Founder’s note

Hello everyone,

My name is WEIFAN CHIA, the Managing Partner of IPPONGI LLC Japan and Special Assistant to PROSUNFUN Biotech R&D Co., Ltd. in Taiwan.

I would like to share a little about the vision behind our brand, PROTAI, and the belief that drives us — to bring the ultimate wellness to life itself.

In one simple phrase, PROTAI is the peptide of happiness.

Allow me to tell you why this mission is so deeply personal to me, and how it all began.

I founded the PROTAI Beauty & Wellness brand here in Japan, but its origin lies in PROSUNFUN Biotech in Taiwan — a company that has spent more than a decade researching thousands of peptide sequences. Learning about that work made me want to bring its story to Japan.

In 2022, when my father fell ill, I returned to Taiwan after many years. Until then, I hadn’t fully understood the kind of research his company was pursuing. As I read through the PROTAI research data for the first time, I immediately felt — this is something truly special for the world.

From that moment, I started from zero in Taiwan — searching for distribution channels and partners who shared the same passion. With tremendous support, we achieved a total of 80,000 bottles sold by September 2025. I remain grateful to the people who joined us along the way.

Through these experiences, I came to realize something profound: It is not only the peptide itself that matters, but also the heart of the people who wish to use it meaningfully.

Rather than presenting PROTAI as just another biotechnology product, I see it as a gentle expression of care — a way to make a little room for an everyday skin-care ritual amid fatigue and busy schedules.

We often say, “The eyes are the windows to the soul.” And when those windows are tired, many people have told us,

“PROTAI has truly comforted me.”

These voices come not only from older people, but also from students preparing for exams, professionals working long hours in front of screens, and many others in our digital world. To all of them, we hope to offer a thoughtful moment of eye-area skin care.

That is why I call PROTAI — the peptide of happiness. Its mission is simple yet powerful: to make our world, and our everyday lives, a little brighter and more fulfilled. That, to me, is the true value of PROTAI.

By combining the advanced biotechnology of our Taiwanese parent company with the precision and craftsmanship of Japan, my goal is to deliver this gift to those who need it most — in the most authentic and human way possible. This has become not only my dream, but my life’s purpose.

Since encountering PROTAI, this work has given me a personal sense of purpose. Each time someone understands why it matters to me, I feel a deep sense of joy and meaning.

Throughout 2025, I have devoted all my time and heart to shaping PROTAI here in Japan. More than any result, I believe what truly matters is that our work continues to bring happiness to others.

In Taiwan, I’ve met many people who shared their own stories and made this journey meaningful to me. Each encounter has stayed with me.

Now, I would like to invite you into that story — through IPPONGI, a wellness brand born in Kyoto, Japan — and to dream together with us.

Thank you sincerely for taking the time to read this message. From the bottom of my heart, I offer you my deepest gratitude.