Investors / Japan / Marunouchi Innovation Partners
Marunouchi Innovation Partners
Venture capital · Tokyo, Japan · Asia Pacific
Marunouchi Innovation Partners is a fund management company established as a joint venture with Mitsubishi Corporation as main sponsor, Mitsubishi UFJ Bank and Pavilion Industries. It manages the Marunouchi Climate Tech Growth Fund L.P., which provides growth capital to startups with advanced climate tech.
Invests inEducationIndustrial & Manufacturing
In its own wordsclimate techdecarbonizationrenewable energyenergy storagecarbon capturegreen materials
Your fit with Marunouchi Innovation Partners
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsMarunouchi Innovation Partners lists 12 checked portfolio companies on its own site and is named in 6 funding rounds. Its most frequent entry is Growth, 50% of the companies with a known first round. Its largest themes are Education (38%), Industrial & Manufacturing (19%) and AI & Machine Learning (14%). 78% of its companies are based in United States. It invests most often alongside DCVC, Aramco Ventures and B Capital.
Counts come from funding rounds that name Marunouchi Innovation Partners, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Entry stage
share of companies by the stage of its first roundShow as a table
| Value | |
|---|---|
| Pre-seed | 0% |
| Seed | 0% |
| Series A | 17% |
| Series B | 33% |
| Growth | 50% |
Activity by year
rounds it joined, last 10 yearsShow as a table
| Total | Rounds it led | |
|---|---|---|
| '17 | 0 | 0 |
| '18 | 0 | 0 |
| '19 | 0 | 0 |
| '20 | 0 | 0 |
| '21 | 0 | 0 |
| '22 | 0 | 0 |
| '23 | 0 | 0 |
| '24 | 0 | 0 |
| '25 | 3 | 0 |
| '26 | 3 | 0 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 30th | 12 companies |
| Recent activity | 76th | 3 rounds in 12 months |
| Early stage | 54th | 0% of entries at pre-seed or seed |
| Evidence | 100th | 50% of companies confirmed by a round |
| Sector focus | 70th | 38% in its largest sector |
| Reach | 58th | 3 countries |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| Education | 38% | 7% |
| Industrial & Manufacturing | 19% | 7% |
| AI & Machine Learning | 14% | 18% |
| E-commerce & Marketplaces | 10% | 5% |
| Space & Defense | 10% | 3% |
| Climate & Energy | 5% | 1% |
| Real Estate & Construction | 5% | 3% |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers12100%
- No longer answers00%
- Points to another company00%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| DCVC | 4 |
| Aramco Ventures | 3 |
| B Capital | 2 |
| ClearSky | 2 |
| Congruent Ventures | 2 |
| Elemental Impact | 2 |
| Energy Impact Partners | 2 |
| Fine Structure Ventures | 2 |
Co-investor network
who it backs companies with, and who they back togetherCompare Marunouchi Innovation Partners head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Recent portfolio activity
when companies last raised with Marunouchi Innovation Partners| Date | Company | Stage |
|---|---|---|
| 12 Oct 2026 | Series C+ | |
| 25 Aug 2026 | Series A | |
| 23 Feb 2026 | Series C+ | |
| 13 Nov 2025 | Series B | |
| 3 Jul 2025 | Series B | |
| 14 Apr 2025 | Series C+ |
Round details for Marunouchi Innovation Partners
Amounts, full round histories and every co-investor in Marunouchi Innovation Partners' rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
12 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| The company provides energy solutions, including solar panels, heat pumps, and energy storage systems, to households and businesses. | EducationEducation | Oct 2026Series C+ | Page + round | |
| Amogy provides onsite power and ammonia energy solutions, including power generation and hydrogen production systems. | EducationEducation | Portfolio page | ||
| Boston Metal produces high-value metals from a wide range of inputs using its Molten Oxide Electrolysis technology | Industrial & ManufacturingClimate & Energy | Portfolio page | ||
| Emerald AI makes AI's power demand flexible, transforming data centers into valuable grid partners | AI & Machine LearningSpace & Defense | Aug 2026Series A | Page + round | |
| Fabric8Labs develops and manufactures 3D metal printed components using electrochemical additive manufacturing technology | AI & Machine LearningAI & Machine Learning | Nov 2025Series B | Page + round | |
| Fervo Energy develops next-generation geothermal projects to deliver 24/7 carbon-free energy. | EducationEducation | Portfolio page | ||
| Infinitum develops and manufactures advanced motors and power electronics technologies | Industrial & Manufacturing | Portfolio page | ||
| GridPoint uses intelligent software to analyze data from buildings' systems to help save energy and money | EducationIndustrial & Manufacturing | Portfolio page | ||
| Hived provides same-day, next-day, and two-day electric parcel delivery services | E-commerce & MarketplacesSpace & Defense | Jul 2025Series B | Page + round | |
| Mainspring Energy delivers firm, flexible power when and where you need it. | Industrial & ManufacturingE-commerce & Marketplaces | Apr 2025Series C+ | Page + round | |
| Omnidian provides performance assurance, management, and servicing for solar and battery storage systems | EducationReal Estate & Construction | Portfolio page | ||
| Feb 2026Series C+ | Page + round |
About this data
site last read 5 Nov 2026- Site
- marunouchi-innovation.com
- Last read
- 5 Nov 2026
- Watching since
- 5 Nov 2026
- Rounds since
- 14 Apr 2025
- Companies checked
- 12
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
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