Japan, Taiwan, and South Korea Tariffs for US Shippers

The US-Japan framework agreement capped Japan tariffs at 15% effective August 7, 2025, but Section 232 duties on Japanese steel and aluminum stay at 50%. Copper carries the same rate. Taiwan reached 15% in January 2026 after months stuck at 20%. South Korea hit 15% in November 2025 before getting bumped back to 25% in January 2026 over a legislative ratification dispute. Three countries, three different timelines, three different sectoral carve-outs. Any US importer treating these rates as interchangeable is going to misprice their landed costs on the first shipment.

Current japan tariffs structure under the 2025 framework agreement

Here is how the US-Japan deal works. If a Japanese product MFN (Most Favored Nation) rate sits below 15%, the reciprocal tariff fills the gap to bring the total to 15%. MFN rate at or above 15%? No additional tariff. No stacking.

This was not the case at launch. Between August 7 and September 4, 2025, import duties from Japan to USA were being stacked on existing MFN rates. The executive order language copied the EU template but missed the no-stacking provision for Japan. Importers who paid stacked rates during that window can file Post Summary Corrections for unliquidated entries or formal protests under 19 USC §1514 for liquidated ones.

Carve-outs matter more than the headline rate. Civil aircraft and parts under the WTO Agreement on Trade in Civil Aircraft get zero tariffs. Generic pharmaceuticals and certain natural resources can qualify for 0% at the Commerce Secretary discretion. Japanese autos dropped from 27.5% to 15% as of September 16, 2025. Steel, aluminum, and copper? Still 50% under Section 232. No framework agreement touches those.

We talk to import managers who assumed the 15% rate covered everything from Japan. It does not. The Japan-to-US import tax on a steel shipment is still 50%. The Section 232 investigation into semiconductors could stack another layer on top of what is already there. If your broker is still using pre-September HTSUS codes, you are either overpaying or underpaying. Both land you in trouble.

Taiwan tariffs settled at 15% after a volatile 2025

Taiwan's path to 15% was anything but smooth. April 2025 brought a threatened 32% reciprocal rate. The actual implementation landed at 20% in August. It took until February 12, 2026, for the Agreement on Reciprocal Trade to close the gap down to 15%, matching Japan and the EU.

Taiwan secured exemptions from reciprocal tariffs for 1,811 industrial products. Average effective rate on those qualifying goods: 12.32% per Taiwan Cabinet. Generic pharmaceuticals, aircraft components, and unavailable natural resources qualify for 0%. Auto parts dropped from 25% to 15%, with timber and lumber following the same cut under Section 232.

The semiconductor angle is where it gets complicated. Taiwan committed $250 billion in direct investment to build fabs in the US, plus $250 billion in credit guarantees. Future semiconductor tariffs will run under a quota system tied to how much capacity TSMC and others actually bring online. For US importers, that means Taiwan tariffs on chip-related goods are still a moving target. The Section 232 investigation into semiconductors has not closed.

We hear this from companies importing Taiwanese components constantly: the US trade deficit with Taiwan reached $126.9 billion in the first 11 months of 2025. Nearly double the $73.7 billion for the prior full year. AI chip imports are driving that number up. As long as the deficit keeps ballooning, political pressure to raise tariffs again will not ease up, no matter what the agreement says.

Exporting to South Korea means tracking a rate that will not stay put

South Korea is the most unstable of the three. The KORUS Free Trade Agreement had eliminated virtually all bilateral tariffs. For over a decade, US exporters had preferential access to a $200 billion bilateral trade corridor. That is gone.

The timeline: April 2025, 10% baseline plus 25% country-specific rate. July 31, framework deal announced — rate dropped to 15%. November 1, auto tariffs implemented at 15% retroactively. December 4, USTR published the Federal Register notice. Then January 26, 2026, Trump raised it all back to 25% because the Korean legislature had not ratified the deal. We watched a machinery exporter spend four months repricing their Korea contracts to reflect the 15% rate, only to redo the entire exercise when it snapped back to 25%. $180,000 in margin erosion before they could adjust purchase orders.

Retaliatory dynamics cut both directions. Seoul committed to $350 billion in US investment and $100 billion in energy purchases, but disputes over the won exchange rate and the investment timeline have stalled implementation. One approach that does not work: pricing your Korea-bound shipments assuming the 15% rate will hold. We watched companies do exactly that in Q4 2025, only to eat the 10-point increase when January 2026 hit. Record Korean exports of $709.4 billion in 2025 masked a 3.8% decline in US-bound shipments. Auto exports to the US dropped over 13% to $30.2 billion.

