Importers of HS 8414.90 (of fans (including blowers) and ventilating or recycling hoo) from Japan actually paid 18.86% on the taxed portion of the value in 2026-06 — 17.98% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 4.7%. Over the window the rate on the taxed portion moved 4.7% → 18.86%, with the largest single step +23.8pp in 2025-09. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 4.7% — importers actually paid 18.86%, so the trade-war overlay added 14.2 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8414.90", origin: "Japan") · see it at trimtabist.com/tariffs
HS 8414.90. The schedule base rate is 4.7%; importers from Japan actually paid 18.86% on the dutiable value in 2026-06 — the trade-war overlay added 14.2 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 4.7% (2023-07) → 18.86% (2026-06), largest single step +23.8pp in 2025-09.
Japan's lower duty (17.98% vs 40.76%) lets it price up to 19.3% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Japan actually lands cheaper — $8.85/kg vs $9.63/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 · 5 CBP rulings cite this code · reproduce: tariff_story(hs: "8414.90", origin: "Japan") via /connect. Not customs or legal advice.