What J-STAR does

J-STAR Co., Ltd. is a Tokyo-based private equity investment firm founded in February 2006 that invests exclusively in Japanese small and medium enterprises (SMEs). The firm provides equity capital of JPY 1–3 billion per transaction alongside management expertise, business succession support, M&A advisory, and operational value creation. J-STAR operates six fund vehicles — J-STAR No.1 through No.5-A and an Environment Fund — with combined committed capital of approximately JPY 212 billion. Since inception, the firm has executed over 160 investments (more than 10 per year over the past five years) and has realized exits through trade sales, management buyouts, and IPOs, including the June 2024 listing of WOLVES HAND (TSE Growth: 194A).

J-STAR's revenue model is the standard PE two-stream structure: (1) management fees charged on its ~JPY 212B AUM across multiple limited investment partnerships, and (2) carried interest on successful exits. The firm does not operate a technology product or SaaS platform; its "product" is the deployment of fund capital into SME equity positions. Go-to-market is sales-led and relationship-driven, sourcing deals through industry networks, financial institution referrals, and its 160+ portfolio company ecosystem rather than through traditional marketing channels. J-STAR targets Japanese SMEs facing business succession challenges, capital constraints, management gaps, shareholder restructuring needs, and operational inefficiency, with investment themes spanning niche manufacturing, branded BtoC businesses, healthcare, unique business models, industry consolidation plays, and global expansion candidates. Exit strategies include trade sales (e.g., Shinpachi to Skylark Holdings), management buyouts, and IPOs.

The firm is led by Representative Director and CEO Rokuro Hara, with Managing Partners Hideaki Sakurai and Tatsuya Yumoto overseeing a team of 11 partners (as of January 2026), many with prior experience at JAFCO, MUFG, Nomura Securities, and Boston Consulting Group. J-STAR became a signatory to the UN-supported Principles for Responsible Investment (PRI) in 2014 and has received industry recognition including the AVCJ 2024 Deal of the Year (Mid Cap) for the jinjer investment and PEI's 40 Under 40 designation for Partner Kenta Shima in 2025. The firm has increasingly executed cross-border deals (notably Orange Connex Group in Hong Kong) and bolt-on acquisition strategies within portfolio platforms such as J Step Holdings in scaffolding services.

Name

J-STAR

Legal name

J-STAR Co., Ltd.

Website

http://www.j-star.co.jp

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

11–50 employees

Short description

J-STAR is a Tokyo-based private equity firm founded in 2006 that invests JPY 1–3 billion equity tickets into Japanese SMEs needing business succession, capital, or operational support, managing approximately JPY 212 billion across six fund vehicles and over 160 investments since inception.

Ownership category

akta.pro rank

Product category

Private Equity Investment Management

NAICS

Portfolio Management and Investment Advice (523940)

SIC

Investment Advice (6282)

akta.pro primary industry

SME Term Loans & Growth Capital (FSAKAGAB)

Keywords

• Private equity investment
• SME buyout financing
• Investment fund management
• Business succession financing
• Mid-market buyout

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Management Fees: J-STAR generates revenue through management fees charged on the funds they manage or advise. The firm operates multiple limited investment partnerships including J-STAR No.1 through No.5 and an Environment Fund.
2. Carried Interest (Performance Fees): As a private equity firm, J-STAR earns carried interest on successful exits from portfolio companies. The firm has executed multiple successful exits including 8 by Managing Partner Tatsuya Yumoto and 6 by Partner Satoru Arakawa.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

J-STAR is a Tokyo-based private equity investment firm that makes equity investments of JPY 1–3 billion into Japanese small and medium enterprises (SMEs). The firm operates multiple limited investment partnerships (J-STAR No.1 through No.5-A and an Environment Fund) with combined committed capital of approximately 212.2 billion yen, providing business succession financing, management buyout support, growth capital, and operational value creation to portfolio companies across sectors including manufacturing, healthcare, services, and consumer.

Product overview

J-STAR is a private equity investment firm that operates as a fund manager and investment advisor for Japanese small and medium enterprises. The company does not offer a technology product or SaaS platform. Instead, its offerings consist of six pooled investment funds (J-STAR No.1 through No.5-A and an Environment Fund) with combined sizes of approximately 212 billion yen, plus investment advisory and fund management services. The funds target SMEs across various sectors including manufacturing, healthcare, environmental services, and retail, providing equity investment, business succession support, management buyout financing, and operational value creation. J-STAR provides investment-related services to these funds including due diligence, investment opportunity recommendation, and portfolio company management support.

