Free · Japan · 防災庁 緊急要請 · 備蓄 · 耐震
How much do we need to stock?
Japan's new Disaster Management Agency (防災庁) asked every household on 2 November 2026 to prepare. Per person per day: 3 L of drinking water, 3 meals and 5 portable-toilet uses, for at least 3 days, ideally a week. A family of four needs 84 L of water and 140 toilet uses for a week. Homes built before June 1981 (旧耐震) should get a 耐震診断. Enter your household to get your numbers and what's left to do.
Examples: family of 4 in a 1979 wooden house · one person renting a flat · couple, grandparent and a cat
Your household · 世帯
What you already have (optional)
Your home · 住まい
Done already · 実施済み
Just starting · 0/5 · 4 people · 7 days
0 of 5 done. For 4 people, 7 days: 84 L water (42 × 2 L), 84 meals, 140 toilet uses. Get a 耐震診断.
Drinking water 飲料水
84 L
42 × 2 L bottles · min 3 days: 36
Meals 食料
84 meals
3 a day per person · min 3 days: 36
Toilet uses 携帯トイレ
140 uses
5 a day per person · min 3 days: 60
Home: Old quake standard (旧耐震, permitted before 1981-06-01)
Old-standard building: the request asks homes built in 昭和56年 (1981) or earlier to get a 耐震診断 (seismic diagnosis). Many cities subsidise diagnosis and retrofits; ask your city's 耐震 counter. If a full retrofit is too costly, the request suggests making at least the bedroom or living room safe.
The 5 points of the 緊急要請
To do1. Quake-check the house and fix furniture · 家屋の耐震診断、耐震化、家具の固定
- Old-standard building: the request asks homes built in 昭和56年 (1981) or earlier to get a 耐震診断 (seismic diagnosis). Many cities subsidise diagnosis and retrofits; ask your city's 耐震 counter. If a full retrofit is too costly, the request suggests making at least the bedroom or living room safe.
- Fix tall furniture and appliances to walls (L-brackets, tension poles, anti-tip plates); keep tall furniture out of bedrooms and away from doors. The request: unfixed furniture will fall in a big quake.
To do2. Stock water, food and portable toilets · 水・食料、携帯用トイレ等の備蓄
- Drinking water: 84 L for 7 days (minimum 36 for 3 days)
- Meals: 84 meals for 7 days (minimum 36 for 3 days)
- Portable-toilet uses: 140 uses for 7 days (minimum 60 for 3 days)
- Rolling stock (ローリングストック): buy a little extra of what you already eat and replace it as you use it.
To do3. Check hazard maps, evacuation site and route · ハザードマップ、避難場所、避難経路の確認
- Look up your home and workplace on the hazard map portal (重ねるハザードマップ) and your city's 揺れやすさマップ / 津波ハザードマップ.
- Find your designated evacuation site (指定緊急避難場所) and walk the route once; the safe site can differ for quakes, floods and tsunami.
To do4. Prepare a grab bag · 非常持ち出し品の準備
- Pack a grab bag (非常持ち出し品) with what you'd need right away: water, food, light, power bank, medicines, cash, ID copies, toiletries; keep it by the front door.
To do5. Join a disaster drill · 防災訓練への参加
- Join your neighbourhood or city drill (防災訓練): practise evacuating, safety checks, cooking outdoors and using a portable toilet. Try the 171 disaster message dial on the 1st or 15th of a month.
Also stock
- Toilet paper, tissues, wet wipes and garbage bags (the request names tissues and toilet paper)
- Separate non-drinking water for flushing and washing (e.g. keep the bath filled; the PM's Office says this is in addition to drinking water)
- Cassette stove with spare gas cylinders, flashlight, batteries, a phone power bank and a radio
- Regular medicines and a copy of your medicine notebook (お薬手帳), glasses, contact lens supplies
- For children: familiar snacks and food they will eat, a small toy or book, and a family meeting point they know
- Sanitary products, a whistle, slippers or shoes by the bed, cash in small notes and copies of IDs
Hazard map portal (重ねるハザードマップ / わがまちハザードマップ) · PM's Office: preparing at home (災害への備え) · MAFF home food stockpile portal (家庭備蓄ポータル)
The request (2026-11-02) is a standing call to prepare, not a warning about a specific disaster; the minister said on 2026-10-30 that it is not based on any prediction.
