The Bank of Japan April Rate Hike Fades Amid Middle East Shock

On Friday, April 16, the Bank of Japan’s April rate hike probability plummeted from 57% to 31% in just four days. The Middle East’s announcement of Hormuz Strait closure and surging crude prices have fundamentally shaken the central bank’s monetary policy decisions. This probability collapse represents far more than market expectation adjustment—it marks a critical inflection point where Japan’s structural monetary policy contradictions are becoming exposed.

Since autumn of last year, the Bank of Japan has pursued gradual rate increases under the banner of “ending deflation.” Real wages had finally begun rising, and inflation had stabilized above 2%, supporting the case for tightening. However, this judgment rested on a critical assumption: crude oil would remain stable around $100 per barrel. Today, crude has reached $185, with scenarios exceeding $200 now becoming increasingly realistic. Confronted with this abrupt shift, the Bank of Japan’s traditional monetary policy framework has become completely dysfunctional.

The Bank of Japan’s dilemma is extraordinarily severe. If it raises rates, it will face stagflation: both the inflation resulting from oil-driven cost pressures and contraction in growth. If it delays rate increases, already-abundant market liquidity will expand further, risking even greater long-term price escalation. In essence, both paths inflict economic damage—a genuine “no-win” scenario.

This crisis illuminates why the Bank of Japan considered April rate increases in the first place. The central bank’s monetary easing from 2022 to 2023 rested on the conviction that Japan uniquely retained a “deflationary bias” even as global inflationary pressure mounted. In reality, Japan—like the world—faced supply constraints and demand excess generating inflationary pressure. The Bank of Japan miscalculated. Or perhaps deliberately looked away.

Japan’s labor market, though appearing “tight,” actually reflects a rise in precarious employment rather than robust job creation. Regular employment remains flat while growth concentrates in dispatch work, contract positions, and part-time labor—none of which see genuine wage increases. Aggregate wage statistics appear to rise because lower-paid retirees exit wage surveys while newly hired workers with relatively higher compensation enter, creating a “compositional effect” rather than true wage growth.

The mortgage market has become the “trigger point” for Bank of Japan policy consequences. Approximately 60% of Japanese mortgages carry variable or short-term fixed rates. These households face the most direct impact from rate increases. Banks have already begun notifying borrowers of rate adjustments, with monthly payments rising by 2,000 to 5,000 yen for affected households.

Particularly concerning are households aged 35 to 50—those who borrowed during the “near-zero” rate era when property prices were elevated. Many borrowed when rates approached zero on already-high property valuations. Current rate increases from near-zero to 1–1.5% mean monthly payments rise by 5–10% effectively. For families already squeezed by education expenses and elder care costs, this additional burden becomes catastrophic.

If the Bank of Japan postpones April rate hikes, a different problem emerges. Markets will interpret this as continued easing, pushing the yen lower. Yen weakness accelerates import price inflation—gasoline, food, and essentials. Given Japan’s food self-sufficiency below 40%, impacts are direct. Thus, skipping rate hikes accelerates inflation while raising rates damages growth. Either choice worsens household living standards.

Government policymakers are equally perplexed by response options. The Finance Ministry references petroleum reserve releases and continued gasoline subsidies—temporary palliatives rather than structural solutions. Should crude stabilize above $200, government subsidies alone become insufficient.

A deeper structural issue dominates: Japan exhibits extreme resource dependency. Oil, natural gas, food, minerals—virtually all strategic resources depend on imports. Since the 1970s, Japan pursued energy efficiency and technological innovation to reduce this dependence. But Japan’s mature economy has reached efficiency limits, with efficiency improvements delivering only 1–2% annual gains. Crude rising 30% annually cannot be matched by technology.

Monetary policy functions as an instrument for managing domestic supply-demand balance. But external shocks like crude price surges lie beyond central bank control. Instead, confronting such shocks requires clearly communicating the limits of policy effectiveness. Current Bank of Japan communications lack this clarity.

Between Friday, April 16, and Sunday, April 20, rate hike probability shifted dramatically. Behind this movement lies market doubts: “Does the Bank of Japan truly intend to raise rates?” In other words, the central bank’s message credibility is eroding.

Families carrying mortgages face extraordinarily difficult decisions amid this uncertainty. Will variable rates rise or hold? That choice reshapes life plans. Some families rush to refinance into fixed-rate mortgages, creating queues at bank branches.

Whatever the Bank of Japan decides on April 21 represents merely one moment. The fundamental issue is that Japanese economy is entering “low growth with high inflation”—a scenario never before experienced. This challenge exceeds central bank capacity alone. Fiscal policy, energy policy, and industrial policy must function in concert.

While awaiting April 21, millions of Japanese families grip calculators, revising life plans. Children’s education, elder parents’ care, monthly payments—all face pressure from rapidly shifting reality. How far will planned trajectories actually extend? How will a single central bank policy decision ripple through these families’ lives? The answer cannot be computed through economic models. Rather, it requires testing policymakers’ determination and sense of responsibility.