Best Sustainability Tech Companies in Japan
The 127 best Sustainability Tech companies in Japan in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: JOLED.
Ranking the best Sustainability Tech companies in Japan by disclosed equity funding, this directory tracks 127 ventures that have collectively pulled in $2.2B, with zero unicorns yet and a lot of runway still ahead. The global market tells you why the activity level makes sense: valued at roughly $16.2B in 2022, it's forecast to hit $122.7B by 2032 at a 23.8% CAGR, driven by smart grid adoption, low-carbon economy transitions, and a broad push into green technology. Gojo leads our list at $325M raised, followed by PowerX at $91M and Kyulux at $86M. And the sector's hot themes right now, EV battery technology, next-gen EV platforms, and drive system innovations, map almost perfectly onto where Japan's industrial capital wants to go.
What I find telling is how concentrated the investor base remains. Mitsubishi UFJ Capital, SMBC Venture Capital, JAFCO Group, DG Ventures, and Global Brain keep appearing at the cap table, which signals institutional conviction rather than speculative noise. The regulatory gap around green technology is a real friction point, and it's slowing some capital deployment. But momentum is building globally too: eco-friendly innovation spotlights and seed rounds closing fast in adjacent markets suggest the broader category is nowhere near peak interest. Coverage here is rising quarter over quarter.
- MarketsandMarkets
Our analysis of 293 Sustainability Tech companies
$38.4b in tracked funding; 83% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Sustainability Tech companies in Japan
| # | Company | Disclosed funding | Last round | Founder | Employees | Tech stack | Web popularity | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | JOLED Developer of OLED-based display panels including printed OLED, oxide TFT displays, and flexible displays | $1.4B | 72 mo ago | Yoshimasa Ishibashi CEO | 590 | — | — | 1,551 patents Flexible OLED display panels with barrier layers and foldable/rollable form factors | — |
| 2 | Gojo Microcredit for individuals and businesses | $325M | 21 mo ago | Sanjay Gandhi Co-Founder | 8,500 | WordPressMySQLPHP+30 | Top 5M | 3 patents Water decontamination, biofuel synthesis, and catalytic processing technologies | 1 partnership |
| 3 | PowerX Manufacturer of stationary battery storage systems and related energy services | $91M | 15 mo ago | Masahiro Ito Founder & CEO | 47 | Cart FunctionalityContentfulTurbopack+23 | Top 5M | 41 patents Electric power generation and transmission systems for ships and land vehicles | 1 expansion |
| 4 | Kyulux Provider of OLED lighting systems | $86M | 1 mo ago | Akira Minakuchi Co-Founder & CFO | 5 | WordPressApple iCloud MailGoogle Workspace+23 | Top 10M | 520 patents Organic light‑emitting diodes and related emissive materials for display and lighting | — |
| 5 | QD Laser Developer of nanotech-based quantum dots for energy generation | $50M | 86 mo ago | — | 58 | WordPressMySQLPHP+11 | Top 5M | 196 patents High‑resolution laser projection and ophthalmic imaging systems using semiconductor lasers | — |
| 6 | Ene Coat Technologies Manufacturer and seller of perovskite solar cell | $34M | 15 mo ago | Takaya Kato Co-CEO & Director | 24 | WordPressMySQLPHP+8 | Top 5M | — | — |
| 7 | Aillis AI enabled device for influenza diagnosis | $33M | 18 mo ago | Hiroaki Kato Co-Founder & CSO | 31 | Apple iCloud MailGoogle WorkspaceNode.js+22 | Top 10M | 62 patents Medical imaging hardware and AI-driven image processing, plus antiviral pharmaceutical formulations. | — |
| 8 | Jeplan Plastic processing technology developer | $31M | 45 mo ago | Masaki Takao Co-Founder & CEO | 15 | WordPressMySQLPHP+13 | Top 5M | 91 patents Advanced PET chemical recycling and high-purity terephthalate monomer production processes | — |
