Cosmetics · Marine ingredients
Deep Sea Water
海洋深層水 (Kaiyō shinsōsui)
Also known as: Ocean Deep Water
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| 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.
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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
Common OEM product categories
Finished-product categories where Japanese OEM manufacturers commonly formulate with this ingredient.
- Face toners and mists
- Body products
- Beverage and culinary applications (separate regulatory framework)
Ingredient profile
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.
OEM applications
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. |
Market reference formulations
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.
Alternative ingredients
Related ingredients commonly evaluated as substitutes.
Quick answers
- What is Deep Sea Water?
- 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.
- What is the regulatory status of Deep Sea Water in Japan?
- Cosmetic use is permitted under the JSCI dictionary as sea water. Beverage and food uses are regulated under the Food Sanitation Act.
- What products typically use Deep Sea Water?
- Face toners and mists / Body products / Beverage and culinary applications (separate regulatory framework)
- Where does Deep Sea Water come from?
- Marine (water drawn from ocean depths below 200 meters)
- What is the INCI / JSCI labeling name for Deep Sea Water?
- INCI: Sea Water / Maris Aqua (for specific preparations) / JSCI: 海水
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Sharing similar functions
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From the same origin
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Manufacturers mentioning this ingredient
Japanese OEM factories whose published profile references this ingredient. Auto-detected from manufacturer descriptions; verify capabilities directly.
Regulatory guidance
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FAQ for OEM buyers
Q. What INCI name is appropriate for deep sea water?
The standard INCI is 'Sea Water' (also 'Maris Aqua'), which covers seawater regardless of depth. 'Deep sea water' is a marketing descriptor; the underlying INCI on the label remains Sea Water/Maris Aqua. Specific regional provenance (e.g., Murotomisaki, Kumejima, Toyama Bay) is communicated as marketing claim, not INCI.
Sources · Last reviewed: 2026-04-26
- CosIng database — Sea Water / Maris Aqua entry
Q. What is the practical definition of 'deep sea water' (kaiyō shinsōsui) in Japan?
There is no single statutory definition, but industry convention defines it as seawater drawn from depths typically below 200 m (often >300 m) where light does not penetrate. Major Japanese DSW intake sites are operated under prefectural cooperation in Kōchi (Murotomisaki), Okinawa (Kumejima), Toyama, and Hokkaido.
Sources · Last reviewed: 2026-04-26
- Japan Deep Ocean Water Applications Society (DOWAS) — industry definition
Q. What functional/marketing claims are typically made about DSW?
Common claims center on natural mineral content (Mg, Ca, K, trace minerals), low surface microbial load, and stable temperature. Hard claims about specific physiological effects on skin should be supported with study data, as both Japanese and EU regulators apply scrutiny to unsubstantiated mineral-water claims.
Sources · Last reviewed: 2026-04-26
- EU Cosmetic Claims Regulation 655/2013 — common criteria for cosmetic claims
Q. How is DSW typically supplied to cosmetic OEM formulators?
Suppliers typically provide either raw DSW (with mineral content and salinity COA), desalinated DSW, or concentrated mineral solutions ('hardness 1000' style). Each form has different formulation behavior — high-mineral concentrates can interfere with anionic surfactants and gelling polymers.
Sources · Last reviewed: 2026-04-26
- Industry knowledge — Japanese DSW suppliers
Industry-knowledge claim — not yet pinned to a single primary source
Use cases
Face mist / hydration spray
- Positioning
- Mineral hydration / Japanese provenance (Kōchi, Okinawa, Toyama)
- Typical usage level
- Up to 90%+ as primary water phase
- Formulation notes
- Filter for particulates; manage mineral hardness to prevent precipitation with anionics
Sources
- Industry knowledge — Japanese DSW skincare market
Industry-knowledge claim — not yet pinned to a single primary source
Hydrating toner
- Positioning
- Daily mineral-hydration line
- Typical usage level
- 20-90% as water-phase
- Formulation notes
- Pairs with HA, glycerin, panthenol; check polymer compatibility
Sources
- Industry knowledge — Japanese skincare market
Industry-knowledge claim — not yet pinned to a single primary source
Bath salt / bath additive
- Positioning
- Onsen-experience home spa
- Formulation notes
- Concentrated DSW mineral form combined with epsom/sea salt base
Sources
- Industry knowledge — Japanese bath additive market
Industry-knowledge claim — not yet pinned to a single primary source
Hair mist / scalp toner
- Positioning
- Mineral-replenishment scalp wellness
- Typical usage level
- 30-90% water-phase
- Formulation notes
- Light leave-on format; minimal interference with most styling polymers
Sources
- Industry knowledge — scalp-care market
Industry-knowledge claim — not yet pinned to a single primary source
Search the academic literature
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Official regulatory databases
External links to public Japanese / international regulatory authorities. We are not affiliated.
References
- JSCI (Japanese Cosmetic Industry Association) 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.