Classification
Product TypeRaw Material
Product FormFresh
Industry PositionPrimary Agricultural Product
Raw Material
Commodity GroupRoot vegetable (Brassicaceae)
Scientific NameRaphanus sativus
PerishabilityModerate (cold-chain dependent); long storage life is possible under near-0°C conditions but quality declines rapidly with temperature abuse
Growing Conditions- Commercial supply is supported by cultivation improvements that enable year-round availability in some markets, though peak seasonality in Japan is primarily autumn through winter
- Daikon production sites highlighted in Japan GI documentation emphasize good water supply with well-drained soils and avoidance of overly wet conditions
Main VarietiesDaikon (Japanese white radish), Aokubi daikon (dominant Japan retail type), Shape-based market types (cylindrical, oblong, spherical)
Consumption Forms- Fresh (raw, grated, salads; and cooked preparations)
- Pickled products and preserved formats (varies by cuisine and market)
- Dried shredded daikon products (e.g., kiriboshi/sengiri-style preparations)
Grading Factors- Firmness and smooth, well-formed roots; free of decay and pest damage
- Absence of pithy/spongy texture (age/over-maturity indicator)
- Clean appearance and freedom from harvest wounds that can become decay entry points
Market
Fresh daikon (Japanese white radish) is a globally available specialty root vegetable whose international trade is typically captured within broader “radishes and similar edible roots” customs groupings rather than a single daikon-only line. Production and primary consumption are concentrated in East Asia, with China representing a very large share of global radish output in the published agronomic literature, and Japan maintaining widespread domestic production with pronounced autumn–winter seasonality but year-round availability. In 2023 UN Comtrade-based data for HS 070690 (a category that includes radishes alongside other similar roots) shows major export supply from the Netherlands, China, Italy, and Mexico, with major import demand in Germany, the United States, and South Korea. Market performance is heavily shaped by cold-chain discipline because temperature abuse accelerates soft-rot and quality loss, while residue and phytosanitary compliance influences border acceptance.
Major Producing Countries- 중국Peer-reviewed agronomic literature reports China’s radish production at 44.6 million tons in 2016, representing 47% of worldwide radish yield (crop category includes daikon-type radishes).
- 일본Daikon is widely produced across Japan and is available year-round in commerce; peak season is primarily autumn through winter (major production areas span from northern to southern prefectures).
Major Exporting Countries- 네덜란드Top exporter in 2023 for HS 070690 (category includes radishes and similar edible roots; not daikon-only).
- 중국Top exporter in 2023 for HS 070690 (category includes radishes and similar edible roots; not daikon-only).
- 이탈리아Top exporter in 2023 for HS 070690 (category includes radishes and similar edible roots; not daikon-only).
- 멕시코Top exporter in 2023 for HS 070690 (category includes radishes and similar edible roots; not daikon-only).
Major Importing Countries- 독일Top importer in 2023 for HS 070690 (category includes radishes and similar edible roots; not daikon-only).
- 미국Top importer in 2023 for HS 070690 (category includes radishes and similar edible roots; not daikon-only).
- 대한민국Top importer in 2023 for HS 070690 (category includes radishes and similar edible roots; not daikon-only).
- 프랑스Top importer in 2023 for HS 070690 (category includes radishes and similar edible roots; not daikon-only).
- 폴란드Top importer in 2023 for HS 070690 (category includes radishes and similar edible roots; not daikon-only).
Supply Calendar- Japan:Sep, Oct, Nov, Dec, Jan, FebPeak season is primarily autumn through winter, though improved varieties and cultivation practices support year-round availability.
- Global (multi-origin trade availability):Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, DecCommercial availability can be year-round due to staggered plantings and multi-origin sourcing; USDA inspection guidance describes daikon as in season throughout the year.
