Japanese petroleum refiners are turning to Nigerian crude oil supplies as the ongoing Iran conflict disrupts Middle Eastern export routes that have long dominated the country's energy imports. The shift underscores the immediate logistical and technical hurdles Tokyo faces in diversifying its crude sourcing overnight.
Industry data from the Petroleum Association of Japan shows refinery runs operating at just 67.8% of designed capacity for the week ending April 11. That figure barely moved from the prior week's 67.7% utilization, and sits well below the more than 80% operating rates recorded before the conflict erupted in late February.
Middle Eastern crudes traditionally comprise approximately 95% of Japan's total crude imports, with most flows transiting the Strait of Hormuz—a maritime chokepoint now under threat from the regional conflict. Japan has begun drawing from its national strategic petroleum reserve and has secured alternative supply arrangements covering more than half the volume that passed through Hormuz in May of last year, according to government officials.
However, the country's refining infrastructure presents a fundamental constraint. Japanese processing complexes were engineered to handle medium-sour crude grades prevalent in Middle Eastern production. This technical limitation caps how quickly refiners can pivot to other crude streams.
"Japan could likely push non-Middle East crude to around 30-50% of its slate in the short term. But fully replacing Middle Eastern supply is difficult," said Nithin Prakash, an analyst with energy research firm Rystad Energy.
Beyond Nigeria, Japan is increasing purchases from Malaysia, Azerbaijan, Brazil, and Angola. Refiners can blend Middle Eastern grades with light-sweet crudes from West Africa and the United States, alongside medium grades from the Caspian region and parts of Latin America. This shift carries downstream implications: the new crude mix will boost gasoline and naphtha yields while reducing output of diesel and jet fuel, Prakash noted.
The Petroleum Association of Japan has suspended its regular publication of national petroleum product stock levels, citing the supply structure upheaval. The outlook for May could improve as contracted替代 shipments begin flowing, but industry observers expect operational rates to remain depressed until alternative routing stabilizes.