API Co., Ltd. is a Japan-based dietary supplement OEM/ODM manufacturer with over 115 years of experience in health-related industry.

We help brands unlock their supplement potential through  science-driven formulation, reliable manufacturing, and Japanese quality.

From concept development to production, quality control, and regulatory support. API provides end-to-end solutions designed to support long-term brand success.

With our independent in-house R&D Center, we transform product ideas into clinically supported formulas that are practical, scalable, and trusted in real markets.

・Our mission is to create trusted wellness solutions through science and quality.

・We are committed to developing supplements based on clinically supported concepts,

    carefully designed formulations, and consistent manufacturing standards.
    By combining nutritional science with disciplined Japanese craftsmanship, we help our partners

    deliver products that consumers  can rely on every day.

Research-Driven Innovation

With our in-house R&D Center in Japan,
we develop products that combine Japanese research

expertise with market-oriented formulation design.

Unlock Your Supplement Potential

We support your product journey end-to-end, from concept

and formulation to production, supporting market launch.

Made in Japan Quality

All products are developed and manufactured in Japan,
ensuring high safety, reliability, and premium brand value.

Long-Term Partnership Mindset

 We work as a trusted development partner,
supporting your long-term success in global markets.

Our operations are guided by our Environmental Declaration and Environmental Policy, which form the foundation of our environmental management framework.

We focus on the following three key priorities:

Furthermore, our NS/Ibigawa Plant has undergone

verification and evaluation through a SMETA (Sedex

Members Ethical Trade Audit) conducted by Sedex,

assessing our efforts toward responsible and sustainable operations.