Japan's data-centre boom draws DEME into its first offshore wind installation deal

Japan's data-centre boom draws DEME into its first offshore wind installation deal A Belgian contractor's first Japanese deal opens a new front in the race to power Asia's fastest-growing data-centre market. A Belgian marine contractor has won its first contract to install offshore wind turbines in Japanese waters, with the financial terms left undisclosed.⁷ The deal matters because Japan's power demand is about to climb faster than any single fuel can comfortably cover. Wood Mackenzie projects that data centres will consume as much electricity as 15 million to 18 million households by 2034, driving 60% of the country's total power demand growth.² Hyperscalers have already committed US$28 billion (4 trillion yen) after Tokyo named Oracle, Google and Microsoft as official cloud providers.² The scale of that draw is reshaping how Japan plans generation. Wood Mackenzie estimates data-centre consumption will more than triple from 19 TWh in 2024 to between 57 TWh and 66 TWh by 2034.² Peak load from those facilities could reach 6.6 GW to 7.7 GW over the same period, about 4% of Japan's total peak load and a threefold jump in a decade.² That is the demand picture a European installer is buying into. DEME's entry signals that offshore wind contractors are chasing Asian work as their home market matures, with the EU committed to roughly double its installed wind capacity to 425 gigawatts by 2030.³ Specialised installation vessels and project-management experience are what Japanese builders lack, and a filled pipeline would turn Japan into a genuine market for European offshore wind services. The contract is small in absolute terms, but it opens a door for follow-on work.⁷ But the supply chain behind those turbines is getting more political. Chinese wind manufacturers have been expanding aggressively into Europe, prompting EU officials to flag security concerns over critical infrastructure.³ Japan, a US ally that shares Washington's worry about Chinese industrial overcapacity, may face the same question about whose machines sit on its seabed.³ The allied framework around that decision looks thin. The Quad, the grouping of the United States, Australia, India and Japan, failed to convene its leaders' summit, and India hosted only a foreign-minister meeting on May 26 (2026-05-26).^4,5 Analysts at the Atlantic Council argue the US command structure in the Indo-Pacific, built on a hub-and-spoke model, is poorly suited to Northeast Asia and leaves the subregion without a unified posture.⁶ The price math is unforgiving. Platts JKM LNG front-month, Japan's marginal fuel for power generation, traded around $15.31/MMBtu on Monday (2026-06-22), with Asian gas prices still elevated.¹ Offshore wind has to win firm power-purchase agreements against that fuel while data-centre demand is still ramping.² Watch the award of the turbine supply contract on the project, and the supplier's nationality. If a Chinese manufacturer takes that order, it will confirm that cost and delivery speed, more than alliance politics, decide Japan's energy buildout, even for a close US ally.³