Demographic Ceiling Limits Japan's Economic Growth

Japan's population is expected to decline by more than 30% over the next three to four decades, according to projections. This demographic ceiling has significant implications for Japan's economy and currency. The Bank of Japan faces a difficult choice between defending the yen and defending the bond market.

James Stanley, Senior Strategist at StoneX Media, explains that if Japan's population declines by 33%, GDP per capita must rise by 50% just to keep output flat over a 30-year period. This arithmetic constraint sets the ceiling on everything downstream and has already been affecting Japan's economy.

The yen's weakness is not solely due to policy errors, but rather structural conditions, including a declining population and rising domestic inflation. A weaker yen makes Japanese goods cheaper for foreign buyers, boosting exports. However, this also carries political support in Tokyo even as it builds the imported inflation problem that eventually forces the Bank of Japan's hand.

Rising Japanese long-dated yields have been pushing the Bank of Japan toward action to control the decline of the yen. The bank and the Ministry of Finance want a controlled decline rather than a disorderly one, which would risk inflation running away and take the rate decision out of their hands.