Shaped over 100,000 years:
the fossil coral of Yonaguni Island.
Yonaguni is the westernmost island of Japan. The fossil coral quarried from its uplifted reef beds holds 74 kinds of natural minerals, with calcium as the main component. ACTIVITY 35 turns that gift into a powder, exactly as nature made it.
calcium as the main component
high-purity fossil coral used
(third-party comparative analysis)
of the powder
About ACTIVITY 35
ACTIVITY 35 is a comprehensive mineral food made by milling fossil coral quarried on Yonaguni Island, Okinawa, using our own activation process. The only ingredient is coral powder — no colourings, no preservatives, 100% natural.
The fossil coral of Yonaguni Island formed roughly 100,000 years ago, making it comparatively young, free from fish bones, sea-urchin spines and shell fragments, and therefore very high in purity. Unfired calcium made from fossil coral is designated as an existing food additive in Japan and has a long history of use.
The powder is close to tasteless and turns water faintly cloudy. Take it with your daily water to top up minerals such as calcium that are easily left short.
More about fossil coralThree reasons people choose ACTIVITY 35
100% fossil coral from Yonaguni Island
Yonaguni is the only source of fossil coral used as food. Unlike coral sand (weathered reef coral) collected from the seabed, ours is quarried from an uplifted deposit on land, so it is far less exposed to marine pollution. A third-party comparative analysis confirmed a fossil coral content of 100%.
74 kinds of natural minerals
Calcium, magnesium, zinc, iron and more — 74 marine minerals including 16 essential minerals, held in the balance nature gave them. Each gram of the powder contains 372 mg of calcium and 6.39 mg of magnesium. Unlike a single-nutrient supplement, this is a complete mineral source blended by nature itself.
Porous structure and our own activation process
The powder keeps the porous structure characteristic of coral. Because our process activates the coral without firing it, the minerals are not altered. Measurements show that on contact with water it generates hydrogen and shifts the water to a weakly alkaline state.
Fossil coral and coral sand are not the same material
Both are "coral-derived", but their origin and formation are completely different.
| Item | Fossil coral from Yonaguni (ours) | Coral sand (weathered reef coral) |
|---|---|---|
| Where it is collected | Quarried on land as food, from an uplifted coral deposit | Collected from the seabed, largely for use as building material |
| Fossil coral content | 100% | 13.7% |
| Foreign material | None | Foraminifera, shell fragments, sea-urchin spines, calcareous algae and more |
| Age | About 100,000 years (young, high purity) | Varies |
* Fossil coral content is based on a third-party comparative analysis (content ratio within a 50 g sample).
Our product
ACTIVITY 35 Set
Activated fossil coral powder "ACTIVITY 35" (45 g, about 45 servings) +
edible citric acid "ACTIVITY 35 PARTNER" (60 g)
¥10,450 (incl. tax)
Taken together with the citric acid, the calcium carbonate dissolves far more readily.
A gift from an ancient sea, in your glass every day.
ACTIVITY 35 is available from our official online shop.
Buy at the official shop