Quaise Energy closes $134M Series B tranche as Japan's JERA backs superhot geothermal push
Superhot geothermal moves from pilot to project finance, with JERA joining Quaise and Idemitsu eyeing Oregon's Project Obsidian.
Houston-based Quaise Energy has raised $134 million to advance its first superhot geothermal power plant in central Oregon, the company announced on Tuesday (2026-07-07), naming the first tranche of its Series B financing.5
The capital injection lands as the US geothermal sector tries to translate drilling breakthroughs into commercial scale. The United States currently operates roughly 4 GW of geothermal capacity across 99 plants, over half in California, and the DOE projects enhanced geothermal could supply about 90 GW of carbon-free power by 2050, enough for at least 65 million homes.8,3
Quaise's technology differs from conventional hydrothermal plants. The company is developing a drilling system using gyrotron-generated millimeter waves to vaporize rock at depths up to 20 km, where temperatures reach 300-500°C, a method that could unlock superhot reservoirs inaccessible to mechanical drill bits.4
The Oregon project, named Project Obsidian, targets 250 MW of capacity with operations expected to begin in 2030. Japanese energy giant JERA has invested through its corporate venture capital arm, JERA Ventures, with both companies exploring deployment of the technology in Japan.7,4
Japan's interest is not academic. The country sits on the seismically active Ring of Fire, giving it substantial volcanic heat resources but also complicating development. Idemitsu is considering participating in Project Obsidian, according to Japan NRG, which would mark a direct Japanese equity stake in the Oregon demonstration.4
The Japanese angle extends beyond Quaise. Kyoto Fusioneering was awarded ¥500 million by NEDO to develop a gyrotron specifically for accelerating deep geothermal drilling, indicating Tokyo is funding parallel domestic efforts rather than relying solely on US technology.4
There is a cost narrative building here that matters for power markets. Two next-generation geothermal developers posted updates in July that move past announcements into measurable drilling progress, and the projects are starting to undercut nuclear on levelized cost, according to Oilprice.com. The Trump administration continues pushing domestic energy additions through funding vehicles and executive orders aimed at grid reliability and AI-driven demand growth.6
Skeptics will note the gap between projection and reality. Geothermal remains a tiny sector, and Quaise's approach requires proving that millimeter-wave drilling can work economically at scale, not just in the lab. The company has yet to deliver a commercial plant, and Project Obsidian's 2030 target leaves room for slippage.3,4
The funding structure also deserves scrutiny. Quaise announced only the first tranche of its Series B, leaving the total round size undisclosed. That partial disclosure suggests the company may still be courting additional strategic investors, with JERA's participation potentially serving as a signal to other Asian utilities.5
Japan's geothermal push comes against a backdrop of broader regional activity. Baseload Power Taiwan and CPC Corporation signed a memorandum of understanding in June to accelerate geothermal development across Taiwan, with initial focus on the Tuchang project in Yilan County. Indonesia and the Philippines, ranking second and third globally in installed geothermal capacity, continue to expand despite financial and community hurdles.2,1
For gas traders, the relevant question is timing. Superhot geothermal's promise of firm, dispatchable baseload power could eventually compete with gas-fired generation in markets like Japan, which relies heavily on LNG imports. But at 250 MW, Project Obsidian is a rounding error in any regional supply picture, and the 2030 startup date means no near-term displacement.4
The more immediate signal is in Japan's procurement behavior. JERA's venture investment and Idemitsu's potential equity stake suggest Japanese utilities are hedging their LNG exposure by taking early positions in next-generation geothermal. The yen's weakness at 159.28 per dollar as of Monday (2026-08-10) makes imported LNG costlier, adding urgency to domestic power development.7,4 [LIVE PRICES]
What bears watching is whether Quaise closes the remaining Series B tranches and whether Idemitsu converts its consideration into a firm commitment. The DOE's 90 GW by 2050 projection assumes sustained capital inflows; a partial round at this stage is progress, but not proof, and Japan's NEDO-backed gyrotron work could either complement Quaise or produce a competing approach.5,34