| 9 | I-Grid Provider of GX solutions, energy trading, and renewable energy platforms | $21M | 34 mo ago | Tomokazu Akita CEO | 100 | WordPressMySQLPHP+21 | Top 1M | 12 patents Quantum algorithm design and optimization for hybrid quantum‑classical machine learning | — |
| 10 | UMN Pharma Developing vaccines for influenza | $20M | 231 mo ago | — | 42 | NginxGoogle Font APISakura Internet+3 | Top 50M | — | — |
| 11 | ZeroBoard Provides GHG emissions from corporate activities and the supply chains | $18M | 39 mo ago | Tokeji Michitaka CEO | — | Apple iCloud MailGoogle WorkspaceFroala Editor+28 | Top 5M | 6 patents Business transaction and e‑commerce data processing platforms and methods | 1 launch |
| 12 | Panair Provider of cloud-based solutions for power distribution companies | $18M | 95 mo ago | Tatsuhiko Nagoshi Co-Founder & CEO | — | — | — | — | — |
| 13 | Skydisc Provider of digital transformation solution for manufacturing industries | $15M | 36 mo ago | — | 10 | WordPressMySQLPHP+23 | Top 10M | — | — |
| 14 | Digital Grid Provider of transmission and distribution management solutions | $12M | 78 mo ago | Rikiya Abe CEO | 47 | Apple iCloud MailGoogle WorkspaceNode.js+19 | Top 5M | — | — |
| 15 | Sensyn Robotics Provider of drone hub, related control software, and inspection solutions | $11M | 71 mo ago | Takuya Kitamura CEO | 121 | HubSpot CMS HubApple iCloud MailGoogle Workspace+15 | Top 10M | 35 patents Patents concentrated in computing, sensing & instrumentation | — |
| 16 | Dioseve Inc Developer of iPS cell-derived egg production technology for infertility treatment | $10M | 23 mo ago | Kaz Kishida CEO | 6 | WordPress Block EditorWordPressPlesk+16 | Top 10M | 10 patents In vitro generation and maturation of human oocytes for reproductive biotechnology | — |
| 17 | Miraikikai Developer of robots and laser sensors for various industrial applications | $6M | 93 mo ago | Tohru Miyake Founder & CEO | 24 | WordPressMySQLPHP+21 | Top 10M | 39 patents Autonomous robots for cleaning and maintaining solar panel installations. | — |
| 18 | SPACECOOL Manufacturer of optical film | $6M | 17 mo ago | — | 20 | WordPressMySQLPHP+22 | Top 5M | — | — |
| 19 | U-MAP Technology solutions provider for energy insulation | $5M | 42 mo ago | Kenji Nishitani CEO | 5 | — | — | 18 patents High‑thermal‑conductivity ceramic/resin composites for power‑module heat management | — |
| 20 | Girasol Energy Provider of AI and cloud-based monitoring solutions for photovoltaic plants | $5M | 13 mo ago | Li Min CEO | 8 | STUDIOFirebaseNode.js+11 | Top 50M | — | — |
| 21 | EF Polymer Manufacturer of organic super-absorbent hydrogel for sustainable agriculture | $4M | 8 mo ago | Narayan Gurjar Co-Founder & CEO | 22 22 → 51 (+132%) | WordPressMySQLPHP+19 | Top 10M | — | 1 job opening · 1 award |
| 22 | JCCL Provider of carbon dioxide recovery and recycling solutions | $4M | 20 mo ago | Toshiyuki Umehara CEO | — | — | — | 11 patents Advanced gas recovery, separation, and CO₂ capture using composite membrane technologies | — |
| 23 | Radiation Watch Developer of smart sensors for radiations solutions | $4M | — | Akira Ishigaki Founder | — | BloggerJavaPython+5 | Top 50M | — | — |
| 24 | Tensor Energy AI-driven platform offering portfolio management solutions for renewable energy operators | $4M | 2 mo ago | Vincent Filter Founder | 9 | SentryApple iCloud MailMicrosoft 365+9 | Top 10M | — | — |
| 25 | aiESG Provider of ESG analysis services with a focus on sustainability | $3M | 13 mo ago | Daikichi Seki Co-Founder & CEO | — | WordPressMySQLPHP+17 | Top 5M | — | 2 launchs |
| 26 | Emulsion Flow Technologies Rare metal recycling solutions | $3M | 27 mo ago | Yuji Suzuki Founder & CEO | — | WordPressMySQLPHP+9 | Top 10M | 8 patents Liquid-liquid extraction and phase‑mixing equipment for chemical processing | — |
| 27 | StapleBio Developer of nucleic acid drugs for the treatment of infectious diseases | $3M | 25 mo ago | Yousuke Katsuda Co-Founder | — | — | — | — | — |
