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Japan Q3 aluminium prices soar highest since 2015 due to Mideast supply squeeze

Five sources said that Japanese aluminium buyers paid a premium of $395 per ton between July and September. This was the highest price since 2015. The U.S./Israeli war against Iran has squeezed the supply.

Japan is the largest Asian importer and benchmark for the region. Its premiums on primary metals are set at a level that exceeds the London Metal Exchange cash price each quarter.

The premiums agreed to are up from $350-$353 per ton in April-June, the third consecutive increase. This is the highest since $425 between January and March 2015.

As tensions ease, producers cut their offers

Sources said that global producers sought to sell shipments from July to September for $460 to $480 per ton in late May. This was an increase of 30% to 37% over the previous quarter. However, they gradually reduced their offer to $395 before finally settling on this price.

Sources at a Japanese rolling-mill said that the deals were made after producers reduced their offers, as Middle East tensions eased. "The terms were accepted by buyers once the offers dropped below the psychologically significant $400 mark."

Sources at a Japanese Trading House said that the agreements were reached this week, after producers made concessions in order to lower offers below $400.

Sources declined to identify themselves because the discussions were private.

The war-related closure of the Strait of Hormuz has affected?supplies of aluminium from the Middle East. This region accounts for 9% of the global smelting capacities of aluminum. It also curbed the shipments of raw material needed to make the metal. In 2025, Japan imported?nearly 30 percent of its aluminum ingots, including alloy and primary metal, from this region.

Two Gulf smelters were directly hit by missile strikes during the conflict.

A series of announcements made last week regarding the restarting of supply has put pressure on metal prices. A'more durable ceasefire, and the return of shipping in the Strait have largely eliminated the war-related premium.

Even so, there are still concerns about the fragility and the risk of a new supply disruption after the U.S.'s latest strikes on Iran.

Aluminum stocks at Japan's three main ports According to Marubeni's June data, exports fell by 4.2% compared to a month ago to reach 238,900 tons, the lowest level in almost a decade.

(source: Reuters)