
Nutrition Facts
ONSENSUI 99 stands out not just for
its purity and delicious taste,
but also for its ideal pH balance and trace mineral content,
which are believed to promote health benefits.
ONSENSUI99 Nutrition Facts
Nutrition Facts (per 100ml) | |||
---|---|---|---|
Energy | 0kcal | Sodium (salt equivalent | 5.00mg 0.01g) |
Protein | 0g | Calcium | 0.05mg |
Fat | 0g | Magnesium | 0.01mg |
Carbohydrates | 0g | Potassium | 0.08mg |
pH Value 9.5 to 9.9 | Water Hardness 1.7mg/L |
pH and Hardness of ONSENSUI 99
Water Source | Company-owned Wells in Tarumizu City, Kagoshima, Japan |
pH | 9.5 to 9.9 |
Water Hardness* | 1.7 ng/L |
Point 1
Safe for Children
Fluoride Content
The fluoride content in Onsen Water 99 is below 0.8mg/L, making it safe for consumption even for infants under 7 years old.

Regulation | Amount | Indication | Natural Waters |
Japan Water Act | above 0.8 mg/L | the label must include the following statement: “Infants under 7 years old should refrain from consuming this mineral water. (Fluoride concentration: ○ mg/L).” | Including Natural Water |
Codex Standard for Natural Mineral Waters | more than 1 mg/L | the following term shall appear on the label as part of, or in close proximity to, the name of the product or in an otherwise prominent position: “contains fluoride”. | Including Natural Water |
more than 1.5 mg/L | the following sentence should be included on the label: “The product is not suitable for infants and children under the age of seven years” where the product contains more than 1.5 mg/l fluorides. | ||
the U.S. Food and Drug Administration (FDA) | cannot exceed 0.7 mg/L | the allowable level for fluoride in domestically packaged and imported bottled water to which fluoride is added to 0.7 milligrams per liter (mg/L). | Excluding natural waters |
*This maximum level will balance prevention of tooth decay and the risk of fluoride overexposure.
Point 2
Safe for All
Free nitrate nitrogen
ONSENSUI 99 contains 0mg/L nitrate nitrogen.
*Internal Testing

Nitrate nitrogen refers to the nitrogen present in the form of nitrate ions (NO3-) in water or soil. Nitrate nitrogen is an important indicator of water quality and soil fertility. It can come from various sources such as agricultural runoff, wastewater, and natural processes like atmospheric deposition. High levels of nitrate nitrogen in water can pose health risks, particularly to infants, and can also contribute to environmental pollution and eutrophication.


Point 3
100% Natural Alkaline Water
No additional at all
“Natural water” refers to water sourced from specific underground sources, and undergoes no physical or chemical treatment other than settling, filtration, and pasteurization.
Additives | Water Source | Process Treatment | Products | |
Natural Mineral Water (ONSENSUI 99) | No | Specific Underground Water | No | ONSENSUI 99 and other Natural Water |
Mineral Water | Yes | No Specified | Any (physical or chemical) | Mineral Water, Electrolyzed Water, Hydrogen Water and others |