After a major disaster in Japan, store shelves empty within hours and deliveries can stop for days. Official guidance is to keep at least three days — ideally seven — of food and water at home for every member of your household. The good news is that Japan makes some of the best emergency food in the world, much of it tasty, compact, and shelf-stable for years. Here is what to stock, how much, and where to find it.
The main categories
アルファ米 (alpha rice)
Pre-cooked, dehydrated rice that you rehydrate with water (cold works, hot is faster). It comes in many flavors — plain, sekihan, takikomi, chicken rice — and typically keeps for about 5 years. Each serving runs roughly ¥300–¥400. Well-known brands include 尾西食品 (Onishi Foods) and サタケ (Satake). It is the backbone of most Japanese emergency food stocks.
缶詰パン (canned bread)
Soft, ready-to-eat bread sealed in a can, with a shelf life of around 3–5 years. No preparation, no water needed. パン・アキモト (Pan Akimoto) is the best-known maker. Great for variety and for children.
カンパン (hardtack biscuits)
The classic Japanese emergency cracker — dense, long-lasting, and calorie-rich. Inexpensive and extremely durable, often sold in cans with a small packet of candy for energy.
保存水 (long-life water)
Specially bottled water with a shelf life of 5–10 years, far longer than ordinary bottled water. Plan around ¥200 per 2-litre bottle. Aim for at least 3 litres of drinking water per person per day.
ようかん & calorie bars
Sweet red-bean ようかん (yokan) is compact, calorie-dense, and needs no preparation — Imuraya (井村屋) makes a popular emergency version with around a 5-year shelf life. カロリーメイト and similar bars are another easy, balanced source of calories.
How much do you need?
A simple rule:
- Minimum 3 days, ideally 7 days, of supplies per person.
- 3 meals plus 3 litres of drinking water per person per day.
- So a family of 2 for 7 days needs about 42 meals and 42 litres of water — roughly ¥15,000–¥25,000 for a complete stock, depending on what you choose.
For an exact shopping list sized to your household — including water, food, and the rest of your kit — use our Kit Builder.
The smart way to stock: rolling stock (ローリングストック)
Rather than buying special food that sits until it expires, the rolling-stock method has you keep a little extra of foods you already eat — retort curry, canned goods, instant noodles, bottled water — and continually use the oldest and replace it. Your emergency stock stays fresh, familiar, and never wasted. Combine it with a core of long-life items like alpha rice for the best of both.
Alpha rice variety pack
A multi-flavor set of 尾西 (Onishi) alpha rice is an easy way to build the core of your stock with around a 5-year shelf life.
Find alpha rice sets on Amazon →Canned bread set
Ready-to-eat bread with a multi-year shelf life — no prep, no water, easy for kids.
Find canned bread sets on Amazon →5-year long-life water (保存水)
Bottled water made to last 5 years or more — stock enough for at least 3 litres per person per day.
Find long-life water on Amazon →Complete 3-day emergency food set
An all-in-one set covering several days of meals is the fastest way to get prepared in a single purchase.
Find complete emergency food sets on Amazon →Where to buy
- Online: Amazon and Rakuten. The widest selection of brands, sets, and bulk packs, delivered to your door.
- Home centers such as カインズ (Cainz) and コーナン (Kohnan) carry emergency food and supplies year-round.
- Convenience stores and supermarkets often run disaster-prep sections, especially around September 1 (防災の日, Disaster Prevention Day) in late August and September.