Ueda: Initial conditions key to oil shock inflation
Bank of Japan Governor Kazuo Ueda reviewed Japan's five-decade experience with major oil price shocks, highlighting how initial economic conditions shaped their inflationary impact. Speaking at the 2026 BOJ-IMES Conference, he emphasized that central banks must consider wages, expectations, and exchange rates, not just oil prices in isolation.
Five decades, varied outcomes
Governor Ueda outlined Japan's experience with five significant energy price spikes since the 1970s: the first oil shock (1973), the second oil shock (1979), the mid-2000s surge, Russia's invasion of Ukraine (2022), and the recent Middle East conflict.
He noted that the response of Japan's consumer price index (CPI) varied considerably across these episodes.
The 1973 shock led to a typical wage-price spiral with inflation reaching 20-30 percent, exacerbated by already high inflationary momentum and inadequate monetary policy.
In contrast, the 1979 shock resulted in far more moderate inflation due to prompt policy response, restrained wage behavior, prior yen appreciation, and improved energy efficiency.
The mid-2000s surge saw inflation remain low, with core inflation often negative, as Japan was in a deflationary equilibrium.
The recent episode, starting around 2021, saw broader price increases and rising wage growth, shifting Japan away from its deflationary norm, though not into a 1970s-style spiral.
Beyond the oil price shock
Ueda emphasized that initial conditions critically determined the inflationary impact of each shock.
The 1973 shock was amplified by pre-existing inflationary momentum and a developing wage-price spiral.
In contrast, the 1979 shock benefited from lower initial inflation, restrained wage behavior, prior yen appreciation, and structural adjustments.
The mid-2000s saw a deflationary equilibrium where firms were reluctant to raise prices and wages were weak.
The recent episode, however, was characterized by a broader shock (energy, food, logistics), yen depreciation, a tighter labor market, and a shift in price and wage norms, leading to more persistent inflation.
No simple playbook for oil shocks
Japan's experience demonstrates that oil price shocks are never isolated events; they test the entire inflation regime.
The boundary between temporary and persistent inflation is not mechanical, depending heavily on initial conditions like wages and expectations.
Central banks must therefore adopt a holistic view, recognizing that the same shock can have vastly different effects.