Importers of HS 8458.11 (numerically controlled) from Japan actually paid 9.78% on the taxed portion of the value in 2026-06 — 8.98% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 4.4%. Over the window the rate on the taxed portion moved 4.4% → 9.78%, with the largest single step +4.1pp in 2025-05. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 4.4% — importers actually paid 9.78%, so the trade-war overlay added 5.4 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8458.11", origin: "Japan") · see it at trimtabist.com/tariffs
HS 8458.11. The schedule base rate is 4.4%; importers from Japan actually paid 9.78% on the dutiable value in 2026-06 — the trade-war overlay added 5.4 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 4.4% (2023-07) → 9.78% (2026-06), largest single step +4.1pp in 2025-05.
Japan's lower duty (8.98% vs 39.4%) lets it price up to 27.9% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Japan actually lands cheaper — $24.59/kg vs $71.36/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 · reproduce: tariff_story(hs: "8458.11", origin: "Japan") via /connect. Not customs or legal advice.