Quaise Energy Draws JERA Backing With $134M Series B for Oregon Superhot Geothermal Plant
Japan's largest power generator joins a $134M round targeting 20-kilometer drilling depths, as the U.S. geothermal sector pushes toward nuclear-scale baseload economics.
JERA Co., Japan's largest power generator, has taken a stake in Houston-based Quaise Energy through its corporate venture arm, JERA Ventures, adding strategic weight to the $134 million Series B that Quaise announced on Tuesday (2026-07-07) to advance its first superhot geothermal plant in central Oregon. The two companies said they would explore deploying the technology in Japan.7,5
Quaise's pitch rests on a drilling method adapted from fusion research: millimeter-wave energy generated by a gyrotron vaporizes rock rather than cutting through it, enabling the company to target depths of up to 20 kilometers and temperatures of 300-500°C. No commercial plant has yet produced power from superhot rock at those conditions.4,5
The Japan connection matters for reasons beyond venture capital signalling. JERA operates one of the world's most LNG-dependent generation fleets, and any credible baseload alternative that proves out in earthquake-prone geology carries direct relevance for the company's fuel procurement. Quaise's drill method is being tested against precisely those conditions. Platts JKM LNG front-month settled at $22.94/MMBtu at Friday's (2026-08-22) close, and long-term supply negotiations for Japanese buyers hinge partly on the durability of gas-fired baseload demand.7,4
Japan's state-backed NEDO has awarded Kyoto Fusioneering ¥500 million to develop a gyrotron — the vacuum electron tube that generates the millimeter waves Quaise uses to bore through rock — accelerating the enabling hardware on both sides of the Pacific simultaneously. Idemitsu, the Japanese refiner, is also considering participating in Quaise's Project Obsidian, a 250 MW geothermal plant in Oregon expected to begin operations in 2030.4
The capital concentration around a single unproven drill approach is notable. Two next-generation geothermal developers posted cost updates in analysis published on Monday (2026-07-13) that undercut new nuclear builds on a per-megawatt basis, according to OilPrice.com. Geothermal plants run at high capacity factors, making them a closer substitute for nuclear baseload than solar or wind. That comparison drew investors who could have placed the same capital in small modular reactor developers.6
The U.S. Department of Energy projects enhanced geothermal could deliver roughly 90 gigawatts of carbon-free capacity by 2050, enough to power at least 65 million homes.3 But the existing U.S. geothermal base puts that target in perspective: the country operates about 4 gigawatts across 99 plants, over half of them in California, as of the third week of July. The sector still faces drilling risk, project finance constraints, and interconnection queues.8
The broader Asian push into deep geothermal runs parallel to Quaise's Oregon work. Baseload Power Taiwan and CPC Corporation, Taiwan signed a memorandum of understanding to accelerate geothermal development, with initial focus on the Tuchang project in Yilan County — geology that sits on the same Ring of Fire as Japan.2 The seismic conditions that make Northeast Asia attractive as a geothermal resource are the same ones that have historically complicated deep drilling there.1
The Oregon project is on an early-2030s timeline, and the distance between a funded Series B and a grid-connected 250 MW plant is exactly where previous enhanced geothermal cycles have stalled. Industry veterans point to a long history of projects that consumed capital without reaching commercial flow rates. Quaise's millimeter-wave approach is differentiated, but differentiation in drilling technology has been claimed before.5,4
The first sustained flow test at superhot temperatures in Oregon will carry more weight than any further fundraising milestone. Idemitsu's participation decision and JERA's deeper commitment are both contingent on what comes out of the ground.4,5