Hormuz blockade pushes Japan toward full-scale energy crunch

Japanese newspaper Nikkei has recently published an article that offers a tightly interconnected picture of how a prolonged disruption in oil flows through the Strait of Hormuz is cascading across Japan’s industrial and service sectors. Its core argument is that what began as a geopolitical shock is now evolving into a structural supply constraint, exposing systemic vulnerabilities in Japan’s energy dependence.

At the centre of the analysis is the shift from price pressure to physical scarcity. Initially, rising crude prices drove up procurement costs for fuel oil and diesel. However, as the de facto blockade persists, the situation has escalated into reduced availability. Oil distributors are rationing supply, prioritizing long-term clients and cutting off opportunistic buyers. This marks a transition from a market-driven adjustment to controlled allocation—an indicator of deepening stress in supply chains.

Industrial disruption is already visible. JFE Steel shut down a thermal power unit due to fuel shortages, concluding that external electricity purchases had become more economical than self-generation. Meanwhile, Yamayoshi Seika temporarily halted production after failing to secure fuel oil, illustrating how even small- and mid-sized manufacturers are exposed to upstream energy shocks.

The article emphasises the breadth of impact: fuel oil and diesel underpin operations across factories, shipping, transport, and even public bathhouses. The temporary closure of a long-running hot spring facility underscores how disruptions are reaching consumer-facing sectors, not just heavy industry.

Transport and logistics are emerging as critical pressure points. Shipping firms face surging marine fuel costs—more than doubling since the onset of tensions with Iran—forcing partial pass-through to freight rates. Although companies like Nippon Yusen maintain operational continuity, their flexibility has diminished. Similarly, regional ferry operator Segawakisen has reduced services due to diesel shortages, prioritising essential commuters.

Energy security concerns are also intensifying. Chugoku Electric Power warns the situation could become critical if prolonged, particularly ahead of winter demand. J-Power has already reduced output at a major plant, signalling early-stage constraints in electricity generation.

The article highlights structural limitations within Japan’s energy system. Refinery utilisation has dropped as companies avoid producing surplus low-margin products, while inventories are declining across key fuels. Although national reserves provide a temporary buffer—roughly 60 days for jet fuel and fuel oil, and less than two weeks for gasoline and diesel—these are finite safeguards. Moreover, technical constraints limit the ability of refineries to rebalance output toward more critical fuels.

A key insight in the original reporting is the asymmetry in resilience: large, established buyers with stable supplier relationships retain access, while smaller or more flexible buyers are squeezed out. This introduces distortions not only in pricing but also in market access, amplifying economic inequality across sectors.

Overall, Nikkei frames the crisis as a “worst-case scenario” materialising. If disruptions persist beyond three to four months, the impact will broaden from current fuel categories to aviation fuel and kerosene, potentially affecting mobility and heating. The article ultimately portrays Japan’s near-total reliance on imported energy as a strategic vulnerability—one that transforms external geopolitical shocks into immediate domestic economic strain.

By Tamilla Hasanova