Importers of HS 9004.10 (sunglasses) from Japan actually paid 11.24% on the taxed portion of the value in 2026-06 — 11.21% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 2%. Over the window the rate on the taxed portion moved 2% → 11.24%, with the largest single step +6.6pp in 2025-04. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 2% — importers actually paid 11.24%, so the trade-war overlay added 9.2 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "9004.10", origin: "Japan") · see it at trimtabist.com/tariffs
HS 9004.10. The schedule base rate is 2%; importers from Japan actually paid 11.24% on the dutiable value in 2026-06 — the trade-war overlay added 9.2 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 2% (2023-07) → 11.24% (2026-06), largest single step +6.6pp in 2025-04.
Japan's lower duty (11.21% vs 19.47%) lets it price up to 7.4% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $28.28/kg vs $280.99/kg (duty in, freight out).
12 Chapter-99 measures name Japan; scope mapping is partial (several annexes are PDFs) — absence never means exemption. They do not sum, and some are product-specific — the collected rate above is the composed truth.
All goods from Japan · the whole tariff ledger · 3 CBP rulings cite this code · reproduce: tariff_story(hs: "9004.10", origin: "Japan") via /connect. Not customs or legal advice.