Japanese refiners source roughly 95 percent of their crude oil from Middle Eastern producers. Of that flow, approximately 70 percent transits the Strait of Hormuz. Japan also imports about 6 percent of its liquefied natural gas from Qatar and the United Arab Emirates. Those numbers make Japan one of the world’s most Hormuz dependent large economies by pure proportional exposure, second only to a handful of Asian peers. Any sustained disruption at Hormuz is a direct and measurable threat to Japanese energy security.<\/p>\n
Japan has been notably quiet through the crisis. No high profile prime ministerial statements. No public coordination at the UN. No visible participation in the Paris summit on 17 April. Korean officials, Indian officials, and European officials have all used the crisis as an occasion for public positioning. Tokyo has not. The contrast is stark, and understanding the silence is useful.<\/p>\n
Several reasons stack together, and together they explain the posture.<\/p>\n
The first reason is that Japan has been preparing for a Hormuz incident for decades and has quietly accumulated the reserves and diversification that make short term public statements unnecessary. Japan’s strategic petroleum reserves hold approximately 500 million barrels, representing several months of consumption. The Japanese government has standing authority to release reserves when prices exceed certain triggers. Japanese refiners maintain preemptive inventory buffers that exceed the levels held by any Asian peer. A Japanese refinery running today is running on crude that was landed before the crisis began, and it can continue to do so for months without any policy change.<\/p>\n
The second reason is structural. Japan’s post war energy policy has produced one of the most diversified import portfolios in the OECD. Of the 95 percent Middle Eastern dependence, Japan spreads its buying across Saudi Arabia, Kuwait, the UAE, Qatar, and Oman, rather than concentrating on any one supplier. That diversification within the Gulf is useful, but it does not help when the chokepoint itself is the binding constraint. Even well diversified Gulf sourcing all exits through Hormuz.<\/p>\n
The third reason is diplomatic. Japan has longstanding commercial ties with Iran in addition to its alliance with the United States. Tokyo’s posture during the 2019 to 2020 Gulf tensions was to quietly mediate rather than publicly take sides. The Abe visit to Tehran in 2019 was a signature expression of that posture. The current Japanese government, less visibly, is doing something similar. Public silence is the form that active quiet diplomacy takes.<\/p>\n
Japanese reserves are deep but they are not infinite. Three forcing events are approaching that will almost certainly change the posture from quiet preparation to public engagement.<\/p>\n
QatarEnergy declared force majeure on certain LNG contracts on 24 March, following the Iranian strikes on Ras Laffan and Mesaieed facilities. Japanese utilities are among the counterparties affected. Korean utilities are also affected, holding roughly 3.5 million tonnes of LNG reserves, equivalent to only two to four weeks of stable demand at current consumption. Japanese reserves are deeper than Korean reserves but the winter heating season begins in the Northern Hemisphere in seven months, and LNG storage refills begin in early summer. The current crisis is interrupting the refill cycle. That is a structural problem that cannot be fully mitigated by existing inventories.<\/p>\n
Japanese refinery runs will begin to pressurise as inventory erodes. Delivered crude costs are already elevated by freight premium. Refining margins in Japan are thinner than in India or China because of the high fixed cost base of the Japanese refining industry. A three month extension of current conditions is a refining profitability problem even before it becomes a national supply problem.<\/p>\n
Japanese flagged tonnage and Japanese crewed vessels are transiting through Hormuz right now. The firing on Indian flagged vessels today sets a precedent that applies to Japanese tonnage equally. Any incident involving Japanese flagged vessels would immediately end the diplomatic silence.<\/p>\n
When Japan does engage publicly, the contribution will be distinctive. Japan has operational experience in counter piracy escort missions through the Gulf of Aden since 2009. The Japan Maritime Self Defense Force runs a dedicated anti piracy task force operating out of Djibouti. The Japanese coast guard has decades of experience coordinating pilotage and VTS for vessels transiting the Straits of Malacca. The technical capability to contribute escort, coordination, and anti mine services to a multilateral Hormuz mission exists in Japan today, ready to deploy.<\/p>\n
Japan also brings substantial financial capacity. The country has historically been a major financial contributor to international maritime safety initiatives, including IMO funding and regional VTS systems. A Hormuz maritime authority that is designed to be funded through user transit fees still requires startup capital and political legitimacy. Japanese support would provide both in a way that few other participating states could match.<\/p>\n
The window during which Japanese silence is an effective strategy is closing. The deeper the crisis becomes, the stronger the case for public Japanese engagement. The longer Japanese engagement waits, the higher the domestic political cost of eventually engaging.<\/p>\n
Watch for the first high level statement from the Japanese Prime Minister’s office. Watch for any announcement of Japanese participation in Paris initiative working groups. Watch for any change in the Japan Maritime Self Defense Force’s Gulf of Aden mission posture. These are the signals that the posture is shifting. When they arrive, the Hormuz crisis enters a new phase in which the world’s third largest economy is publicly invested in chokepoint governance.<\/p>\n