| 28 | I & C Cruise Offers customer acquisition services and among other businesses | $2M | 135 mo ago | Ryosuke Imai CEO & President | 80 | OpenSSLApache HTTP ServerAmazon Web Services+7 | Top 50M | — | — |
| 29 | Carbon EX Provider of carbon credit and emissions trading platform | $2M | 15 mo ago | Shunsuke Takeda Co-CEO | — | — | — | 23 patents Carbon fiber production processes and carbon-based materials for lithium‑ion battery electrodes | — |
| 30 | Pirika Waste collection app provider | $2M | 36 mo ago | Fujio Kojima CEO | — | — | — | — | — |
| 31 | EXORPHIA Developer of exosome-based therapeutics for various diseases | $2M | 49 mo ago | Koji Kuchiishi Founder & CEO | 4 | WordPressMySQLPHP+7 | Top 50M | 9 patents Exosome-based drug delivery and DNA vaccine platforms for targeted therapeutics | — |
| 32 | Flamingo (Educational Software) Operator of a language learning platform intended to teach different languages. | $2M | 102 mo ago | — | 8 | STUDIOFirebaseNode.js+16 | Top 10M | — | — |
| 33 | Nanotis Microfluidic chip based diagnostic test for influenza | $1M | 47 mo ago | Lisa Sakashita Co-Founder & CEO | 10 | — | — | 7 patents Rapid viral and biomarker detection assays for clinical diagnostics | — |
| 34 | RECEPTIONIST SaaS-driven visitor management and reception system for organizations | $1M | 99 mo ago | Mariko Hashimoto CEO | — | WordPressMySQLPHP+27 | Top 5M | — | 1 job opening · 1 partnership |
| 35 | Immunorock Developer of immunotherapies for the treatment of cancer and infectious diseases | $1M | 6 mo ago | Toshiro Shirakawa CEO | — | — | — | — | — |
| 36 | LiSTie Recovery of lithium resources from seawater and recycled lithium-ion batteries | $975K | 14 mo ago | Tsuyoshi Hoshino CEO | — | — | — | — | — |
| 37 | Habitat Offers visitor management solutions | $881K | 53 mo ago | Kawasaki Wataru Co-Founder | — | — | — | — | — |
| 38 | Melody International Provider of device and cloud-based app for fetal monitoring | $743K | 30 mo ago | Keiji Ninomiya Co-Founder | — | — | — | — | — |
| 39 | Sunda Technology Global Provider of sustainable water management solutions for communities in need | $682K | 14 mo ago | Aya Tsuboi Co-Founder & CEO | — | — | — | — | — |
| 40 | Sustaina Water Production of freshwater from atmospheric moisture | $204K | 30 mo ago | Katsuichiro Matsuda CEO | — | — | — | — | — |
Top 12 Sustainability Tech companies in Japan
#1
Series B · Fukuoka, Fukuoka · founded 2015 · 5 employees$85.7Mraised▾
Provider of OLED lighting systems. It offers TADF OLED (Thermally Activated Delayed Fluorescence Organic Light Emitting Diode) technology for display and lighting. The company offers hyper fluorescence OLEDs, which combine TADF and fluorescence emitters to enable highly efficient emission.
- May 2026Series B—
- Sep 2023Series B$1.4M
- Feb 2021Series B$34.3M
- May 2019Series B$31.8M
#2
Series F · Shibuya, Tokyo · founded 2014 · 8500 employees$324.6Mraised▾
Microcredit for individuals and businesses
- Sep 2024Series F$122M
- Sep 2024Conventional Debt$111M
- Aug 2023Series E$30.8M
- Feb 2023Series E$23M
#3
Series A · Chiyoda City, Tokyo · founded 2021 · 9 employees$3.6Mraised▾
AI-driven platform offering portfolio management solutions for renewable energy operators. It allows users to manage multiple distributed power plants, forecast solar & wind power generation, coordinate power trading, and more.
- Apr 2026Series A$6M
- Mar 2024Seed$3M
- Mar 2022Seed$605.6K
#4
Public · Minato, Tokyo · founded 2021 · 47 employees$91.1Mraised▾
Manufacturer of stationary battery storage systems and related energy services. The company provides large-scale stationary battery solutions and related services. These offerings include battery storage systems, energy services, and charging solutions. The company is also involved in energy-related projects. It develops and deploys grid-connected energy storage solutions for power companies, real estate developers, and logistics firms.
