Why source from Japan
Sourced from Yoshino (Nara) and Akizuki (Fukuoka) with year-round Japanese supply, consistent quality, and traceability to the prefecture of origin.
Key spec
MOQ from 20–50 kg.
Typical end-product
Premium wagashi and gluten-free desserts — Authentic Japanese gluten-free thickener for kuzu-mochi cubes, warabi-mochi blends, and chilled translucent jellies for café and luxury-retail channels.
At a glance
- Suppliers listed
- 2 suppliers
- Typical MOQ
- 20–50 kg
- Typical lead time
- 8–16 weeks (traditional method is slow)
- Regions of origin
- Yoshino (Nara), Akizuki (Fukuoka), Oita, Mie
- Category
- Food ingredients
- Harvest season
- November – March (root dig)
- Japan regulatory status
- Food Sanitation Act
- Japanese name
- 葛粉
- Romaji
- Kuzu ko
About this ingredient
Kudzu starch is extracted from the thick tuberous root of Pueraria montana. Traditional Japanese production (吉野晒し) involves repeated water-washing of crushed roots over several weeks. Yoshino (Nara) and Akizuki (Fukuoka) are historic production centers; pure Yoshino-kuzu is a premium category with centuries-long continuous production.
Regulatory status
| Japan | Food Sanitation Act |
|---|---|
| EU | Food import rules |
| United States | FDA |
| China | Verify import |
FAQ for OEM buyers
Q. Why are lead times for kuzuko longer than for other starches?
Production is constrained by (1) a winter-only root harvest (November to March, when starch content peaks and the foliage has died back) and (2) the 30- to 90-day cold-water washing cycle of the traditional process. Industry-typical MOQ is 20–50 kg with 8–16 week lead times depending on whether existing stock can be drawn against the current season's production.
Sources · Last reviewed: 2026-04-26
Industry-knowledge claim — not yet pinned to a single primary source
Q. Should I specify '100% hon-kuzu' or accept blended kuzuko?
On the Japanese domestic market a large share of products labelled simply '葛粉' (kuzuko) are actually blends of kudzu starch with sweet potato starch (sometimes only a small fraction is true kudzu). For premium positioning, request '本葛 100%' (100% hon-kuzu) and a starch-composition certificate or a producer attestation. Pricing differs by an order of magnitude, so this is the single most important spec point.
Sources · Last reviewed: 2026-04-26
Q. What COA parameters should I request from a kuzuko supplier?
Ask for: starch purity (typical hon-kuzu >95%), moisture (≤16%), ash, microbiological limits (total plate count, yeast/mold, coliforms, E. coli), heavy metals (Pb, As, Cd), pesticide residues if claiming organic, and a starch-source certificate confirming Pueraria lobata origin (vs. sweet potato or corn). For export, also request allergen-free statement and non-GMO declaration.
Sources · Last reviewed: 2026-04-26
Industry-knowledge claim — not yet pinned to a single primary source
Q. Are there export-control or invasive-species considerations?
Pueraria lobata (kudzu) is classified as an invasive species in the United States, but the regulation applies to live plant material — processed starch is not restricted on those grounds. However, US, EU, and several Asian markets apply standard plant-derived food-import controls; confirm pesticide residue limits on the destination market and ensure the import is correctly declared as 'starch from Pueraria lobata root' rather than 'kudzu plant material'.
Sources · Last reviewed: 2026-04-26
Use cases
Premium wagashi and gluten-free desserts
- Positioning
- Authentic Japanese gluten-free thickener for kuzu-mochi cubes, warabi-mochi blends, and chilled translucent jellies for café and luxury-retail channels.
- Typical usage level
- 8–15% by weight of the liquid base, depending on the desired firmness.
- Formulation notes
- Dissolve in cold water before heating; gels at approximately 70–80 °C. Re-melts on heating, allowing thermo-reversible textures.
Premium ankake and Japanese restaurant sauce thickener
- Positioning
- Substitute for potato or corn starch in restaurant sauces where a glossier, more elastic mouthfeel and cleaner flavor are desired.
- Typical usage level
- 1–3% in finished sauce.
- Formulation notes
- Slurry in cold dashi or water, add late in cooking, simmer briefly to clarify. Sauce remains glossy on chilled storage longer than corn-starch versions.
Sources
Industry-knowledge claim — not yet pinned to a single primary source
Convalescent / wellness 'kuzu-yu' beverages
- Positioning
- Heritage 'warming starch drink' positioned for winter wellness lines, often combined with ginger or umeboshi.
- Formulation notes
- 5–8% kuzuko in hot water with sugar; gives the characteristic translucent, viscous texture.
Sources
Industry-knowledge claim — not yet pinned to a single primary source
Gluten-free baking and binding ingredient
- Positioning
- Specialty gluten-free flour blends for premium bakeries, where kuzu provides binding and a distinctive snap to crackers and biscuits.
- Typical usage level
- 5–20% of the dry-flour blend.
Sources
Industry-knowledge claim — not yet pinned to a single primary source
Japanese suppliers
Inoue Tenkyokudo
井上天極堂
Gose (Yoshino), NaraEst. 1870Yoshino Hon-Kudzu, 10-rinse spring water process
Morino Yoshino
森野吉野葛本舗
Uda (Yoshino), NaraEst. 1570English supportExport experience450-year Yoshino producer; strongest export infrastructure
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Last updated: 2026-04-24