As the conflict in the Middle East persists, concerns over energy security are accelerating Japan’s efforts to reduce its dependence on Middle Eastern crude, presenting opportunities for US crude exporters.
Before the conflict, Japan was sourcing around 95% of its crude imports from the Middle East. This leaves it heavily exposed to disruptions to the Strait of Hormuz, through which almost all of this oil passes.
The government has been studying several measures to mitigate this exposure, including supporting the development of Middle Eastern pipeline infrastructure that bypasses the Strait of Hormuz and drawing on and replenishing Japan’s strategic petroleum reserves. More importantly for crude suppliers outside the region, Japan is preparing a support package designed to make supply diversification commercially and technically viable for domestic refiners.
The first outline of the package is expected by the end of August, although detailed implementation measures will likely follow later. Our outreach suggests a central component will be financial support for refiners to increase their capacity to process non-Middle Eastern crude and to diversify naphtha procurement.
Government Support Will Address Technical and Cost Constraints
Japanese refineries have historically been configured to run predominantly on Middle Eastern crude. Pivoting away from these grades of crude, while maintaining the desired product mix, therefore involves more than sourcing replacement barrels—it also requires refiners to invest in process and equipment changes to accommodate crude with different qualities and yields.
Currently, Japanese refiners can generally blend relatively limited volumes of alternative crude without significant modifications. In light of the Hormuz disruptions, some refiners have sought to increase these volumes, but technical and economic constraints have limited their ability to do so at scale. Our research suggests the practical limit on blending in non-Middle Eastern crude (or strategic reserve stock) is 10%-20% based on existing refinery configurations, and this has been closer to 10% in recent months.
This means meaningful diversification will likely require not only ongoing support for the higher costs of sourcing alternative barrels, but also upfront refinery investment. The government’s package is therefore expected to address two areas:
1. CapEx support for refinery modifications. The government is expected to provide funding for investments that allow refiners to process a higher proportion of non-Middle Eastern crude. Japanese government support for comparable projects has typically covered up to around 50% of eligible expenditure. In this case, our outreach contacts informed us that industry is advocating for support of up to two-thirds of the required CapEx, as the initiative is non-voluntary and offers limited commercial incentive, given it is primarily intended to strengthen national energy security.
2. OpEx support to reduce the cost disadvantage of alternative crude. Japan’s Ministry of Economy, Trade and Industry (METI) initially focused on compensating importers for the incremental insurance, freight, and transportation costs associated with sourcing crude that does not transit Hormuz. However, our contacts suggest refiners have been pushing for a broader definition of eligible costs, arguing that the cost differential between Middle Eastern and alternative crude extends beyond freight alone. To finance the scheme, the government is considering a cost-sharing arrangement whereby refiners and trading houses would contribute to a fund administered by the state-owned Japan Organization for Metals and Energy Security (Jogmec), which would support approved diversification projects based on economic efficiency and their contribution to supply diversification. A working group was established in late July to develop the scheme.
The expected end-August announcement should be viewed as the beginning, rather than the conclusion, of the policy process. It is likely to establish the broad contours of the funding mechanism, with subsequent decisions determining subsidy levels, eligible costs, and implementation requirements.
One key aspect under discussion, per our outreach, is whether the government will establish indicative targets for the share of non-Middle Eastern crude in refiners’ feedstock. These would likely be non-binding, but could provide an important signal on the scale of diversification Tokyo expects from the industry.
The government’s objective does not appear to be the wholesale conversion of a small number of refineries away from Middle Eastern crude. Instead, it appears to be seeking greater flexibility across the refining system, such as enabling selected refiners to raise their blending limit for non-Middle Eastern crude above 20%. Such capacity would give Japan a substantially larger supply buffer in the event of further disruption to flows through Hormuz.
US and Other Non-Middle Eastern Crude Suppliers Stand to Benefit
If the final package meaningfully subsidises both refinery conversion costs and the ongoing costs of sourcing alternative crude, it will bolster the competitiveness of non-Middle Eastern barrels in Japan.
This creates an opportunity for exporters, particularly in the US, to establish long-term offtake relationships with Japanese refiners and trading houses. US crude is particularly well-positioned in the context of Japan’s broader economic relationship with the US. Tokyo is seeking to increase purchases of US goods and investment in strategic US industries, including energy, as part of its economic commitments to Washington. An increase in US crude imports would therefore advance two Japanese policy objectives simultaneously: reducing dependence on Middle Eastern supply and increasing energy-related economic engagement with the US.
The size of the opportunity will ultimately depend on the final design of the support package—particularly the level of CapEx subsidies, the extent to which OpEx costs are supported, and any indicative diversification targets set for refiners. A sufficiently generous package would shift non-Middle Eastern crude from an emergency diversification option toward a more persistent component of Japan’s crude mix.
Capstone will continue to monitor developments and emerging opportunities for our clients.
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