Importers of HS 8483.50 (other) from Japan actually paid 8.46% on the taxed portion of the value in 2026-06 — 8.45% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 2.8%. Over the window the rate on the taxed portion moved 2.8% → 8.46%, with the largest single step +18.3pp in 2025-09. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 2.8% — importers actually paid 8.46%, so the trade-war overlay added 5.7 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8483.50", origin: "Japan") · see it at trimtabist.com/tariffs
HS 8483.50. The schedule base rate is 2.8%; importers from Japan actually paid 8.46% on the dutiable value in 2026-06 — the trade-war overlay added 5.7 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 2.8% (2023-07) → 8.46% (2026-06), largest single step +18.3pp in 2025-09.
Japan's lower duty (8.45% vs 33.05%) lets it price up to 22.7% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $7.04/kg vs $10.11/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 · 25 CBP rulings cite this code · reproduce: tariff_story(hs: "8483.50", origin: "Japan") via /connect. Not customs or legal advice.