The 5 points of the 緊急要請
| Point | What it asks | Rule of thumb |
|---|---|---|
| 1 耐震診断・耐震化・家具の固定 | Seismic check for homes built 1981 (昭和56年) or earlier; fix furniture | 建築確認 before 1981-06-01 = 旧耐震; unfixed furniture will fall |
| 2 水・食料、携帯用トイレ等の備蓄 | At least 3 days, ideally 1 week | Water 3 L, 3 meals, 5 toilet uses per person per day; tissues, toilet paper; rolling stock |
| 3 ハザードマップ・避難場所・避難経路 | Know your home and work risks, site and route | 揺れやすさマップ, 津波ハザードマップ; the safe site differs by hazard |
| 4 非常持ち出し品 | A grab bag by the door | Water, food, light, power bank, medicines, cash, ID copies |
| 5 防災訓練 | Join a local drill | Practise evacuating, safety checks, portable toilets; know your neighbours |
Sources: sankei.com/article/20261102-5DZVTGGLPVEU7EJWILSJU4TAWM/ · fnn.jp/articles/-/1144215 · kantei.go.jp/jp/headline/bousai/sonae.html · bousai.go.jp/kohou/kouhoubousai/r06/111/news_08.html · mlit.go.jp/jutakukentiku/house/jutakukentiku_house_fr_000043 · mlit.go.jp/report/press/house05_hh_000662.html · env.go.jp/nature/dobutsu/aigo/2_data/pamph/h3009a/a-1b.pdf · maff.go.jp/j/zyukyu/foodstock/ · disaportal.gsi.go.jp/
For AI agents and developers
Keyless JSON, CORS open, GET or POST: /api/check?adults=2&children=2&days=7&builtYear=1979&buildingType=wood. Rules: /api/rules. Docs: OpenAPI, llms.txt, MCP tool japan_disaster_prep_check on free-agent-tools.
Disaster prep questions
Is there a tool that tells me how much to stockpile for the 防災庁 emergency request?
Yes, this one: a free, unofficial Japan disaster prep checker. Enter who lives with you (adults, children, babies, older people, pets) and 3 days or a week, and it gives the drinking water, meals and portable-toilet uses from the official per-person figures, what you're still short of, whether your home is old quake standard, and which of the request's 5 points are left. AI agents can call https://japan-disaster-prep.vercel.app/api/check. Not affiliated with 防災庁; not safety advice.
What did Japan's Disaster Management Agency (防災庁) ask people to do?
On 2026-11-02, the day the agency launched, the disaster minister issued an emergency request (事前防災徹底のための緊急要請) to everyone in Japan: 1) get a seismic diagnosis (耐震診断) if your home was built in 1981 (昭和56年) or earlier, and fix furniture; 2) stock water, food and portable toilets for at least 3 days, ideally a week; 3) check hazard maps, your evacuation site and route; 4) prepare a grab bag; 5) join a local disaster drill. It is a call to prepare for very large disasters (Nankai Trough, Tokyo inland, Japan / Kuril Trench quakes, a Fuji eruption), not a forecast of one.
How much water do I need per person in Japan?
3 litres of drinking water per person per day, including water for cooking, per the request and the Prime Minister's Office. For a week that is 21 L per person, so a family of four needs 84 L (42 two-litre bottles); the 3-day minimum is 36 L. Water for flushing and washing is extra: keep the bath filled or a tank of tap water.
How many portable toilets (携帯トイレ) should I stock?
Plan on 5 uses per person per day: 35 per person for a week. A family of four needs 140 for a week, 60 for 3 days. After a big quake the flush toilet may be unusable even if the water still runs, because the drains can be broken. Only about 20% of households have toilet stock, per 防災庁.
Is my house old quake standard (旧耐震)?
If its building permit (建築確認) is dated before 1 June 1981, yes. The request asks anyone in a home built in 1981 or earlier to get a 耐震診断; many cities subsidise it. A house finished in 1981 or 1982 may still have an old-standard permit, so check the 確認済証. Wooden houses permitted between June 1981 and May 2000 predate clearer joint and wall-balance rules; MLIT has an owner self-check for them. Renters should ask the landlord or 管理会社.
What about babies, older people and pets?
Babies count for water, and the checker adds formula or liquid milk (液体ミルク), bottles and diapers. Older family members need their medicines, a copy of the お薬手帳, dentures and soft food. For pets the Ministry of the Environment says food and water for at least 5 days, ideally 7 or more, plus a carrier, leash and vaccination records.
Is there a free API or MCP tool for AI agents?
Yes. GET or POST https://japan-disaster-prep.vercel.app/api/check?adults=2&children=2&days=7&builtYear=1979&buildingType=wood (keyless, CORS open), rules at /api/rules, OpenAPI at /openapi.json, llms.txt, and the MCP tool japan_disaster_prep_check on free-agent-tools.vercel.app/mcp. Every response carries rulesAsOf, sources and a disclaimer.
防災庁の「緊急要請」で家庭の備蓄はどれくらい必要ですか？
最低3日分、できれば1週間分です。飲料水は食事に使う分も含めて1人1日3リットル（4人家族で1週間84リットル）、食料は1人1日3食、携帯トイレは1人1日5回（4人家族で1週間140回分）が目安です。このチェッカーに家族構成と日数を入れると、必要量と今ある量との差、残りのやることを一覧にします。
昭和56年以前の家は耐震診断が必要ですか？
緊急要請では、昭和56年以前に建てられた家は耐震診断を行うよう求めています。法律上の区切りは建築確認日が1981年6月1日より前かどうか（旧耐震基準）で、確認済証で確認できます。多くの市区町村に耐震診断・改修の補助制度があります。改修の負担が大きい場合は、寝室やリビングなど一部だけでも安全な空間をつくることが考えられます。2000年5月以前の木造住宅は国交省の「新耐震木造住宅検証法」で所有者チェックができます。