7: Maximum — violent shaking, structural damage

Disaster Apps You Should Install:

  • Safety tips app (Safety Tips): Official multilingual app by Japan Tourism Agency — provides real-time disaster alerts in English and 14 other languages
  • Yahoo! Weather Japan: Detailed typhoon and heavy rain tracking
  • NHK World: Emergency news and updates in English

Earthquakes: What to Do

Japan's most frequent disaster. Most earthquakes are minor, but preparation is essential.

During an earthquake:

  • Drop, cover, hold: Get under a sturdy desk or table. Cover your head and neck
  • If no table: Move to an interior wall, away from windows and heavy objects
  • Do NOT run outside during shaking — falling debris is the main danger
  • If cooking, turn off the gas if safely possible
  • In a high-rise building: Stay inside, the building is engineered to sway

After an earthquake:

  • Check for gas leaks — open windows, don't use electrical switches
  • Wear shoes immediately — broken glass is a hazard
  • Listen to official instructions via radio or smartphone
  • Do not use elevators
  • Be prepared for aftershocks

Tsunamis: Evacuation Priority

If you are in a coastal area and feel a strong earthquake or receive a tsunami warning:

  • Move to high ground immediately — do not wait for official confirmation
  • Evacuation routes are marked with blue tsunami signs throughout coastal communities
  • Do not return to the coast until all warnings are officially lifted

Typhoons: Prepare in Advance

Typhoon season runs June–October. When a typhoon is forecast:

  • Stock up on food, water (3 days minimum), batteries, and medications
  • Secure loose outdoor items (flower pots, bicycles, etc.)
  • Reinforce windows with tape if needed
  • Know your nearest disaster shelter (避難場所 / hinan basho)
  • Avoid going outside during the storm

Your Emergency Kit (非常用持ち出し袋)

Every household in Japan should have a "go bag" ready at all times:

Essential items:

  • 3-day supply of water (2 liters per person per day)
  • Emergency food rations (non-perishable)
  • First aid kit and medications
  • Copies of important documents (passport, residence card, insurance cards)
  • Flashlight and extra batteries
  • Portable phone charger (power bank)
  • Cash (ATMs may be down after disasters)
  • Whistle and emergency blanket
  • Change of clothes and sturdy shoes

Disaster Shelters (避難所)

Every municipality designates local disaster shelters — typically schools, community centers, and parks. Know where your nearest shelter is before disaster strikes.

How to find your shelter:

  • Ask your city hall or ward office for the local hazard map (ハザードマップ / hazard map)
  • Hazard maps are available free online at national and local government websites
  • The map shows flood zones, tsunami inundation zones, landslide risks, and shelter locations

Registering as a Foreign Resident for Disaster Support

Many cities offer disaster support registration for foreigners, elderly, and disabled residents. Contact your city hall to register — in an emergency, welfare workers will check on you.

Key emergency numbers:

  • 110: Police
  • 119: Fire / Ambulance
  • #7119: Emergency medical consultation
  • 0570-783-800: Japan Disaster Relief (J-DRAT) helpline

Preparation is the foundation of safety in Japan. Take 30 minutes this week to identify your evacuation routes, prepare your emergency kit, and download the Safety Tips app — your future self will thank you.