Japan has long been recognized as a global leader in precision engineering and advanced manufacturing. Yet in the race to decarbonize, its climate tech startup ecosystem is only beginning to accelerate. While government support is growing and university spinouts are gaining traction, Japanese climate innovators often face a key barrier: access to international markets, capital, and deep networks to support their growth.

At the same time, the U.S.—and California in particular—remains a global hub for climate innovation. With its dense investor networks, policy leadership, and cutting-edge R&D institutions, California offers fertile ground for scaling climate technologies that can help the world meet net-zero goals.

To unlock this potential, New Energy Nexus, Third Derivative, and Japan Energy Fund have partnered with JETRO to launch the Global Startup Acceleration Program (GSAP). This initiative is more than an exchange—it’s a bridge between two ecosystems with complementary strengths. By bringing Japan’s deep tech ingenuity into conversation with California’s fast-moving entrepreneurial culture, we aim to accelerate climate solutions that the whole world needs.

Below, meet 10 startups selected for the inaugural GSAP cohort. Each brings a unique approach to decarbonization—from fusion to algae, electronics to rare metal recycling. Together, they represent a new wave of Japanese climate innovation ready to go global.

Meet the Startups

The inaugural GSAP cohort of startups.

Planet Savers
Planet Savers is Japan’s first Direct Air Capture (DAC) startup, spun out of the University of Tokyo. They’re developing a scalable CO₂ adsorbent-based DACCU system, aiming to lower capture costs to around $100–400 per ton. The team recently secured a significant NEDO grant to pilot their high-efficiency DAC technology, supporting their goal to “halt climate change and leave a beautiful Earth for the next generation.”

miibio
miibio develops light-switchable protein technology that allows precise optical control of biological processes. Based in Tokyo and rooted in synthetic biology research from the University of Tokyo, the company is commercializing this technology for use in research reagents and biomanufacturing, offering greater control over protein behavior.

Aqua Theon
Aqua Theon creates seaweed-based biomaterials for use in food, packaging, and medical products. By working with marine biomass, the company is developing renewable, circular alternatives that reduce reliance on conventional plastics.

Helical Fusion
Helical Fusion is working on fusion energy systems with new reactor designs aimed at delivering safe, scalable, and low-carbon power. The company’s approach focuses on making fusion a practical part of the future energy mix.

Rhinoflux
Rhinoflux develops bioenergy systems that capture carbon while generating power. By extracting CO₂ from biomass, their technology enables simultaneous energy production and carbon removal—useful for industries seeking low-emission, resilient energy solutions.

Atierra
Atierra uses microalgae bioreactors to remove atmospheric CO₂. Their systems convert carbon into algal biomass, offering a biotech-driven, nature-based approach to climate mitigation at scale.

E‑Thermo / Gentek
E‑Thermo Gentek captures industrial waste heat and converts it into electricity using thermoelectric technology. Their systems help industries recover energy that would otherwise be lost, improving efficiency and reducing emissions.

Emulsion Flow Technologies
Emulsion Flow Technologies provides rare metal recycling for batteries and electronics. Their proprietary emulsion process enables the recovery of valuable materials in a more sustainable way, contributing to circularity in fast-growing supply chains like EVs.

Sun Metalon
Sun Metalon integrates CO₂ reduction into metal recycling processes, with the goal of lowering emissions in heavy industry. Their approach combines carbon capture and resource reuse to support more sustainable industrial practices.

Elephantech
Elephantech manufactures printed circuit boards (PCBs) using a metal inkjet printing process. Their additive method cuts down on material waste and lowers environmental impact, offering a more efficient path for electronics production.

About the Program: JETRO Global Startup Acceleration Program (GSAP)

Co-hosted by New Energy Nexus, Third Derivative, and Japan Energy Fund, JETRO’s GSAP program supports 10 Japanese climate tech startups through a multi-phase program:

June (Tokyo Kick-off): Orientation, mentorship, and peer learning to shape business models and go-to-market strategies.

July–September (Virtual Acceleration): Group sessions and one-on-one mentoring with investors and industry leaders to refine pitches and partnerships.

October (US Immersion Week): In-person programming in San Jose, including curated business meetings, investor matchmaking, and participation in the VERGE Climate Tech Conference.

Nov 2025–Early 2026 (Follow-up Support): Ongoing mentoring and strategic guidance to deepen market entry, secure partnerships, and scale growth.

By building long-term connections between Japanese founders and global innovation ecosystems, the program aims to catalyze real, scalable climate impact.

Stay tuned as we follow these founders on their journey—from Tokyo labs to California boardrooms—and help usher in the next generation of global climate solutions.

A Vietnamese farmer cuts rice and harvests rice in the Mekong Delta.

Climate change is having a huge impact in Vietnam’s Mekong Delta. The region is sinking 1.1 centimeters every year, and farmers are struggling with inconsistent weather cycles.

In response, its agricultural sector is embracing climate adaptation, powered by brilliant women entrepreneurs whose products are helping the region build resilience.