Differentiator

Problem solved

Functional benefit

Products and services

• J-STAR No.1 Limited Investment Partnership First fund in the J-STAR series with approximately 12 billion yen in committed capital, providing private equity investment services to small and medium enterprises in Japan. Established February 2006.
• J-STAR No.2 Limited Investment Partnership Second fund in the J-STAR series with approximately 20.6 billion yen in committed capital, focused on investment in Japanese SMEs. Established 2010.
• J-STAR No.3 SS, LP Third fund vehicle with approximately 33.3 billion yen in committed capital, providing investment-related services including due diligence and portfolio company support. Established 2016.
• J-STAR No.4-A, LP Fourth fund with approximately 49.5 billion yen in committed capital, focused on private equity investments in Japanese SMEs. Established 2020.
• J-STAR No.5-A, LP Fifth fund in the series with approximately 76.8 billion yen in committed capital, supporting growth and expansion of portfolio companies. Established 2023.
• J-STAR Environment Fund-A, LP Specialized thematic fund focused on environmental, sustainability, and ESG-related investments with approximately 20 billion yen in committed capital. Established 2022.
• Investment Advisory Services Regulated investment advisory and related business operations provided under Financial Instruments and Exchange Act Article 28 Paragraph 6, offered to funds managed or advised by J-STAR.
• Fund Operation and Management Services Management and administration of investment funds pursuant to Financial Instruments and Exchange Act Article 63 for qualified institutional investors, including due diligence, investment opportunity recommendation, and portfolio company management support.

Quantifiable outcome

• Over 160 investments completed since 2006
• +3 more outcomes

Named customers7 records

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Four partnerships are on record, tiered major and core.

• Takahashigumi Co., Ltd. and HB Co., Ltd.majorStrategic or Co-development Partner · 22 April 2025J Step Holdings (in which J-STAR fund invested) entered a capital alliance with Takahashigumi and HB, among the largest scaffolding specialists in Aichi Prefecture. The partnership expands J Step Holdings' operations into the Tokai region.
• Safety Step Co., Ltd. (Sapporo and Fukushima)coreStrategic or Co-development Partner · 27 June 2024J-STAR fund co-established J Step Holdings holding company together with Safety Step (Sapporo) and Safety Step (Fukushima) to create a national scaffolding services platform. The partnership combines regional market leaders to pursue nationwide growth through capital and business alliances.
• Hattori Kasetsu Kogyo Co., Ltd.coreStrategic or Co-development Partner · 27 June 2024J-STAR fund co-established J Step Holdings with Hattori Kasetsu Kogyo, a scaffolding services company with top market share in Kanagawa Prefecture. The partnership aims to expand scaffolding services nationally through the J Step Holdings platform.
• eBay GroupmajorStrategic or Co-development Partner · 1 January 2018Orange Connex Group was founded through a strategic partnership between eBay Group and China's CPE private equity fund. OC Group leverages eBay's global e-commerce platform data and networks for its logistics solutions business.

Scale indicators3 records

Recent moves13 records

Expansion highlights6 records

Direct peers

• Ant Capital Partners: Japanese PE firm with a buyout and growth equity focus. Both a comparable competitor and a buyer (C6-9 / Ant Capital acquired Honest from J-STAR), making it a dual peer.
• Integral Corporation: Tokyo-based PE firm investing in Japanese SMEs via buyouts and growth capital. Direct competitor for SME succession deals with similar fund-size profile and Japanese mid-market focus.
• JAFCO: Japan's largest venture capital and PE firm and the institution where J-STAR's founders built their early careers. Directly comparable as a Japanese SME-focused PE investor with multiple fund vintages and similar investment size profile.
• Nihon M&A Center: Japan's leading M&A intermediary focused exclusively on SME business succession transactions. Comparable business model targeting the same founder succession pain point, though executed through brokerage/advisory rather than direct equity investing.
• Japan Industrial Partners: Tokyo-based PE firm focused on Japanese mid-market buyouts and turnaround investments. Highly comparable in investment size range, domestic-only focus, and target SME profile.
• MKS Partners: Independent Japanese PE firm focused on mid-cap buyouts and growth capital. Directly comparable in deal sourcing networks, target segment, and exit strategies.
• Polaris Capital Group: Japanese PE firm specializing in buyouts of mid-sized Japanese companies. Closely comparable fund strategy, ticket size, and target customer profile to J-STAR.

Broad incumbents

• Carlyle Group (Japan): Global mega-fund with a long-standing Japan platform investing across mid- and large-cap. Increasingly competing for SME-adjacent deals in Japan, especially as it broadens its local presence.
• Bain Capital (Asia/Japan): Global PE firm with established Japan presence targeting mid- and large-cap transactions. Represents a broader-incumbent threat as it increasingly moves into J-STAR's mid-market territory.
• KKR Japan: Global alternatives giant with active Japan PE franchise. Competes for mid- and large-cap Japanese deals and has been expanding its mid-market origination in the country.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Subsidiaries5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A14 records

Investments36 records

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about J-STAR