A weaker yen can be good news for some Japanese exporters while making imported fuel, food and industrial materials more expensive in yen terms. That is why the exchange rate matters far beyond currency traders. In September 2026, Japan's corporate goods prices were reported to be rising strongly, and yen-denominated import costs were up sharply from a year earlier.
The transmission to consumers is not immediate. Importers may have hedged exchange-rate exposure, retailers may draw down inventories bought at older prices, and businesses may choose to absorb higher costs temporarily. On the other hand, prolonged currency weakness can put pressure on supermarket shelves, restaurant menus and transport expenses.
Japan faces a trade-off. A cheaper yen can support revenues from exports and overseas earnings, but it can reduce domestic purchasing power for people whose incomes are earned in yen. The Bank of Japan has to judge how imported price pressure interacts with domestic wages and spending; it cannot target every movement in the foreign-exchange market.
DISCUSSION: In Japan's current circumstances, is a weaker yen more helpful to exporters than harmful to households?