The Bank of Japan raised its policy interest rate from 0.75 to 1.0 percent this week, its highest level since 1995 — a 31-year peak. The move was driven primarily by the surge in global energy prices linked to the US-Israeli military campaign against Iran, which has exposed Japan’s acute dependence on Middle Eastern oil and gas. Japan’s wholesale price growth reached 6 percent year-on-year in May, the fastest in three years, and the Bank of Japan has warned that medium-to-long term inflation risks are skewed to the upside. The rate decision was made in the absence of Governor Kazuo Ueda, who was hospitalised for an infected liver cyst, by a deputy-led board that nonetheless moved decisively. The hike is the second since Prime Minister Sanae Takaichi took office — notable given that Takaichi had historically opposed rate increases as a proponent of fiscal expansion.
The received wisdom
Most commentary has framed this as an unambiguous normalisation: Japan is finally, belatedly, emerging from two decades of deflationary stagnation. The country slashed rates in the 1990s after the collapse of its property and equity bubble, and for most of the subsequent twenty years operated at effectively zero rates — a policy designed to stimulate lending, investment, and price growth that chronically failed to achieve its own targets. Japan economist Jesper Koll captured the consensus view: “After twenty years of deflation, Japan is now in an inflationary upcycle. Emergency/crisis management monetary policy is no longer needed.” The yen, which has been chronically weak against the dollar and euro, is expected to benefit marginally from higher rates — a relief for Japanese consumers whose purchasing power has been eroded by expensive imports. The Bank of Japan, in this framing, is simply doing what any competent central bank does when inflation threatens: remove excess accommodation and return to a neutral stance. That it has taken three decades to reach a rate that most developed economies would consider low only underscores how unusual Japan’s post-bubble predicament was.
A different read
The normalisation narrative is partly correct but glosses over a structural problem that higher rates will not solve and may actively aggravate. Japan carries one of the largest public debt-to-GDP ratios in the developed world — a consequence of two decades of fiscal stimulus programmes that the zero-rate environment made sustainable precisely because the government’s borrowing costs were negligible. As rates rise, debt service costs rise too. Japan’s government has been able to roll its enormous debt burden at near-zero cost for so long that the fiscal arithmetic of even a modest rate increase is significant. UC San Diego’s Ulrike Schaede notes a “sense that the yen is too cheap and that raising its currency will not hurt” — a confidence that may prove premature if higher rates choke the domestic demand that has been Japan’s most reliable recent growth driver.
The deeper issue is the cause of the current inflation. Japan’s 1.4 percent overall inflation rate is still below the Bank of Japan’s 2 percent target, but wholesale prices growing at 6 percent annually tell a different story about imported cost pressures. Japan does not produce significant quantities of oil or gas; it imports most of what it needs, and the US-Iran war has sent energy prices sharply higher across the region. The Bank of Japan is raising rates in response to an inflationary shock that monetary policy cannot cure — because no amount of tightening in Tokyo will reopen the Strait of Hormuz or reduce the cost of Middle Eastern crude. What higher rates can do is slow domestic demand, increase the cost of carrying Japan’s vast public debt, and potentially trigger another yen appreciation cycle that damages export competitiveness. The government has partially mitigated this with household fuel cost measures, but those are fiscal transfers, not a structural solution.
There is a broader global dimension worth noting. Schaede suggests that Japan’s move could signal “a slow global realignment” in monetary policy. The Fed is holding steady but conducting a structural review under Kevin Warsh that leans hawkish. The Bank of England has kept rates above 3 percent. Australia has signalled possible further hikes. For most of the post-2008 period, the world operated under a de facto monetary consensus: rates close to zero, central bank balance sheets expanded massively, and the cost of government borrowing kept artificially suppressed. That consensus is fracturing. The argument for the managerial class’s preferred model — that technocratic central bankers could manage the business cycle without painful fiscal trade-offs — rested on the assumption that cheap money was effectively costless. Japan’s experience over the past three decades, now culminating in a rate hike driven by an exogenous energy shock, suggests it was not costless at all: it stored up structural fragility, deferred necessary corporate restructuring, and left governments unable to raise rates without confronting a debt-service problem that zero rates had been papering over.
For investors, the immediate effect is straightforward. Higher Japanese rates make yen-denominated assets relatively more attractive, will continue to unwind the famous yen carry trade — in which investors borrowed cheaply in yen and invested in higher-yielding currencies — and will ripple through Asian currency markets. For ordinary Japanese households, the calculus is more mixed: higher rates mean higher mortgage costs for those who borrowed at variable rates during the zero-rate era, offset partially by better returns on savings that have earned virtually nothing for a generation. The Japan story, in short, is not simply a success story of normalisation. It is a cautionary tale about the consequences of relying on monetary policy to do work that only structural reform can accomplish — and then discovering that the exit from that policy is itself a source of risk.
What to watch
Watch the yen’s movement against the dollar and the euro over the coming weeks — sharp appreciation would signal that the carry-trade unwinding is accelerating, with knock-on effects for Asian equity markets. Watch whether the Bank of Japan signals further rate increases at its next meeting, particularly if global energy prices remain elevated following the Iran MOU negotiations. Watch how the Japanese government responds to rising debt service costs in its next supplementary budget. And watch whether Prime Minister Takaichi, who has historically favoured stimulus, publicly accepts the BOJ’s course or begins applying political pressure on the deputy-led board.
— J