Marunouchi Innovation Partners is a $720-744M climate tech growth fund backed by major Japanese corporates including Mitsubishi Corporation and MUFG Bank that specifically targets late-stage climate companies moving from technology validation into commercialization and scaling. The fund focuses on six defined climate tech pillars—next generation energy, renewable energy & grid, batteries & electrification, carbon removal, sustainable materials, and climate software—while leveraging its corporate backers' industrial networks to help portfolio companies access customers and deployment channels primarily in Japanese and Asian markets.