For Producers & Sellers
Bring Japan's
longevity wisdom
to the world.
SHIROKUMA connects Japan's most scientifically validated traditional products — teas, ferments, onsen goods, and more — with a global audience actively seeking evidence-based longevity.
Apply to SellGlobal Reach
Buyers in 40+ countries actively seeking Japan-origin wellness
Scientific Credibility
Our 6-axis certification lends peer-reviewed authority to your brand
Growing Market
$30B+ evidence-based longevity market, Japan critically underrepresented
Seller Support
Export guidance, translation support, and logistics partnerships
What We Accept
Eligible product categories
Tea & Matcha
Shade-grown, ceremonial grade, single-origin Japanese teas
Fermented Foods
Natto, miso, amazake, tsukemono, and other traditionally fermented products
Onsen & Bath
Mineral bath salts, hinoki products, thermal wellness goods
Functional Mushrooms
Reishi, shiitake, maitake — Japanese-grown, extract or whole
Seaweed & Sea Vegetables
Kombu, wakame, nori, hijiki — sustainably harvested
Traditional Condiments
Naturally brewed soy sauce, ponzu, yuzu products, wasabi
Wellness & Lifestyle
Zen-inspired home goods, natural sleep products, movement tools
Experiences & Knowledge
Online courses, farm stays, guided shinrin-yoku experiences
Not sure if your product qualifies? Apply anyway — we review all submissions and provide feedback.
The Process
How certification works
Submit Your Application
Tell us about your product, its origin, production method, and which longevity mechanisms you believe it supports. We review all applications within 14 business days.
6-Axis Scientific Review
Our research team evaluates your product against the SHIROKUMA framework. We look for mechanism plausibility, traditional evidence, and (ideally) peer-reviewed support.
Lab Testing (if required)
Fermented and consumable products may require independent lab verification of active compounds (nattokinase, EGCG, live cultures, etc.). We'll guide you through this process.
Certified Listing
Approved products receive a SHIROKUMA Certification Score (out of 100) across relevant axes, a verified origin story, and access to our international customer base.
Transparent Pricing
Fees & structure
Application review
14-day turnaround
Lab testing (if required)
We coordinate testing; you pay actual cost
Annual listing fee
Per certified product/year
Transaction commission
Lower for PRIME members
B2B certification (PRIME)
In PRIME membership
Apply Now
Start your application
Tell us about your product. We'll respond within 14 business days with evaluation feedback.
All applications reviewed. We respond within 14 business days regardless of outcome.