- Mar 2025Series C$21.4M
- Sep 2024Series C$17.3M
- Jan 2024Conventional Debt$64.1M
- Jul 2023Series B$13.3M
#5
Series B · Okinawa, Okinawa · founded 2018 · 22 employees$4.5Mraised▾
Manufacturer of organic super-absorbent hydrogel for sustainable agriculture. This hydrogel, created from eco-waste, retains significant amounts of water, nourishes soil with micronutrients, and improves water retention capacity, boosting crop growth. The product is biodegradable and enhances fertilizer application, reducing water and fertilizer usage. It offers a sustainable solution for farmers seeking improved yields and resource conservation.
- Sep 2025Series B$17.8M
- Apr 2025Series B$6.6M
- May 2023Series A$4.1M
- Apr 2021Seed$359.7K
#6
Series C · Kyoto, Kyoto · founded 2018 · 24 employees$34.2Mraised▾
Ene Court Technologies is engaged in the development of thin-film perovskite solar cell (PSC) and related materials. The product is claimed to have efficiency in generating power under any conditions like high illuminance, without intermediate light intensity and low light intensity. The product is in the development stage.
- Feb 2025Series C—
- Jul 2024Series C$34.2M
- May 2022Series B—
- Apr 2022Seed—
#7
Series D · Chuo, Tokyo · founded 2017 · 31 employees$33Mraised▾
Aillis has developed a medical device for influenza virus detection using AI technology. The device is used to identify influenza follicles with features such as surface color, gloss, size and shapes that are present on the posterior pharyngeal wall of infected patients. The device uses the pharyngeal images from the patient and uses machine learning and AI technology to analyses the features of follicles and diagnose influenza.
- Nov 2024Series D$3.3M
- Mar 2024Series D$33M
- Jan 2024Series D—
#8
Seed · Kobe, Hyogo · founded 2021$1Mraised▾
Developer of immunotherapies for the treatment of cancer and infectious diseases. The company is focused on developing a cancer immunotherapy drug using an innovative oral vaccine platform technology which include B440 WT1 oral cancer vaccine and the BCOV332 oral Covid vaccine.
- Dec 2025Seed$315.4K
- Jul 2025Seed$1.2M
- Apr 2024Seed$292.5K
- Jul 2023Seed$747.8K
#9
Series B · Bunkyo, Tokyo · founded 2017 · 8 employees$4.6Mraised▾
Provider of AI and cloud-based monitoring solutions for photovoltaic plants. It provides a PPLC sensor that collects data from panels and a PPLC gateway that communicates with the PPLC cloud. The PPLC cloud automatically located abnormal behavior using an AI engine.
- Apr 2025Series B$9M
- Mar 2024Series B—
- Aug 2021Series A$4.6M
#10
Series A · Hakata, Fukuoka-ken · founded 2022$3.3Mraised▾
Provider of ESG analysis services with a focus on sustainability. It provides ESG analysis for each product and service, including human rights-related indicators such as forced labor and child labor. It evaluates sustainability analysis using three layers, mapping, impact evaluation, and scoring.
- Apr 2025Series A—
- Dec 2024Conventional Debt—
- Dec 2024Series A$3.3M
#11
Late Stage · Tokyo, Tokyo · founded 2015 · 590 employees$1.4Braised▾
Developer of OLED-based display panels including printed OLED, oxide TFT displays, and flexible displays. Offerings include display panels developed using technologies such as printed OLED, oxide TFT technology (TAOS), and flexible displays. The displays are claimed to have multiple features such as they are foldable, unbreakable, see-through, flexible, transparent, energy efficient, have better image quality and self-luminance, etc. Target markets include smartphones, wearable devices, medical equipment monitors, laptops, computers, etc.
- Jun 2020PE$280.6M
- Apr 2019PE$228.2M
- Aug 2018PE$425.6M
- Dec 2017PE$441.2M
#12
Series A · Minato City, Tokyo · founded 2021 · 20 employees$5.7Mraised▾
Manufacturer of optical film
- Jan 2025Series A$5.7M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Sustainability Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Climate Adaptation is moving in Japan
A read on the academic research around Climate Adaptation — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 274 Japan-affiliated papers.
- Kyoto University27
- The University of Tokyo26
- United Nations University18
- Japan External Trade Organization18
- Tohoku University14
- Flood myth2→25
- Flooding (psychology)1→6
- Flood risk assessment1→5
- Climate change7→24
- Flood myth16→32
- Agriculture2→7
- Resilience (materials science)2→7
- Psychological resilience3→7
- Climate change2→56
- Flood myth5→25
- Flooding (psychology)3→16
- Resilience (materials science)1→11
- Adaptation (eye)1→6
Where climate adaptation is researched across Japan
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.