🇯🇵 Japan vs 🇰🇷 South Korea Tariffs — Import Duty Comparison (2026)

Comparing import tariffs between Japan and South Korea reveals key differences that can significantly impact landed costs for US importers.

Both countries face the same base tariff rate of 10% on most goods entering the United States.

Both countries export Motor vehicles, Machinery, Auto parts, Plastics, and 1 other overlapping categories to the United States, creating direct competition in these sectors.

In terms of trade volume, Japan accounts for approximately $218B in bilateral trade with the US, exceeding South Korea's $169B.

Both countries are subject to the Section 301 forced-labor tariff that replaced the flat 10% Section 122 rate on July 24, 2026 — a two-tier 10%/12.5% duty on roughly 60 economies (about 99.4% of US imports by value), broader than the earlier 46-country proposal. Section 122 had itself replaced the IEEPA tariffs struck down by the Supreme Court. In August 2026, 25 states sued to block the forced-labor tariff, but CBP continues collecting it while the case proceeds.

Japan's advantages include: Higher US trade volume ($218B vs $169B); Unique export categories: Electrical machinery, Medical instruments, Optical instruments. South Korea's advantages include: Trade agreement: KORUS (duty-free on qualifying goods); Exempt from Section 232 steel/aluminum tariffs; Unique export categories: Semiconductors, Petrochemicals, Ships.

With equivalent base tariff rates, the choice between Japan and South Korea depends primarily on product-specific duties, shipping costs, lead times, and supply chain considerations rather than the base tariff rate.