みずほキャピタル is the venture capital company of the Mizuho Financial Group; its own 会社概要 gives its 株主 as みずほ銀行 その他 and describes it as having started as the group's integrated venture capital company (みずほフィナンシャルグループにおける統合ベンチャーキャピタルとしてスタート) after the April 2002 reorganisation of the three predecessor banks' venture capital companies. Its stated business, per the reference-work entry, is 未上場会社の株式・社債への投資、投資事業組合の運営・管理、株式公開に関するコンサルティング - investment in unlisted companies' shares and bonds, operation and management of investment partnerships, and IPO consulting. The president's message states the company was founded in 1983 and has supported close to 1,000 portfolio companies to listing (創業以来1,000社に迫る投資先の上場を支援), and gives the firm's purpose as ともに挑む。ともに実る。 The firm organises itself around seven named fund families rather than a single thesis: 成長支援ファンド (its stated main fund, for companies aiming at rapid growth), ライフサイエンスファンド, グロースファンド (hands-on support for growth-stage startups), ベンチャーデットファンド (debt financing for growth companies), FinTechファンド, 事業承継・資本戦略ファンド (business succession and capital strategy for mid-sized and small companies), and 6次産業化ファンド (supporting the industrialisation of agriculture, forestry and fisheries). Its own portfolio-composition page breaks its book down by 業種, 成長ステージ (アーリー, ミドル, レイター) and 地域 (首都圏, 関西, その他国内, 海外) as of the end of March 2025, but publishes those only as composition, not as a stated focus.
Not publicly disclosed (no firm-wide 運用総額 is published; the largest single fund is 150億円, established 31 October 2023, and the firm states a cumulative 400億円 across the 成長支援ファンド series as of that date) AUM66/100 Power Score™1983 FoundedTokyo, Japan
The firm's own 会社概要 states 1983年7月27日に設立 - established on 27 July 1983.
2002
On 1 April 2002 the venture capital companies of the three predecessor banks are split and merged (旧3行系列のベンチャーキャピタル会社が分割・合併) and the company starts as the Mizuho Financial Group's integrated venture capital company. The reference work デジタル大辞泉 records this as 富士銀キャピタル株式会社 merging 東京ベンチャーキャピタル株式会社 and 興銀インベストメント株式会社 and taking the present name.
2013
みずほ成長支援投資事業有限責任組合, the first fund in the firm's main 成長支援 series, is established on 31 January 2013 with 100億円.
2016
みずほFinTech投資事業有限責任組合 is established on 16 March 2016 with 11億円.
2019
THE FUND投資事業有限責任組合 is established on 26 June 2019 with 200億円.
2020
みずほライフサイエンス第1号投資事業有限責任組合 is established on 6 January 2020 with 100億円.
2022
みずほグロースパートナーズ1号投資事業有限責任組合 is established on 20 October 2022 with 100億円.
2023
みずほベンチャーデットファンド投資事業有限責任組合 is established on 30 August 2023 with 100億円, and みずほ成長支援第5号投資事業有限責任組合 on 31 October 2023 with 150億円, the firm's largest single fund.
2025
みずほ事業承継・資本戦略投資事業有限責任組合 is established on 24 January 2025 with 出資金総額 100億円, announced jointly by みずほフィナンシャルグループ, みずほ銀行 and みずほキャピタル.