About Us

Gently Supporting Your Fertility Journey

Ninkatsu Style is a brand born to support all couples who wish to have children, gently accompanying them on their fertility journey.

In today's world of dual-income families, delayed marriage and childbearing, high-stress society, and diverse family values and lifestyles, it is challenging to solve fertility challenges through effort alone.

"We can't seem to get the timing right for natural conception..."
"Physical reasons make intercourse difficult..."
"We want to try fertility methods at home before visiting a clinic..."
"We want children, but we're experiencing sexual dysfunction..."

In response to these concerns, we developed the "Prement Syringe," which allows couples to try the syringe method at home. We were the first in Japan to commercialize and sell this product. We remain committed to supporting every couple's fertility journey with compassion, helping them achieve their dream of parenthood.

Pioneer of Syringe Method Kits
Industry-Leading Fertility Support

"Prement Syringe" is the syringe method kit we developed and were the first to commercialize and sell in Japan. Since its launch in 2016, we have sold a cumulative 2.5 million units and received over 1,000 pregnancy success reports from our customers.

Our products are now used not only by couples seeking to conceive, but also by fertility specialist clinics, wellness centers, acupuncture clinics, herbal medicine pharmacies, and hospitals in Hong Kong and beyond.

• Since 2016, Launch

  Total Reviews 3,025 Reviews

• Pregnancy Success Reports

  1,000+Achieved

User-Centered Product Development
Addressing Physical and Emotional Needs

Every couple deserves the opportunity to have children, and we are committed to supporting both their physical and emotional well-being.

To achieve this, our product development at Ninkatsu Style focuses on creating designs that are comfortable to use and minimize user burden.

We establish strict quality control standards for all our products to ensure customers receive safe, reliable products they can trust.

Market Leadership
90% Production Share, 92% Shipping Share
45 Consecutive Weeks as #1 on Rakuten Rankings Since 2016 Launch (Data Period: December 4, 2017 - October 28, 2018)

Prement Syringe (catheter) has achieved outstanding market performance in the Ministry of Health, Labour and Welfare's Pharmaceutical Industry Production Dynamics Survey (February 2019 - April 2022) for semen injection uterine catheters, with an average production share of 90% and an average shipping share of 92%.