10 Best Japanese Bath Additives to Buy in Japan

Yuzu is a classic from Kao's long-selling bath brand 'Bub.' Since its debut in 1983 it has been a beloved fixture of Japanese bath culture. Drop one tablet into the tub and it fizzes as carbon dioxide dissolves into the water.

The carbonation, together with warming ingredients like magnesium sulfate, warms you gently to the core. As a quasi-drug it's welcome for fatigue, stiff shoulders and sensitivity to cold, making it perfect for unwinding at the end of the day.

Wrapped in a fresh yuzu scent, it leaves you feeling refreshed. The water feels light rather than sticky, and being mildly acidic it's gentle enough for the whole family.

Individually wrapped, light, and affordable even in a 20-tablet box, it's great for buying in bulk as a souvenir with a distinctly Japanese scent. The wide range of scents — forest, hinoki cypress, lavender and more — is another plus.

Among the 'Kikiyu' bath series, this Calcium Carbonate type is the one to reach for when fatigue or stiff shoulders bother you. It comes as granules that fizz and dissolve the moment they hit the water, which is part of the fun.

Carbon dioxide and calcium carbonate boost the warming effect, heating you gently from the core. As a quasi-drug it's welcome for fatigue, stiff shoulders and sensitivity to cold — ideal for anyone who wants a long, slow soak.

It also contains zinc as a moisturizing ingredient. The scent is a fresh ramune soda, and the water turns a clear sky-blue.

The after-bath feel is crisp and refreshing, so it's easy to use even in sweaty seasons. Besides the bottle with a measuring scoop and refills, there are also single-use sachets, handy for handing out as souvenirs.

With a rich range of scents and formulas, you can pick one to match your mood.

Its highlight is that one box brings together four yuzu scents. Juicy 'fresh-picked yuzu,' sweet 'ripe yuzu,' gentle 'cozy yuzu' and slightly bitter 'bittersweet yuzu' — pick a scent to match your mood.

The fragrance uses oil extracted from 'Kito yuzu' grown in Tokushima Prefecture for an authentic yuzu aroma. Carbon dioxide and hot-spring ingredients boost the warming effect and heat you from the core; as a quasi-drug it's welcome for fatigue, stiff shoulders and sensitivity to cold, with warmth that lingers after your bath.

It also contains moisturizing ingredients derived from kudzu root and ginger. Each tablet is individually wrapped, light and compact, and the Japanese yuzu scent makes it great as an amenity or small souvenir.

Best of all, it's affordable at any drugstore.

From Kracie's bath brand 'Tabi no Yado,' this assortment evokes famous hot springs across Japan. One box holds several individually wrapped bath additives modeled on famous hot-spring towns, so you can enjoy a 'spring-hopping' tour by mood.

There are milky cloudy types and clear translucent types, and the fun is in savoring the different colors and scents. A quasi-drug with hot-spring-derived moisturizing and aroma ingredients, it's welcome for fatigue, stiff shoulders and sensitivity to cold.

It warms you from the core and keeps you cozy afterward. You simply dissolve the powder — easy to use.

The individual packets are light and compact, an easy way to take Japan's hot-spring culture home, perfect as a souvenir. Affordable and easy to keep using, it's a long-standing classic.

Popular among beauty lovers and often chosen as a gift, this is a step-up bath product. A quasi-drug inspired by the rare 'neutral bicarbonate spring' found at German spa-therapy towns, its hallmark is bicarbonate ions that stay dissolved in the water for a long time.

It boosts the warming effect and heats you from the core, welcome for fatigue, stiff shoulders and sensitivity to cold. The water takes on a mellow, silky feel, perfect for nights when you want a long soak.

With a simple fragrance-free, color-free formula, it suits those who dislike scent or color, as well as sensitive skin and even babies. The recommended way to use it is to dissolve the tablets in lukewarm water and soak slowly for 15 minutes or more.