Through the Deltaccelerate program, funded by the Australian Government and managed by New Energy Nexus, six women entrepreneurs with climate-adaptive products received up to VND 1 billion (over US$39,000) to scale their businesses and strengthen their sustainable practices. These entrepreneurs were selected out of 14 competitive participants, all of whom underwent tailored training and gained networking opportunities.

This program follows a positive trend for diversity in the country’s private sector. Women now own over 20 percent of small- and medium-sized enterprises (SMEs) in the country. As they rise in numbers, so does their role in shaping the future of sustainable business in Vietnam.

The six women entrepreneurs receiving funding from the Deltaccelerate program.

Whether they’re using coffee to make mugs, or cat houses from water hyacinth, here are the women-led businesses at the forefront of climate innovation in the Mekong Delta:

Mekong Coconut Oil Company Limited (Cocovie)

Founded by Hoang Thanh Thuy, the company produces quality cosmetic and food products made from coconut oil in the Ben Tre province. They have been utilizing and preserving over 10,000 hectares of coconut trees, estimated to have absorbed 75,000 tons of CO2.

Cau Ke Macapuno Coconut Processing Co., Ltd (VICOSAP)

Lam Ngoc Tu’s business uses macapuno coconuts to produce confectionery, baking ingredients and drinks. Cultivated by the Khmer community of Tra Vinh province, macapuno coconuts are known for their high saline tolerance—making them an ideal climate-adaptive crop.

Palmania JSC

Co-founded by Chau Ngoc Diu, the company produces Palmania, an organic sugar substitute made of sweet nectar from palmyra trees in An Giang province. The business provides jobs to indigenous farmers and taps palmyra trees in a way that does not shorten the trees’ 100-year lifespan.

Ben Tre Village in the Mekong Delta.

AirXCarbon/Veritas Vietnam JSC

Represented by Chief Strategic Officer Tran Thanh Thao, AirXCarbon turns materials such as coffee grounds, rice, and coconut husks into bioplastics, used to make zero-carbon products ranging from mugs to alternative packaging.

Dam Doi Sesarmid Cooperative

Tran Thi Xa’s business produces a wide range of sustainable products made from sesarmids and shrimps caught in the Ca Mau province.

Ecoka JSC

Led by Quang Chan Chan, this company manufactures and distributes handicrafts made entirely from natural materials in the Ha Giang province—including water hyacinth, bulrush, rattan, bamboo, and macrame. Their products include bags, coasters, and even cat houses.

About Deltaccelerate

Deltaccelerate is made possible by a unique partnership between the Australian Government and New Energy Nexus through the Business Partnerships Platform (BPP) Climate Adaptation Partnerships in the Mekong Delta, announced in November 2023.

Deltaccelerate is a business accelerator funded by the Australian Government providing direct support, tailored training, and networking opportunities for enterprises that work in the Mekong Delta’s agricultural sector, which are led by or significantly benefit women and contribute to the sector’s resilience to climate adaptation.

The Partnerships are part of the Australian Government’s AU$94.5 million investments for climate change adaptation in the Mekong Delta.

Ralph Ebora, NEXPH Program Manager for Startup Development, discusses the topic of transitioning to a clean energy economy.

The challenge of transitioning to clean energy

The transition to a 100% clean energy system is a complex undertaking. Energy systems are deeply foundational, influencing every aspect of human society. Transforming infrastructures built over centuries requires collaboration among multiple stakeholders, resources, innovative approaches, and precise timing to succeed.

Key issues such as transforming transport systems, increasing renewable energy adoption, and enabling energy consumers to use energy more efficiently are regularly discussed in conferences and meetings. While some ideas inspire change in communities, many remain just discussions due to limited resources and a lack of clarity on how to proceed.

Participants of Ready, Spark, Charge 2024: Hacking the Future of Energy

What are hackathons for?

Hackathons are events that bring together individuals from diverse sectors to brainstorm and develop innovative solutions to pressing challenges. They provide an impactful platform for turning discussions into action.

The concept of a hackathon combines “hack” (exploratory coding) with “marathon,” emphasizing intensive teamwork and rapid prototyping. While originally centered on software, hackathons have evolved to encompass broader challenges, including those in energy and climate innovation.

Participants of Ready, Spark, Charge 2023

Climate and energy hackathons in the Philippines

Over the past four years, New Energy Nexus Philippines has hosted an annual hackathon to gather energy and climate innovators. These events provide participants with feedback from industry practitioners, improving the feasibility and marketability of their ideas, as well as resources to develop their solutions further.

Continuing this tradition, Ready, Spark, Charge 2024: Hacking the Future of Energy assembled over 30 participants from across the Philippines for 2.5 days of collaboration, problem-solving, and innovation. Teams left not just with ideas but with actionable solutions ready for testing and implementation.

Bradley Cua, resource speaker, engages participants during the gallery walk session, discussing the challenge statement on energy efficiency in industries and offering additional insights.

The hackathon began with participants arriving with eager minds and a shared commitment to solve some of the country’s most pressing energy challenges. The first two days saw participants discuss key energy topics in the Philippines, such as energy efficiency, sustainable transport, and renewable energy adoption.

