Trump Administration Proposes 12.5 Percent Tariffs on Japanese Imports Under Section 301 Forced Labor Investigation
Listeners, welcome to “Japan Tariff News and Tracker,” where we break down how U.S. trade moves under President Trump are reshaping the landscape for Japan.
The big headline this week comes from the Office of the U.S. Trade Representative. According to a June 2 announcement reported by the National Roofing Contractors Association’s “This Week in D.C.” update, the Trump administration has proposed new Section 301 tariffs targeting imports from 60 trading partners after an investigation into forced-labor practices. Under this proposal, most products from Japan that are linked to forced-labor concerns would face a tariff rate of about 12.5 percent. Japan is grouped with China, India, Switzerland, and others at this higher 12.5 percent tier, while many other partners face a 10 percent rate.
A client alert from the law firm Dorsey & Whitney explains that, across all affected partners, the proposal sets 10 percent tariffs for 15 countries and 12.5 percent tariffs for 45 countries, with some limited exemptions for specific agricultural products, aviation parts, industrial inputs, minerals, and pharmaceuticals. For listeners in Japan or those exporting from Japan into the U.S., the key takeaway is that a broad range of Japanese-origin goods implicated by the investigation could soon be facing that 12.5 percent duty at the U.S. border.
These new tariffs are designed to replace earlier Trump measures that courts struck down. “This Week in D.C.” notes that the administration is effectively rebuilding its tariff architecture after the Supreme Court invalidated Trump’s 2025 emergency tariff program and after a 10 percent global tariff imposed in February 2026 was ruled unlawful by the Court of International Trade, though that global tariff is still in place pending appeal. That 10 percent global tariff is also scheduled to sunset in July unless Congress extends it, which observers currently do not expect.
On a parallel track, President Trump has just adjusted metal tariffs that indirectly affect Japanese-connected supply chains. Holland & Knight and BDO USA both report that a June 1 Trump proclamation modifies Section 232 tariffs on aluminum, steel, and copper and their derivatives. The proclamation lowers certain metal derivative tariffs from 25 percent to 15 percent for products like agricultural machinery, HVAC equipment, and construction and mining equipment. While this change is not Japan-specific, Japanese firms that supply components or invest in U.S.-based manufacturing using imported steel and aluminum derivatives could see some relief in intermediate costs, even as finished goods from Japan face higher Section 301 duties.
For Japanese exporters, the combined effect is a more fragmented, sector-by-sector tariff map: a proposed 12.5 percent Section 301 rate on targeted goods tied to forced-labor concerns, a still-active but legally vulnerable 10 percent global tariff that may expire soon, and a separate metal tariff regime under Section 232 with tiered rates of 50, 25, 15, and, in some cases, effectively 10 percent depending on product and origin.
As these proposals go through a public comment period and hearings at USTR, Japanese companies and their U.S. partners will be watching closely to see which product lines stay at 12.5 percent, which win exemptions, and how quickly the new tariff structure replaces the contested global measures.
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