Immerse Yourself in Nature’s Bounty with Izu Seawater Bath Salt

Izu Seawater Bath Salt is crafted from the crystal-clear saltwater found in wells near the ocean floor of Izu Oshima, where rain and seawater have filtered through layers of lava and volcanic ash over time, condensing nature’s blessings. Abundant natural minerals are naturally present in this pristine saltwater. Handmade using salt extracted from this source and infused with natural herbs, it dissolves smoothly in your bath, releasing a wave of rich natural minerals and the vibrational energy of handcrafted natural salt into your tub. Customize your bathing experience by selecting scents to match your mood and promote perspiration according to your daily needs.

— Usage Instructions —

・Simply place the bag directly into your bathtub without opening it.
・Add one bag to a standard household bath (approximately 180-200 liters) and mix well.
・Pair with Onsen Powder from the Onsen Box for an even more luxurious hot spring experience.

Customer Reviews


“As I soak in the bath, I feel a deep connection with nature, receiving the Earth’s energy.”

“After use, I repurpose the remaining herbs as a deodorizer.”

“The natural aroma is incredibly soothing.”


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