Drawing from the discussions, they then teamed up to brainstorm viable energy solutions. Experienced business and tech mentors helped narrow down their concepts based on feasibility, marketability, and potential impact.

Joshua Bascos of Team WATTsUp presenting their startup idea during the Day 2 mentoring session.

On the final day, the teams had a few minutes to pitch their solutions to a panel of judges, who probed their ideas, which ranged from eco-friendly briquettes to AI-powered energy assistants. In the end, four standout teams were recognized: Greenewables, SmartER, SolScribe, and WATTsUp.

The hackathon succeeded by generating innovative solutions through a collective effort from its participants. More importantly, it built strong bonds among the country’s future energy changemakers.

Engr. Erickson Tacda and Dr. Marilyn Calub of Greenwables receive the RSC 2024 Grand Champion and Best Pitcher Award.

The impact of collective innovation

The hackathon demonstrated the potential of collaborative innovation in addressing decades-old energy challenges. By bringing together passionate individuals and providing them with resources and guidance, New Energy Nexus Philippines fostered a space where transformative ideas could take root.

The real challenge lies ahead—ensuring that these promising innovations continue to develop and deliver the impact they envision. As these solutions progress, they serve as a beacon of hope for a cleaner, more sustainable energy future in the Philippines and beyond.

Participants of Ready, Spark, Charge 2024: Hacking the Future of Energy

Brenda Valerio is the country director of New Energy Nexus Philippines.

Energy storage is critical to help us unlock the full potential of renewable energy. Without energy storage systems, we would not be able to affordably reach net-zero greenhouse gas emissions. It is a key step to enable low carbon systems that will help fight climate change and make affordable energy more accessible to everyone.

New York is increasingly becoming known as one of the global energy storage hubs in the world, thanks to Biden’s Build Back Better Plan that will invest billions into climate and clean energy among other select industries. Our New York Program, The Clean Fight that was recently selected to manage US$10M Empire Technology Prize to advance building decarbonization brings you ten growth-stage companies in the latest cohort to accelerate New York’s position as a U.S. hub for energy storage.

The program will focus on battery and energy storage solutions, development and manufacturing. The goal is to help these companies to successfully and rapidly scale sales and manufacturing in New York. To facilitate this, each of the selected companies is eligible for:

• a range of tailored benefits, valued at up to $100,000 per company to support capacity building, deployments or manufacturing capabilities in New York;
• hands-on matchmaking with industry leading customer and capital partners;
  bespoke support services; and
• expert insight into navigating the New York State market.

Based in Europe, Australia and North America, and working across the value chain, listed below are the ten transformative companies. We’re excited to see how they work together and with our partners to aggressively advance the clean energy transition, while boosting economic opportunity and job creation for all.

Cells & Packs

Cadenza Innovation, based in Connecticut, makes novel battery packs designed to address one of the greatest concerns with Lithium-Ion batteries – fire prevention, making them safer, more reliable and affordable.

NY’s Electrovaya makes batteries with an exceptional combination of high energy density, safety and longevity, making them particularly well suited to heavy use vehicles such as electric trucks and buses.

Energy Storage Systems

Toronto’s e-Zinc makes battery cells that store electrical energy within zinc metal, storing hundreds of hours of energy at a significantly lower cost. This can dramatically improve the value proposition of intermittent electricity such as wind and solar.

Based in Australia, Glaciem Cooling’s heat pump technology provides heating and cooling to commercial and industrial customers, combined with a phase change thermal battery to provide integrated energy storage, for improved efficiency and cost.

Buffalo, NY based Viridi designs and builds distributed energy storage systems that are affordable, scalable and safe enough for use in occupied buildings, providing on-demand power for industrial, medical, commercial and residential applications.

Mobile & Mobility Systems

Sweden’s Elonroad produces dynamic EV charging solutions embedded into roads, allowing for charging on the go. This also enables battery sizes to be reduced by up to 80%.

Portable Electric, based in Vancouver, makes portable, battery-based generators to replace gas and diesel generators, providing clean, silent power on demand. Their systems are used on job sites, for emergency EV and fleet charging, and as backup power.

Distributed Energy Resources

Canadian company eCAMION delivers a Distributed Energy Resource solution for customers looking to manage batteries, solar installations, and EV chargers to maximize efficiency while minimizing cost and strain to the grid.

OhmConnect, based in California, builds Virtual Power Plants by connecting to residential batteries, EVs and smart thermostats, reacting in real time to the needs of the grid, reducing reliance on high-pollution peaker plants and lowering GHG emissions.

Austin, Texas based Yotta Energy produces distributed energy products, including EV chargers and the first solar battery that integrates behind rooftop solar panels. The integrated battery significantly reduces installation costs, along with its plug-and-play design that means if you can install a solar module, you can install their battery.

Learn more about our New York program, The Clean Fight designed to help the world’s best growth-stage startups significantly scale their business in New York State, while boosting economic opportunity and job creation for all. The Clean Fight is also a member of the winning New Energy New York coalition, who were awarded $113M as part of the Biden Administration’s Build Back Better Regional Challenge.