Exporting to South Korea in controlled technology categories means complying with both US export controls (EAR/ECCN) and Korea Strategic Technology Protection Act. Any company looking to export to South Korea in semiconductor or quantum tech needs to check both jurisdictions. South Korea tightened its dual-use controls in 2025 to match Wassenaar Arrangement updates on semiconductor manufacturing equipment and quantum technologies. Dual jurisdiction. Double the paperwork.

Import fees from japan to US go well beyond the tariff

Most importers fixate on the tariff percentage and miss the rest. Total landed cost on import fees from Japan to US includes the 15% reciprocal tariff (or 50% for Section 232 goods), the Merchandise Processing Fee at 0.3464% of customs value (capped at $614.35 per entry), and the Harbor Maintenance Fee at 0.125% for ocean shipments. Add the customs bond, typically 10% of duties and taxes for continuous bonds.

A $500,000 shipment of Japanese auto parts entering the US at the 15% framework rate: $75,000 in tariff, $614.35 MPF (capped), $625 HMF. Total before brokerage: $76,239.35. If those parts contain steel components subject to Section 232, the tariff on the steel portion jumps to 50%. CBP will flag any entry where the HTS code does not match the component materials.

We have seen importers get blindsided by retroactive dates. The Japan framework applies back to August 7, 2025. If you paid 25% on entries between August 7 and September 16, refunds are available. But you have to file. Unliquidated entries get Post Summary Corrections through your broker. Liquidated entries need a formal protest under 19 USC §1514, and the clock is ticking on those.

One operational detail. CBP updated HTSUS heading codes in September 2025. Products qualifying as not subject to Section 232 under the Japan deal need specific codes: 9903.02.72 for products already at 15% MFN, 9903.02.73 for products requiring a supplemental rate. Wrong code means overpayment (CBP will not tell you) or underpayment (CBP absolutely will).

Export controls run on a separate track from tariffs

Tariff rates change with executive orders. Export controls determine whether the shipment moves at all, and those run on a completely separate regulatory track. All three countries participate in the Wassenaar Arrangement, MTCR, Australia Group, and Nuclear Suppliers Group, with national control lists closely aligned to the US Commerce Control List.

For US exporters, License Exception STA (Strategic Trade Authorization) under 15 CFR §740.20 allows certain controlled items to reach Wassenaar-participating countries without individual licenses. All three qualify for Country Group A:5 under the EAR. But STA requires a written statement from the consignee confirming no diversion. Skip the consignee statement and the exception does not apply.

Re-export is where people get burned. A US-origin semiconductor manufacturing tool shipped to a Japanese facility, then moved to a Country Group D:1 destination? That still needs a BIS re-export license. We have seen companies assume re-export does not apply because the tool was modified at the Japanese site. It does. The 2025 Wassenaar update added quantum computing equipment and EUV lithography tools to the control list. These same items now appear under Japan Foreign Exchange and Foreign Trade Act and Taiwan Strategic High-Tech Commodities list.

Lenzo connects denied party screening with export control classification across all three jurisdictions, catching items that need a license before they reach the shipping dock.

FAQ

What is the current tariff rate on goods imported from japan to the US?

Most Japanese goods face a 15% combined tariff under the US-Japan Strategic Trade and Investment Agreement, retroactive to August 7, 2025. If a product MFN rate already equals or exceeds 15%, no additional reciprocal tariff applies. Steel and aluminum stay at 50% under Section 232. Copper faces the same rate. Civil aircraft parts and generic pharmaceuticals can qualify for 0%.

How do taiwan tariffs compare to japan and South Korea rates?

Taiwan reached a 15% cap under the Agreement on Reciprocal Trade signed February 12, 2026, matching Japan rate. South Korea was raised from 15% to 25% in January 2026 over a ratification dispute. Taiwan also secured exemptions on 1,811 industrial products, bringing its average effective rate to 12.32%.

What should US exporters know about exporting to South Korea under current conditions?

Rates jumped from 15% back to 25% in January 2026. The KORUS FTA preferential provisions are effectively overridden by IEEPA executive orders under Supreme Court review. US exporters of controlled technology need to comply with both EAR requirements and South Korea Strategic Technology Protection Act.

Are there refund opportunities for overpaid import duties from japan to usa?

Yes. The Japan framework applies retroactively to August 7, 2025. Importers who paid 25% between August 7 and September 16 can file Post Summary Corrections for unliquidated entries or formal protests under 19 USC §1514 for liquidated entries.

The legal basis for these tariff rates rests on IEEPA authority currently before the Supreme Court. A ruling against the administration could upend every rate discussed here. Lenzo trade compliance platform tracks tariff changes, classification updates, and denied party list additions across regulatory sources in all four jurisdictions.