Japan's LNG Supply Math Tightens as Hormuz Crisis Removes Qatar Swing Volumes

Japan's LNG Supply Math Tightens as Hormuz Crisis Removes Qatar Swing Volumes Australia supplies 26 Mt of Japan's LNG annually, but the Hormuz closure has eliminated Qatar's swing capacity with no pipeline substitute. The ICE Endex TTF front-month climbed 1.70% to €55.30/MWh on Thursday (2026-07-16), while the JKM benchmark for Asian LNG held at $19.93/MMBtu, as markets continued to price constrained Middle East supply into forward curves. [LIVE PRICES] The effective closure of the Strait of Hormuz, triggered by the Iran war and damage to Qatar's export infrastructure, has removed a key source of LNG swing supply from Asia with no direct substitute available.⁶ Japan imported 66.3 Mt of LNG in 2025, down 1.5% year-on-year, retaining its position as the world's second-largest buyer after China.² Around 6% of that supply transits the Hormuz from Qatar and the UAE, while 26 Mt — the dominant single-source share — comes from Australia.² Australian LNG shipments were themselves already down 2.8% year-to-date in 2025 compared with the same period the previous year, LSEG seaborne data show, leaving Canberra further behind the US and Qatar in the global export ranking.⁴ A gas analyst told Montel on Thursday (2026-05-21) that LNG's reputation for supply flexibility is being tested precisely because a switch to pipeline flows is not an option, unlike for oil.¹ The Hormuz blockade removes not just Qatari volumes but the cargo optionality that had allowed buyers to reroute supply when individual terminals faced disruptions. The supply chain pact inked by the prime ministers of Australia and Japan on Tuesday (2026-05-19) addresses longer-term energy security and critical minerals, but offers nothing for the immediate logistics problem.⁵ Japan's domestic energy structure amplifies the pressure. Around 98% of its gas demand is met by LNG imports, with overall consumption declining in recent years due to slower economic growth, renewables expansion, and a gradual nuclear restart.² Natural gas accounts for approximately 32% of power generation, followed by coal at 28% and nuclear at 9%, with the power sector absorbing roughly 55-65% of total gas consumption.² With roughly 90% of its crude oil sourced from the Middle East, Tokyo has already released around 80 million barrels from strategic petroleum reserves — equivalent to roughly 26 days of domestic oil demand — to stabilize fuel balances.² Japan covers nearly 100% of its gasoline demand through domestic refining, limiting immediate refined product exposure.² The picture is more precarious for Australia: direct petroleum imports through the Hormuz account for around 15% of the country's oil supply, and the refinery network is thin, with two aging facilities contributing only 20% of total domestic fuel products.³ The rest comes from refined product imports out of Asian refineries, which themselves depend on the Hormuz for 40% to 70% of their crude feedstock.³ More than 50% of Australia's refined fuel products are ultimately exposed to the closure through that chain.³ The positioning picture for JKM remains split. The overall lean in market signals is bearish, but the contrarian case is clustered specifically around supply and geopolitical drivers for the JKM spot price. A pipeline backup does not exist for LNG, as the Montel analyst noted on Thursday (2026-05-21), and price discovery will stay sensitive to any sign that the Atlantic basin is diverting additional cargoes eastward.¹ The US routes only around 7% of its oil imports through the Hormuz and is less directly exposed than Japan or Australia.³ Its LNG cargoes must still compete for Asian buyers in a market where Qatari swing volumes have been curtailed. Commonwealth LNG's proposed Cameron Parish project is now fully subscribed, with Mercuria adding 0.5 mtpa to bring total offtake to 8.5 mtpa, reducing the pool of uncommitted US capacity that Asian buyers might otherwise access.⁷ The more consequential calculation for Japan involves the coal-gas switching level in its power sector. Gas at 32% of generation and coal at 28% means the two fuels are competing directly, and the margin between them narrows as JKM rises.² If supply constraints push the Asian benchmark higher through the summer months, utilities face a straightforward choice: increase coal burn, accelerate nuclear restarts, or absorb the premium. The next concrete signal will be the Australian LNG loading schedule for August and any indication from major Japanese utilities on whether spot cargo demand is rising to offset the Qatari shortfall.