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About

The person you'll work with.

iiims is deliberately small. Every engagement is led by its founder, Yusuke Fujii, with specialists in regulatory, manufacturing and design brought in as each project needs them.

Yusuke Fujii in Tokyo

I grew up in New Jersey and think in English and Japanese interchangeably. For an overseas brand in Japan, that matters more than it sounds: most failed entries aren't regulatory failures — they're translation failures, of intent and expectations.

After Keio University and JTB, where I ran hospitality operations for Formula 1 teams, the Toyota Cup and the 2002 FIFA World Cup, I studied clinical nutrition at the Institute for Optimum Nutrition and human nutrition at the University of Westminster in the UK.

Back in Japan, I negotiated the exclusive contract that brought Metagenics to Japan in 2009, then managed its products here — formulation changes, every import procedure, the supply chain, and a medical channel built from nothing. I did the same for Oragenics' patented oral probiotics, and signed exclusive agreements with more than ten raw-ingredient suppliers.

As Chief Product Officer at MSS, I led a range used by more than 7,000 Japanese medical institutions. I advised Metagenics Inc. on the joint venture that became Metagenics Japan, and served as its Board Director and CTO until 2024.

I completed a Ph.D. in Microbiology and Immunology at Mahidol University in 2023, and I'm a Visiting Researcher at the University of Tokyo Graduate School of Medicine. Today I advise a Japanese GMP OEM manufacturer and develop products with Japanese D2C brands — the same work I now offer founders coming from abroad.

Track record

What's relevant to your brand

YearsRoleWhy it matters to you
2019–2024Board Director & CTOMetagenics JapanRan formulation, quality, regulatory, training and operations for a US brand's Japanese company.
2018–2019AdvisorMetagenics Inc. (USA)Structured the Japanese joint venture from the US side.
2016–2023Chief Scientific Officer & Chief Product OfficerMSS Co., Ltd.Product development for Japan's largest practitioner-only supplement company.
2016–President & CEOiiims Co., Ltd.Product development, market entry and JV consulting for overseas companies.
2011–2016General Manager, New BusinessKYB Medical ServiceMetagenics and Oragenics product management in Japan: import procedures, supply chain, marketing, medical channel.
2009–2011Director, International BusinessOrthomolecular Nutrition LaboratoryExclusive contracts with Metagenics, Oragenics and 10+ ingredient suppliers.
2025–AdvisorHakuho Chemical Co., Ltd.Design, development and quality advisory to a Japanese GMP supplement OEM.
2026–Product development consultantKINSNew products for a leading Japanese microbiome-care D2C brand.
2019–2022Director & CMOPAC-AID Beverages Inc. (Philippines)Concept, formulation and prototyping of a sports beverage for an international launch.
Education

Training

YearQualificationInstitution
2023Ph.D., Microbiology & ImmunologyMahidol University, Thailand
2025–Visiting ResearcherUniversity of Tokyo Graduate School of Medicine
2019–2020Research Fellow, Public HealthOsaka University Graduate School of Medicine
2005–2008Human NutritionUniversity of Westminster, UK
2004–2005Clinical Nutrition (Honours)Institute for Optimum Nutrition, UK
2000LL.B., Political ScienceKeio University

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