Japan

Tokyo tap water is treated to high standards and is safe to drink, use for brushing teeth, and for ice. If you have a very sensitive stomach, bottled water is widely available.

Osaka tap water is treated to high standards and is safe to drink, use for brushing teeth, and ice; choose bottled water only if you prefer the taste. Bottled water is inexpensive and widely available if you want convenience or familiarity.

Kyoto tap water is treated to drinking standards and is safe to drink and use for brushing teeth and ice; bottled water is optional for taste preferences. If you stay in very old wooden houses (machiya) with aged plumbing, consider using a simple filter or bottled water for peace of mind.

Nagoya tap water meets Japanese safety standards and is safe to drink, use for ice, and brush your teeth. Carry bottled water only if you prefer the taste or are staying in very old buildings with uncertain private plumbing.

Yokohama tap water meets national and international standards and is safe to drink directly; most visitors drink it without issue. Bottled or specialty mineral water is widely available if you prefer a different taste.

Tap water in Fukuoka meets national standards and is safe to drink; you can use tap water and ice with confidence. If you have a sensitive stomach, consider bottled or filtered water as a precaution.

Tap water in Sapporo meets Japanese safety standards and is safe to drink; use bottled water only if you prefer the taste or for long hikes. Carry a reusable bottle — many hotels, restaurants and stores offer refill options.

Tap water in Kawasaki is potable and safe for drinking, brushing teeth, and making ice; carry a reusable bottle to refill. If you are particularly sensitive to chlorine taste, bottled water or a small filter pitcher can improve flavor.

Excellent mountain spring water — drink freely from the tap.

Tap water in Saitama is potable and safe to drink, use for brushing teeth, and ice is generally safe; buy bottled water only if you prefer a specific taste or mineral water.

Hiroshima's tap water meets Japanese standards and is safe to drink — feel free to refill a reusable bottle from taps. Those with very sensitive stomachs can opt for bottled water, but filtration is generally unnecessary.

Sendai's tap water is treated and safe to drink; you can drink from the tap and use ice. If you prefer, bottled water is inexpensive and widely available.

Tap water in Chiba is treated to national standards and is safe to drink; most visitors and locals drink it straight from the tap. If you have an especially sensitive stomach, use bottled or filtered water as a precaution.

Tap water in Setagaya meets strict national standards and is safe to drink, use for brushing teeth, and for ice; some visitors notice a mild chlorine taste so use a personal filter if sensitive.

Tap water in Kitakyushu meets Japanese national standards and is safe to drink; you can refill bottles from taps in hotels and public spots. If you have a very sensitive stomach, bottled water is an easy alternative, but generally not necessary.

Tap water in Sakai is potable and safe to drink; you can use it for drinking, brushing teeth, ice, and washing produce. Carry a reusable bottle if you prefer, but bottled water is not necessary.

Niigata's tap water meets national and international standards and is safe to drink; bottled water is optional for personal preference. You can use tap water for brushing teeth, ice, and washing produce.

Excellent mountain spring water — drink freely from the tap.

Tap water in Nerima (Tokyo) is treated to high standards and is safe to drink — bottled water isn’t necessary unless you prefer the taste. Ice, brushing teeth, and washing produce with tap water are all generally fine.

Excellent mountain spring water — drink freely from the tap.

Tap water in Ōta-ku meets strict Japanese and international standards and is safe to drink; you may notice a mild chlorine taste. Use tap water for brushing teeth, ice, and washing produce without concern.

Tap water in Sagamihara is treated to national standards and is safe to drink; bring a refillable bottle if you prefer to avoid single-use plastic. If you have a very sensitive stomach, bottled water is widely available.

Okayama's tap water meets Japanese national standards and is safe to drink; bottled water is generally unnecessary. If you have a sensitive stomach, use bottled or filtered water as a precaution.

Tap water in Edogawa (Tokyo) meets strict national standards and is safe to drink — you can use it for drinking, ice, brushing teeth, and washing produce. Bottled water is widely available if you prefer a different taste or convenience.

Excellent mountain spring water — drink freely from the tap.

