Best Sustainability Tech Companies in Tokyo, Japan
The 61 best Sustainability Tech companies in Tokyo, Japan in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: JOLED.
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 Tokyo
| # | Company | Disclosed funding | Last round | Stage | Employees | Founder | Tech stack | 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 | Late Stage | 590 | Yoshimasa Ishibashi CEO | — | 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 | Series F | 8,500 | Sanjay Gandhi Co-Founder | WordPressMySQLPHP+30 | 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 | 16 mo ago | Public | 47 | Masahiro Ito Founder & CEO | Cart FunctionalityContentfulTurbopack+23 | 41 patents Electric power generation and transmission systems for ships and land vehicles | 1 expansion |
| 4 | Aillis AI enabled device for influenza diagnosis | $33M | 19 mo ago | Series D | 31 | Hiroaki Kato Co-Founder & CSO | Apple iCloud MailGoogle WorkspaceNode.js+22 | 62 patents Medical imaging hardware and AI-driven image processing, plus antiviral pharmaceutical formulations. | — |
| 5 | Jeplan Plastic processing technology developer | $31M | 46 mo ago | Series D | 15 | Masaki Takao Co-Founder & CEO | WordPressMySQLPHP+13 | 91 patents Advanced PET chemical recycling and high-purity terephthalate monomer production processes | — |
| 6 | I-Grid Provider of GX solutions, energy trading, and renewable energy platforms | $21M | 35 mo ago | Series B | 100 | Tomokazu Akita CEO | WordPressMySQLPHP+21 | 12 patents Quantum algorithm design and optimization for hybrid quantum‑classical machine learning | — |
| 7 | ZeroBoard Provides GHG emissions from corporate activities and the supply chains | $18M | 40 mo ago | Series A | — | Tokeji Michitaka CEO | Apple iCloud MailGoogle WorkspaceFroala Editor+28 | 6 patents Business transaction and e‑commerce data processing platforms and methods | 1 launch |
| 8 | Panair Provider of cloud-based solutions for power distribution companies | $18M | 96 mo ago | Deadpooled | — | Tatsuhiko Nagoshi Co-Founder & CEO | — | — | — |
| 9 | Digital Grid Provider of transmission and distribution management solutions | $12M | 79 mo ago | Public | 47 | Rikiya Abe CEO | Apple iCloud MailGoogle WorkspaceNode.js+19 | — | — |
| 10 | Sensyn Robotics Provider of drone hub, related control software, and inspection solutions | $11M | 72 mo ago | Series A | 121 | Takuya Kitamura CEO | HubSpot CMS HubApple iCloud MailGoogle Workspace+15 | 35 patents Patents concentrated in computing, sensing & instrumentation | — |
| 11 | Dioseve Inc Developer of iPS cell-derived egg production technology for infertility treatment | $10M | 24 mo ago | Series A | 6 | Kaz Kishida CEO | WordPress Block EditorWordPressPlesk+16 | 10 patents In vitro generation and maturation of human oocytes for reproductive biotechnology | — |
| 12 | SPACECOOL Manufacturer of optical film | $6M | 17 mo ago | Series A | 20 | — | WordPressMySQLPHP+22 | — | — |
| 13 | Girasol Energy Provider of AI and cloud-based monitoring solutions for photovoltaic plants | $5M | 14 mo ago | Series B | 8 | Li Min CEO | STUDIOFirebaseNode.js+11 | — | — |
| 14 | Tensor Energy AI-driven platform offering portfolio management solutions for renewable energy operators | $4M | 3 mo ago | Series A | 9 | Vincent Filter Founder | SentryApple iCloud MailMicrosoft 365+9 | — | — |
| 15 | I & C Cruise Offers customer acquisition services and among other businesses | $2M | 136 mo ago | Series A | 80 | Ryosuke Imai CEO & President | OpenSSLApache HTTP ServerAmazon Web Services+7 | — | — |
| 16 | Carbon EX Provider of carbon credit and emissions trading platform | $2M | 15 mo ago | Seed | — | Shunsuke Takeda Co-CEO | — | 23 patents Carbon fiber production processes and carbon-based materials for lithium‑ion battery electrodes | — |
| 17 | Pirika Waste collection app provider | $2M | 37 mo ago | Series A | — | Fujio Kojima CEO | — | — | — |
| 18 | Nanotis Microfluidic chip based diagnostic test for influenza | $1M | 47 mo ago | Series A | 10 | Lisa Sakashita Co-Founder & CEO | — | 7 patents Rapid viral and biomarker detection assays for clinical diagnostics | — |
| 19 | RECEPTIONIST SaaS-driven visitor management and reception system for organizations | $1M | 99 mo ago | Series A | — | Mariko Hashimoto CEO | WordPressMySQLPHP+27 | — | 1 job opening · 1 partnership |
| 20 | Habitat Offers visitor management solutions | $881K | 54 mo ago | Seed | — | Kawasaki Wataru Co-Founder | — | — | — |
| 21 | Sustaina Water Production of freshwater from atmospheric moisture | $204K | 31 mo ago | Seed | — | Katsuichiro Matsuda CEO | — | — | — |
Top 12 Sustainability Tech companies in Tokyo
#1
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
#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
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
#4
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—
#5
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
#6
Series A · Minato City, Tokyo · founded 2021 · 20 employees$5.7Mraised▾
Manufacturer of optical film
- Jan 2025Series A$5.7M
#7
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
#8
Seed · Minato, Tokyo · founded 2023$2Mraised▾
Provider of carbon credit and emissions trading platform. It facilitates the buying and selling of carbon credits among developers, sellers, traders, and buyers. Its platform enables businesses to reduce their environmental impact and contribute to a sustainable future.
- Mar 2025Seed$2M
#9
Series A · Bunkyo, Tokyo · founded 2021 · 6 employees$10Mraised▾
Developer of iPS cell-derived egg production technology for infertility treatment
- Jun 2024Series A$7M
#10
Series B · Chiyoda City, Tokyo · founded 2004 · 100 employees$21Mraised▾
Provider of GX solutions, energy trading, and renewable energy platforms. They offer solutions to accelerate decarbonization for regions and businesses. The company provides a platform for circulating renewable energy. It also shares information through its original media regarding carbon neutrality.
- Aug 2023Series B$21M
#11
Series D · Chiyoda City, Tokyo · founded 2007 · 15 employees$30.5Mraised▾
Plastic processing technology developer. It is a cleantech company that develops technology for waste plastic processing. The company sets up supply chain processes to recycle waste plastic into usable materials which can be further used to manufacture clothes. The company establishes cooperative relationships with various stakeholders such as operators, related administrative agencies, and nonprofit organizations. They currently have 2 plants, one conducts pyrolysis recycling of mobile phones and E-waste and the other is involved in the production of bio-ethanol from cotton fiber.
- Sep 2022Series D—
- Feb 2022Series C$30.5M
- Sep 2021Seed—
#12
Series A · Minato, Tokyo · founded 2021$17.9Mraised▾
Provides GHG emissions from corporate activities and the supply chains
- Feb 2023Series A$17.9M
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
What Tokyo researches in climate adaptation
Tokyo's University of Tokyo and peers predominantly research flood and cyclone risk management with a cautiously concerned tone, recent output surging but mean stance reflecting measured optimism.
- The University of Tokyo26
- Tokyo Metropolitan University5
- Tokyo University of Information Sciences2
- Tokyo Institute of Technology2
- Tokyo University of Agriculture and Technology2
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.