Specification
Major VarietiesAokubi daikon (green-necked; dominant in Japan retail), Cylindrical daikon types, Oblong daikon types, Spherical daikon types
Physical Attributes- Large white root marketed as daikon (also called Chinese turnip, Japanese radish, mullang in USDA inspection guidance)
- Firm, smooth roots preferred; pithiness/sponginess is a key quality defect (age/over-maturity indicator)
Grades- United States: no U.S. grade standards for daikon; USDA Specialty Crops Inspection Division uses commodity-specific inspection instructions
- International trade: UNECE Standard FFV-43 for radishes specifies minimum requirements and two quality classes (Class I and Class II) for radishes moving in international trade (industrial processing excluded)
Packaging- Bunched presentations are common: small daikon marketed in bunches of 4–6 roots; larger daikon in bunches of 1–4 roots (USDA inspection guidance)
- Export/wholesale commonly uses carton or bulk pack formats sized for cold-chain handling (format varies by market and buyer specification)
Supply Chain
Value Chain- Harvest (bunched or topped) -> field heat removal/rapid cooling -> washing/cleaning -> sorting and packing -> refrigerated transport -> wholesale/retail distribution
Demand Drivers- Core demand anchored in East Asian cuisines (raw, simmered dishes, and pickled uses), supporting consistent retail and foodservice pull in major consumption markets
- Processing demand for preservation formats such as dried shredded daikon (kiriboshi/sengiri daikon) and pickled products supports seasonal surplus utilization
Temperature- Optimum storage temperature for radish is 32°F (0°C); rapid cooling is essential to achieve storage potential
- Daikon-type radish may last 3–4 months under optimum temperature and high relative humidity conditions
Atmosphere Control- Controlled atmospheres around 1–2% O2 and 2–3% CO2 are reported as slightly beneficial for topped radish at 5–7°C; temperatures above 7°C can lead to off-flavors, browning, and soft-rot
Shelf Life- Under optimum conditions (0°C and very high relative humidity), daikon-type radish storage life can extend to 3–4 months; temperature abuse shortens commercial life via decay and textural defects
Risks
Cold Chain And Quality Loss HighFresh daikon trade performance is highly sensitive to temperature management: radish requires rapid cooling and near-0°C storage for best quality, and exposure to warmer conditions increases off-flavors, browning, and soft-rot, raising rejection and shrink risk in long-distance distribution.Use rapid postharvest cooling, maintain 0°C-class refrigeration with high humidity, minimize transit delays, and apply destination QC checks for firmness, pithiness, and decay.
Regulatory Compliance MediumPesticide-residue compliance is a recurrent cross-border risk for fresh vegetables; differing national maximum residue limits can create trade frictions and shipment detentions when residues exceed the destination’s legal limits (Codex MRLs are a common international reference but do not replace national rules).Align spray programs and pre-harvest intervals to destination-market residue requirements, validate via residue testing, and reference Codex MRLs where relevant in buyer specifications.
Postharvest Disease MediumRadish is susceptible to bacterial and fungal decay development during storage and distribution, particularly when roots are wounded and storage temperatures drift above optimum, leading to rapid quality degradation and lot-level claims.Reduce harvest wounds, apply hygienic washing where used, keep storage at optimum temperature, and avoid moisture condensation that accelerates decay.
Quality Standards Alignment LowDaikon lacks a dedicated U.S. grade standard, and trade may rely on buyer specifications or general radish standards; inconsistent defect tolerances and sizing expectations can increase dispute risk across heterogeneous supply chains.Contract on explicit size/shape/defect tolerances and sampling plans, and reference recognized inspection/marketing standards (e.g., USDA inspection guidance; UNECE radish standard) where appropriate.
Sustainability- Food loss and waste risk from spoilage when cold-chain conditions are not maintained (quality and decay losses translate directly into shrink)
- Cold-chain energy use and emissions sensitivity for long-distance shipments requiring near-freezing temperature management
FAQ
Are there U.S. grade standards for daikon radish?No. USDA AMS states there are no U.S. grade standards for daikon, and it provides inspection instructions to support official inspections and proper identification.
How long can fresh daikon radish be stored under optimal conditions?UC Davis postharvest guidance indicates daikon-type radish may last about 3 to 4 months when stored at 0°C (32°F) with very high relative humidity (about 95–100%).
Which countries are major exporters and importers in UN Comtrade data for the broader HS 070690 category that includes radishes?In 2023 UN Comtrade-based WITS data for HS 070690, top exporters included the Netherlands, China, Italy, and Mexico, while top importers included Germany, the United States, South Korea, France, and Poland (noting this HS category includes radishes along with other similar edible roots).