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Silkworm cocoons suitable for reeling represent the earliest stage of the raw silk supply chain, harvested before the chrysalis is killed and the continuous filament is unwound. Japan leads US imports under this heading, a reflection of Japan's long-standing sericulture tradition and the premium placed on Japanese cocoon quality in specialty textile markets. Because these are agricultural products of animal origin, importers must be aware of USDA APHIS quarantine requirements governing the entry of animal-derived materials that could harbor pests or pathogens. The single US tariff line (5001000000) covers all reelable cocoons regardless of variety or origin.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Yes. As an animal-derived agricultural product, silkworm cocoons are subject to USDA APHIS review at the port of entry. Importers should verify current APHIS admissibility requirements and may need to provide phytosanitary or health certificates from the country of origin. Consulting a licensed customs broker familiar with APHIS entry procedures is advisable before shipment.
Cocoons suitable for reeling (HTS 500100) are intact, undamaged cocoons from which a continuous silk filament can be unwound. Cocoons that are pierced, double, or otherwise unsuitable for reeling are classified as silk waste under HTS 500300. The physical condition and commercial usability of the cocoon at the time of importation determine the correct heading.
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Subheading 1 of 1 in heading 5001
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share |
|---|---|---|---|---|
| 5001000000 | Silkworm Cocoons Suitable for Reeling | $0 | -- | -- |
ImportsExports
Imports
$0YoY · Pro
Exports
$0YoY · Pro
12-mo low · imports
YoY · ProFewer than 6 of the last 12 months reported trade above $500K; the trend chart is not shown for thin series.
Through July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
customs district
destination
entry
rate provision · imports
None recorded for this period.