It even rinses away excess sebum. A bit pricey, but well known and easy to give to anyone, so it works for a special souvenir or gift.

Among the German-born bath-salt brand 'Kneipp,' this is a popular pick for before bed. Though an overseas brand, it's a staple in Japanese drugstores and variety shops and has long ranked high in bath-product reviews.

'Gute Nacht' means 'good night' in German. The hops and valerian it contains are plants long known in Europe as 'herbs for before sleep.' Made from natural rock salt and natural herbal essential oils, it turns the water a deep blue when dissolved.

Wrapped in a calm, slightly spicy herbal scent, it's perfect for nights you want to wind down. A rich range of scents is part of Kneipp's appeal, from 50g sachets to large bottles.

The sachet type is handy and light, an easy pick for anyone hunting spread-around souvenirs at a Japanese drugstore.

From Bathclin, a long-established Japanese bath brand, this bath salt is devoted to natural essential oils. Over 95% of its ingredients are naturally derived, and a perfumer's blend delivers an authentic scent.

Scents include Lemongrass & Bergamot, Chamomile & Clary Sage, Frankincense & Sandalwood and Cedarwood & Geranium, and the appeal is that you can pick one to suit your mood or moment. It contains 'α-pinene,' an aroma component found in pine and hinoki, for a relaxation-focused scent that makes you want to breathe deeply.

It uses natural sea salt from Shark Bay, an Australian World Heritage site, plus plant-derived moisturizers, so you stay comfortably moisturized after the bath. The refined scent lingers gently until after you bathe, perfect for a reward bath at the end of the day.

With single-use sachets and an assortment set to try four scents, it's easy to pick for sampling or gifting.

From the popular Japanese serum brand 'unlabel,' this beauty-focused bath tablet is built around the concept of 'bicarbonate beauty before bed,' proposing a reward bath for a hard-working you. Drop it in and the large tablet fizzes vigorously as it dissolves, turning the water a pretty milky yellow.

Wrapped in a fresh meditation-herb scent, it's perfect for nights you want to relax. Containing beauty ingredients such as a vitamin C derivative, it smooths the skin after your bath — a hallmark of a skincare brand.

The water takes on a mellow feel. Each tablet is individually wrapped, with a stylish paper package.

Available in a 6-tablet box or singly, it's great for trying out or handing over as a chic little gift.

From Ishizawa Laboratories' bath brand 'Onsen Nadeshiko,' this medicated bath additive focuses on rice. As you'd expect from a brand known for rice sheet masks, its hallmark is the distinctly Japanese theme of 'rice'.

With hot-spring minerals plus rice-bran-derived moisturizers, the water turns a gentle milky white. A calm, Japanese-style floral scent is another draw.

The water feels smooth, and your skin is soft and supple afterward. It's perfect for seasons when dryness and rough skin are a concern.

As a quasi-drug containing hot-spring minerals, it's also welcome for fatigue, stiff shoulders and sensitivity to cold, letting you enjoy a hot-spring mood at home. Easy on the wallet and light at one sachet each, with the very Japanese theme of 'rice,' it's ideal as a spread-around souvenir.

A rich lineup including baking-soda and salt types makes it fun to choose by scent or preference.

From the popular Japanese brand 'YOLU,' known for its night-care shampoo, this is a bath tablet. Built on the concept of 'relaxation before bed,' it's perfect for the hours you want to unwind at night.

Drop it in and it fizzes as it dissolves, turning the water a silky purple cloudy bath. The water is so beautifully opaque you can't see your hand through it — a sight that lifts the mood.

The calm scent of chamomile and hyacinth is designed for nighttime relaxation and lingers gently until after you bathe. With moisturizing and beauty ingredients such as night ceramide and silk extract, your skin is smooth and supple afterward.

The large tablets are individually wrapped, available in a 6-tablet box or singly. Stylish in both look and scent, it's perfect for a reward bath or to give as a little gift.