Classification
Product TypeIngredient
Product FormDry Granulated Flour
Industry PositionFood Ingredient (Glutinous Rice Flour for Confectionery)
Market
Shiratamako is a Japanese-style glutinous rice flour made by wet-milling soaked glutinous rice, then dewatering and drying into characteristic granules used mainly for wagashi and dumplings. Global trade is niche and is typically bundled within broader rice flour customs categories rather than tracked as a distinct product line. Production know-how and branding are strongly associated with Japan, while raw glutinous rice inputs can include imported origins depending on manufacturer sourcing. Market dynamics are shaped by specialty Japanese food demand, gluten-free formulation interest, and tight compliance expectations for contaminants in rice-based ingredients in major import jurisdictions.
Market GrowthMixed (medium-term outlook)Specialty-demand growth alongside broader rice-flour adoption, with limited transparency for product-specific trade volumes
Major Producing Countries- 일본Traditional processing method and product identity are strongly associated with Japanese confectionery ingredient supply chains.
Supply Calendar- Japan:Aug, Sep, Oct, NovRice harvest timing varies by region; shiratamako production can operate year-round using stored rice.
Specification
Major VarietiesMochigome (Japanese glutinous short-grain rice; waxy rice types of Oryza sativa L.)
Physical Attributes- Granular or lumpy appearance (粒状) despite fine underlying particle size; rehydrates to a smooth dough texture
- Designed for a smooth, elastic mouthfeel in shiratama dango and related wagashi applications
Compositional Metrics- Glutinous (waxy) rice starch is predominantly amylopectin, supporting sticky/elastic gel formation when cooked
- Product quality is influenced by the polishing degree and quality of the glutinous rice input and by the wet-milling/dewatering process control
Packaging- Common retail-to-foodservice packs include small bags and 1 kg formats; moisture-barrier packaging is important to maintain flowability
ProcessingWet-milled processing (water grinding) after soaking, followed by dewatering and drying, differentiates shiratamako from dry-milled glutinous rice flours (e.g., mochiko)Formulated to produce a smooth texture and to resist rapid hardening after cooling in typical wagashi applications
Supply Chain
Value Chain- Glutinous rice procurement -> polishing -> washing/soaking -> wet milling (water grinding) -> stirring/settling and dewatering -> granulation/cutting -> warm-air drying -> packaging -> specialty distribution (retail/foodservice) -> export via Japanese/Asian ingredient channels
Demand Drivers- Traditional Japanese confectionery applications (e.g., shiratama dango, daifuku, sakuramochi) needing smooth, elastic texture
- Gluten-free formulation demand for rice-based flours where verified low-gluten handling and labeling systems exist
Temperature- Shelf-stable dry ingredient: store cool and dry; prevent moisture uptake (caking/mold risk) and insect infestation during storage and shipping
Risks
Regulatory Compliance HighRice flour is subject to contaminant controls (notably inorganic arsenic limits in some major markets). Lots that exceed jurisdictional maximum levels can be refused entry or trigger recalls, creating acute trade disruption risk for shiratamako shipments marketed as rice flour/glutinous rice flour.Implement supplier qualification and lot-based testing/COAs for inorganic arsenic aligned to target-market limits; maintain traceability and segregate lots intended for stricter end uses (e.g., infant/young child foods where applicable).
Climate MediumGlutinous rice availability and quality are exposed to weather variability (heat stress, typhoons, flooding) in key production areas; localized shocks can tighten specialty-grade input supply and raise prices for wet-milled confectionery flours.Qualify multiple glutinous rice input origins and millers; use forward purchasing and buffer stock strategies for peak seasonal procurement windows.
Quality and Shelf Stability MediumAs a moisture-sensitive dry ingredient, shiratamako can lose usability through caking, off-odors, pest infestation, or microbial issues if packaged or stored poorly, undermining performance in premium confectionery applications.Use moisture-barrier packaging, controlled warehouse humidity, and robust pest management; define buyer specs around appearance, odor, and hydration/cooking performance.
Sustainability- Rice cultivation methane emissions: flooded rice systems are a recognized methane source and can drive supply-chain climate-accounting scrutiny
- Water management and climate resilience in rice-growing regions (heat stress, flooding, drought) affecting yield and quality stability for glutinous rice inputs
FAQ
How is shiratamako different from mochiko (both glutinous rice flours)?Both are made from glutinous rice, but shiratamako is made by soaking the rice and wet-milling it with water, then dewatering and drying, which produces the characteristic granules and a smooth texture in cooked doughs. Mochiko is typically made by dry-milling rice that has been washed and dried without the same wet-milling slurry and dewatering steps, so the handling and final texture can differ.
Is shiratamako gluten-free?Rice does not contain gluten, so shiratamako made solely from rice is inherently non-gluten as an ingredient. However, gluten-free labeling depends on verified low-gluten handling and testing (to address cross-contact), and Japan has established a self-regulatory non-gluten rice flour labeling approach with a defined gluten threshold.
Why is inorganic arsenic a key trade/compliance risk for rice flour ingredients?Some jurisdictions set maximum levels for inorganic arsenic in rice and rice-based products, including rice flour. If a shipment fails those limits, it can be rejected at the border or recalled, so exporters and importers commonly manage this risk through supplier controls, testing, and lot traceability.