Importers of HS 8471.50 (processing units other than those of subheading 8471.41 or 8) from Japan actually paid 22.39% on the taxed portion of the value in 2026-06 — 0.34% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is Free. Over the window the rate on the taxed portion moved null% → 22.39%, with the largest single step +10.4pp in 2025-05. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is Free — importers actually paid 22.39%, so the trade-war overlay added 22.4 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8471.50", origin: "Japan") · see it at trimtabist.com/tariffs
HS 8471.50. The schedule base rate is Free; importers from Japan actually paid 22.39% on the dutiable value in 2026-06 — the trade-war overlay added 22.4 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved % (2023-07) → 22.39% (2026-06), largest single step +10.4pp in 2025-05.
Japan's lower duty (0.34% vs 24.64%) lets it price up to 24.2% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Japan actually lands cheaper — $31.4/kg vs $121.52/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 · 6 CBP rulings cite this code · reproduce: tariff_story(hs: "8471.50", origin: "Japan") via /connect. Not customs or legal advice.