Safety & PracticalitiesBy Clever Tourists · Published
Yes. Tap water in Japan is safe to drink in cities, towns and hotels, and you can fill a bottle straight from the bathroom or kitchen tap. World Travel Guide states that "tap water is safe for consumption" in Japan, and Japan's national tourism organisation, JNTO, says it is regulated under national drinking-water standards and is served free in restaurants (the same point is in our Japan things to know page). We were in Japan from March to April 2023, from Tokyo through Kyoto and Osaka to Hiroshima, and the practical question is rarely safety. It is where to refill, what to avoid in the mountains, and how not to buy more plastic than you need.
• Tokyo, Osaka, Kyoto and every other city and town: drink it from the tap. Hotels, hostels, ryokan and guesthouses are all on the same municipal supply.
• Restaurants and izakaya: a glass of water, often with ice, arrives with the menu at no charge in most places. Asking for o-mizu is normal and not rude.
• Mountain huts and remote hiking: water from streams and springs is not tap water, so treat or carry your own. Streams are an animal-contamination risk anywhere in the world; the CDC's Japan page lists leptospirosis from water contaminated by animal urine as a risk, with the advice to avoid contaminated water and floodwater.
• Public toilets and onsen bathing water: wash your hands there, but hot spring water is not drinking water unless a sign clearly says so.
Japan's water supply is run by municipal waterworks under national standards, and the CDC's Japan page, which is general in tone, does not list tap water as a traveller risk. We could not find a single-sentence official line on the JNTO safety page itself, so the reassurance above rests on World Travel Guide and the JNTO statement quoted in our own guide, which is why we say it plainly but do not give test numbers.
The reservation is taste, not safety. Tap water in some cities has a faint chlorine smell, and older buildings with rooftop tanks can taste flat. If you dislike it, a filter bottle or a chilled bottle from a vending machine solves it. Running the tap for ten seconds in a building that has been empty for days is sensible anywhere.
In a typical Japanese restaurant the staff put a glass or small pitcher of cold water in front of you before you order. At standing noodle counters and ramen shops there is often a water dispenser on the counter or a pitcher you pour yourself. At an izakaya, water arrives free when you ask. Only some bars and high-end restaurants offer sparkling or bottled water and charge for it, and when they do the menu says so.
You do not tip for water, and in Japan you do not tip at all; our Japan and South Korea tipping guide explains the one exception to watch for, which is a seating or service charge that appears on the bill at some izakaya.
Japan is easy to hydrate in, which is the real reason many visitors never touch the tap. Vending machines every few hundred metres sell chilled and, in cooler months, heated bottles of water and tea. Convenience stores such as 7-Eleven, Lawson and FamilyMart stock water, tea and sports drinks; see our convenience store guide for what to buy there.
A refillable bottle still saves money. Most hotel lobbies, many train stations and some tourist sites have drinking fountains or filtered water coolers, and large supermarkets sell bottled water in multipacks that are cheaper per litre than vending machines. Ask a hotel desk before assuming there is no refill point, especially at a ryokan.
Ice in Japan is made from the same municipal supply, so ice in drinks is safe. Brushing your teeth with tap water is fine. If you have a sensitive stomach it is more likely to be bothered by new foods or a time change than by the water.
Hot tap water can come from a boiler or a tank in some old accommodation. Cold water is the one to drink.
Japan's main water risk is a disaster, not the supply. After a major earthquake or typhoon, local governments hand out water and sometimes ask residents to boil tap water until testing is complete. If you are in an affected area, follow the municipal and hotel announcements, and keep a litre or two of bottled water in the room. Our Japan packing list covers the other things worth having in the bag.
Japan's heat and humidity in July and August make hydration a bigger concern than water quality; carry a bottle and refill it often.
Yes. Tokyo, like the rest of Japan, runs its tap water under national drinking-water standards, and World Travel Guide says tap water is safe for consumption. You can drink it from the hotel tap.
Yes, nearly always. A glass of water, usually cold, comes to the table or from a self-serve dispenser at no charge, and you do not tip for it.
Yes. The water is the same as the drinking supply, so brushing and rinsing are fine.
No, not unless a sign says so. Onsen bathing water is for soaking, not drinking, and the same goes for streams and springs in the mountains.
Yes, a refillable one. Tap water is safe, vending machines are everywhere for when you do not want to refill, and a bottle cuts how much plastic you buy during the day.
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