The Japanese yen’s decline has accelerated beyond its well-documented slide against the US dollar, with the currency’s broader trade-weighted value also deteriorating sharply.

This broad-based depreciation is intensifying concerns among market participants that imported inflation pressures are mounting across the Japanese economy, potentially forcing the Bank of Japan to reconsider its cautious monetary stance.

While headlines have focused on the yen breaking through the ¥162 threshold against the greenback—a four-decade low—the Bank of Japan’s nominal effective exchange rate (NEER) is now signaling a more systemic loss of value.

The NEER, which measures the yen against a basket of major trading partners, has fallen in tandem with the dollar pair, suggesting the weakness is not merely a function of US strength but a fundamental reassessment of Japanese assets.

This development complicates the outlook for Tokyo policymakers.

The BoJ has long balanced the need to support economic growth with the risk of imported inflation eroding household purchasing power.