Tap water in Adachi (Tokyo) is treated to high standards and safe to drink; feel free to refill a reusable bottle. If you prefer, bottled water is widely available at convenience stores.

Generally safe to drink. If you're sensitive or staying in an older building, consider filtering for taste.

Excellent natural spring water — drink freely from the tap.

Tap water in Kawaguchi is treated and safe to drink for most visitors; you can drink it, brush your teeth with it, and use ice made from it. Bottled water is inexpensive and widely available if you prefer a different taste.

Tap water in Suginami (Tokyo) is treated to high standards and is safe to drink, use for brushing teeth, and make ice. Buy bottled water only if you prefer a particular taste or need a longer-lasting supply while sightseeing.

Itabashi (Tokyo) tap water is treated to high standards and safe to drink; most tourists can drink from the tap. If you prefer, buy bottled water for taste or convenience.

Tap water in Hachioji meets Japanese safety standards and is safe to drink, brush your teeth with, and use for washing fruit. Bottled water is inexpensive and widely available if you prefer.

Himeji's tap water meets Japanese drinking standards and is safe to drink and use for brushing teeth; bottled water is optional for taste preference. If you have a very sensitive stomach, consider bottled water for the first day while you acclimate.

Tap water in Koto-ku (Tokyo) is treated to high standards and safe to drink; most visitors can use tap water and ice without concern. If you are sensitive to a slight chlorine taste, consider bottled water or a small filter for drinking.

Tap water in Utsunomiya is safe to drink and use for food; carry a reusable bottle if you prefer chilled water. Ask for tap water in restaurants if you want it — many will provide it on request.

Excellent mountain spring water — drink freely from the tap.

Tap water in Ichikawa is treated to Japanese standards and is safe to drink and use for brushing teeth; carry a refillable bottle if you prefer tap water. If you are sensitive to taste, bottled water is widely available.

Matsudo's tap water meets Japanese and international standards and is safe to drink; some visitors may notice a mild chlorine taste, so bottled water or a filter can be used if preferred.

Tap water in Higashi-osaka is safe to drink and commonly consumed; carry a reusable bottle for convenience. If you prefer, bottled water is widely available at convenience stores.

Tap water in Nishinomiya-hama meets Japanese drinking standards and is generally safe to drink; most locals drink it. If you prefer, use bottled water or a small filter to avoid a mild chlorine taste.

Excellent mountain spring water — drink freely from the tap.

Kurashiki tap water meets Japanese standards and is safe to drink and use for brushing teeth; bottled water is widely available if you prefer bottled or flavored brands.

Excellent mountain spring water — drink freely from the tap.

Tap water in Fukuyama is treated to national standards and is safe to drink; you can use it for drinking, brushing teeth, and making ice. If you have a very sensitive stomach, bottled water is readily available but generally unnecessary.

Tap water in Katsushika-ku is treated to national standards and safe to drink; carry a refillable bottle. If you have a very sensitive stomach or are staying in an older private building, you may prefer bottled water as a precaution.

Tap water in Amagasaki meets Japanese safety standards and is safe to drink; bring a reusable bottle for convenience and buy bottled water only if you prefer a different taste or need it on the go.

Fujisawa's tap water meets Japanese safety standards and is safe to drink; use bottled water only if you prefer a different taste or are particularly sensitive to chlorine. Carry a bottle for beach days and long walks, but feel free to refill from taps in hotels and public fountains where offered.

Tap water in Machida is treated to high standards and is safe to drink; if you are sensitive to mild chlorine taste, consider bottled or filtered water.

Kashiwa's tap water meets Japanese safety standards and is safe to drink; you can drink from taps, use ice, and wash produce. Bottled water is widely available if you prefer its taste.

Excellent mountain spring water — drink freely from the tap.

Tap water in Toyota is treated to high standards and is safe to drink, use for brushing teeth, and for ice; bottled water is available if you prefer the taste.

Takamatsu's tap water meets Japanese national standards and is safe to drink; if you prefer a different taste, bottled water is inexpensive and widely available.

Tap water in Shinagawa (Tokyo) meets strict standards and is safe to drink; use it for brushing teeth, ice, and washing produce. If you prefer, bottled water is inexpensive and widely available.