nagayu.com

Nagayu USA is an online shop selling Japanese CO2 tablets and a shower head holder called the Supercharge Deluxe. Founded in 2016, the brand takes its name from Nagayu Onsen, a carbonated hot spring town in Oita, Japan. Its catalog covers beauty rituals, bath and shower use, spa applications, and a canine skincare line.

Tablets act as a final rinse: one is placed in the shower holder, where warm water activates a carbonated flow. Two formulas are offered, a coconut oil version for dry skin and a lactic acid variant with higher CO2 volume. The site's FAQ also covers bathtub soaks, spray mists, and ear-cleaning rinses for dogs.

Payments are processed by credit card. A 30-day return window applies to unused items in original packaging, while sale items are non-refundable and exchanges are limited to defective or damaged goods. Return shipping is the buyer's responsibility and is deducted from refunds; items over $75 are accompanied by a recommendation to use a trackable service. Returns are directed to a Lewes, Delaware address.