The process begins with soybeans sourced from small farms and local agricultural collectives in Ibaraki Prefecture, Japan. The sourcing is built around the season: selecting soybeans when they are ready, working with local growers, and keeping the ingredient connected to the region where traditional natto production has deep roots. A closer relationship with the farms, more attention to the ingredient, and a sourcing process built around quality and connection.
The soybeans are prepared using the ancient Japanese natto tradition. They are wrapped in rice straw and left to ferment for several days, allowing the natural fermentation process to create the nattokinase enzyme that gives natto its name. This is the traditional foundation we preserve at the expense of profit. The technology comes later, to preserve consistency and potency without losing the Japanese origin story that makes our nattokinase authentic.
Once fermentation is complete, the nattokinase enzyme is carefully extracted in a controlled laboratory environment. The extracted enzyme is then filtered and refined for potency before being converted into a consistent powder form. This powder becomes the active ingredient used in the finished capsules. Traditional fermentation creates the enzyme. Modern laboratory processing helps turn it into a measured, repeatable formula at the same effectiveness in studies.
The finished powder is placed into plant-based delayed-release capsules designed for maximum absorption when taken on an empty stomach. The delayed-release format helps the active enzyme move through the digestive system before releasing it in the intended absorption area, with its benefits spread throughout the day. Every serving delivers guaranteed, clinical-grade 10,800 FU nattokinase, over four times the standard dose, the exact amount in clinical trials.
Every batch is independently tested for identity, potency, and purity.
We publish results so you can verify exactly what’s in your bottle.
Japanatto Nattokinase works gradually — dissolving fibrin buildup takes time, not days.
Give your arteries 60 days to respond. If you don't feel a difference, contact us for a full, hassle-free refund.
We don’t believe in forcing belief.
If Japanatto Nattokinase doesn’t meet your expectations, our support team will process your refund quickly.
From operators to local advisors, your heart health is in good hands.
CEO & Founder
Charles left the US to Japan for several years and became fascinated by the country’s aging population and its approach to heart health longevity. He decided to put resources behind local talent and build Japanatto focused entirely on helping western clients protect their cardiovascular health with natto-based solutions.
Chief Scientist
Hitoshi believes the best formulas respect where an ingredient comes from while proving how it works. His education in history and biology, combined with his first lesson on Miyamoto Musashi, shaped Japanatto’s tradition-meets-science approach to high-potency nattokinase.
Head of Research
Yuri spent years comparing more than 200 studies before settling on the research direction behind Japanatto Nattokinase. She paid particular attention to arterial inflammation, blood viscosity, blood pressure, plaque, and clotting because better cardiovascular support starts with circulation.
Client Support
Raised in the US and the UK by Japanese parents, Kim brings both cultural understanding and fluent Japanese and English communication to every customer conversation. Kim helps with product questions, medication and allergy concerns to help hit your heart health goals with the proper usage of nattokinase.
Celebrating Their Newfound Japanese Heart Health
