Certified Marketplace
Products scored
by the 6 axes
Every product is evaluated against SHIROKUMA's 6-axis framework. Only those with demonstrated mechanisms on at least one longevity axis are listed.
9 products found
Premium Natto Starter Culture
Mito, Ibaraki
Bacillus subtilis natto culture for home fermentation. Contains nattokinase (cardiovascular), vitamin K2 (bone/arterial), and seeded Bifidobacterium. One of Japan's most studied longevity foods.
Ceremonial Grade Matcha
Uji, Kyoto
First-harvest shade-grown tencha, stone-ground to preserve EGCG polyphenol concentration. L-theanine promotes alpha-wave states, EGCG activates AMPK and supports mitochondrial function.
Hinoki Bath Salt Blend
Kiso Valley, Nagano
Onsen-inspired thermal bath experience using Japanese cypress (hinoki) essential oil. Heat stress activates HSP70 and promotes mitochondrial biogenesis — the mechanism behind onsen longevity.
Aged Miso (3-Year Hatcho)
Okazaki, Aichi
Traditionally brewed 3-year aged miso from Okazaki. Unpasteurized to preserve live lactobacillus. High in isoflavones with demonstrated effects on menopausal hormone levels and gut diversity.
Wakame & Kombu Seaweed Set
Naruto, Tokushima
Sustainably harvested Naruto wakame and Rishiri kombu. Fucoidan from brown seaweed shows anti-inflammatory and anti-angiogenic properties. Natural iodine supports thyroid and metabolic function.
Reishi Mushroom Extract
Niigata Prefecture
Dual-extracted (water + alcohol) reishi (Ganoderma lucidum) from log-grown cultivation. Triterpenes modulate cortisol response; beta-glucans support NK cell activity and immune regulation.
Black Sesame & Walnut Paste
Kyoto Blend
Traditional Japanese goma paste blended with walnut. Sesame lignans support estrogen metabolism and antioxidant activity. Walnut omega-3 and tryptophan provide melatonin pathway support.
Ginger & Yuzu Fermented Tonic
Kochi Prefecture
Lacto-fermented ginger with yuzu citrus. Gingerols inhibit COX-2 (same pathway as ibuprofen, naturally). Yuzu limonene elevates adiponectin. Fermented base delivers live cultures.
Silk Protein Sleep Mask
Kyoto Nishijin
Woven from Kyoto Nishijin silk with 100% blackout capacity. Silk sericin has been shown in studies to enhance slow-wave sleep. Designed for circadian light management and melatonin preservation.
For Producers
List your product
on SHIROKUMA Marketplace
Japanese tea farmers, fermentation artisans, onsen resorts, and wellness brands — get your products evaluated and certified against our 6-axis framework.
Apply as a Seller →