Cosmetics · Marine ingredients
Deep Sea Water
海洋深層水 (Kaiyō shinsōsui)
Also known as: Ocean Deep Water
At a glance
| Category | Cosmetics |
|---|---|
| INCI name | Sea Water / Maris Aqua (for specific preparations) |
| Japanese labeling name | 海水 |
| Common Japanese notations | 海洋深層水, 深層水 |
| Origin | Marine (water drawn from ocean depths below 200 meters) |
| Typical functions | Mineral supply, Skin conditioning |
| Regulatory status in Japan | Cosmetic use is permitted under the JSCI dictionary as sea water. Beverage and food uses are regulated under the Food Sanitation Act. |
Deep sea water (海洋深層水, kaiyō shinsōsui) refers to ocean water drawn from depths typically below 200 meters. Several Japanese coastal regions — Kochi (Muroto), Toyama Bay, Okinawa (Kumejima, Miyakojima), and others — operate deep-sea-water intake facilities that supply both cosmetic and beverage applications.
Classification
Tags below link to other ingredients sharing the same attribute, so you can pivot from one ingredient to its peers.
Product applications
Functions
Regulatory tags
Used in (typical product categories)
Finished-product categories that commonly include this ingredient in Japanese-market formulations.
- Face toners and mists
- Body products
- Beverage and culinary applications (separate regulatory framework)
What it is
Deep sea water is drawn through offshore pipelines from depths below the thermocline. At these depths, water temperature is consistently cold, nutrient concentrations differ from surface water, and microbial content is significantly lower than surface seawater.
Processing varies by end use: for cosmetics, the water is typically desalinated and filtered; for food and beverage uses, various mineral-balance adjustments may be applied.
Typical uses in Japanese products
In cosmetics, deep sea water is used in face mists, toners, and mineral-supply positioning across skincare categories.
In beverages, it is sold as specialty drinking water and as a mineral-supplementation source.
Region-specific brands (Muroto, Kumejima, etc.) exist; cosmetic ingredient labels generally use generic terminology such as "deep sea water" or the INCI Sea Water, with regional provenance noted descriptively in product marketing.
Regulatory classification in Japan
Cosmetic use is permitted under the JSCI dictionary. Beverage use under Food Sanitation Act.
Regulatory classification in other markets
| EU | Sea water is listed in CosIng. Permitted for cosmetic use. |
|---|---|
| USA | INCI recognized by PCPC. |
| China | Permitted per IECIC listings. |
| Korea | Permitted under KFDA / MFDS. |
Example products
Example finished products will be added after each product's current full ingredient list has been verified. Regional deep-sea-water brands are handled as descriptive production-region notes rather than in ingredient names.
All brand names and product names referenced anywhere on this site are the property of their respective owners. Example entries are provided for informational purposes only and do not imply endorsement.
Related ingredients
References
- JSCI labeling name directory — 海水
- Ocean Deep Water Industry Association Japan
Last updated: 2026-04-22. Ingredient entries are reviewed at least annually against current regulatory listings.