Marunouchi Innovation Partners key facts
- Marunouchi Innovation Partners is a growth equity firm based in Tokyo, Japan with 11 tracked portfolio companies.
- Notable positions include Fervo Energy, Mainspring, Boston Metal.
- PrivateMarketView records 1 deal participation by Marunouchi Innovation Partners.
- The team roster lists 16 people.
About Marunouchi Innovation Partners
Founded in 2022, Marunouchi Innovation Partners is a growth & expansion firm based in Tokyo, Japan. The firm seeks to invest in information technology, energy, B2C, clean technology, climate technology, infrastructure, lohas & wellness sectors. The firm is also an impact investor.
Investment activity
Marunouchi Innovation Partners joined 1 recorded round in the last two years. 1 round landed in the last 90 days. Most recently: Emerald AI (Series A, Aug 2026).
Marunouchi Innovation Partners portfolio at a glance
11 portfolio companies are on record for Marunouchi Innovation Partners, including Fervo Energy, Mainspring and Boston Metal.
11 of the 11 carry a recorded valuation.
Marunouchi Innovation Partners team
16 people are on record at Marunouchi Innovation Partners: 4 associates, 3 advisors, 2 managing partners, 1 partner and 6 others. Senior names include Etsuko Kobayashi (Managing Director), Nagi Suzuki (Managing Director) and Tomoaki Nakagawa (Director). 12 of them have a verified direct contact on file.
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- ·The top 10 names in the book — of 11 recorded positions
- ·Watchlist + alerts for Marunouchi Innovation Partners's activity
Portfolio
11 companies · priced for members| Company | Industry | Valuation | First invested | Role |
|---|---|---|---|---|
| Fervo Energy | — | ▮ | ▮ | ▮ |
| Mainspring | — | ▮ | ▮ | ▮ |
| Boston Metal | — | ▮ | ▮ | ▮ |
+ 8 more companies · all 11, priced and dated or a free account shows the top 10 names — no card Membership and data by Private Market View | ||||
Marunouchi Innovation Partners recent deals
1 recordedMembership and data by Private Market View
Partners, principals, and the people who answer a pitch. Pro members reveal contacts with credits.
Frequently asked about Marunouchi Innovation Partners
- What companies does Marunouchi Innovation Partners invest in?
- Marunouchi Innovation Partners has 11 recorded portfolio companies, including Fervo Energy, Mainspring, Boston Metal.