The Short Version
The core assertion is supported: the United States imposed a 25% Section 232 tariff on steel from Japan starting in 2018. The main caveat is that, from April 2022, Japan received a tariff-rate quota allowing specified volumes to enter duty-free, with the 25% duty generally applying to over-quota imports. So the claim is accurate in broad terms, but it overstates continuity if read as applying to all Japanese steel throughout the entire period.