Organization · Private Equity
J-STAR
J-STAR Co., Ltd. is a private equity investment firm based in Tokyo, Japan, focusing on buyouts of small and mid-sized enterprises (SMEs). The firm enhances the value of its portfolio companies through strategic partnerships and operational improvements.
Overview
What J-STAR does
What J-STAR is
J-STAR Co., Ltd. is a private equity investment firm based in Tokyo, Japan, focusing on buyouts of small and mid-sized enterprises (SMEs). The firm enhances the value of its portfolio companies through strategic partnerships and operational improvements.
How it participates in the startup ecosystem
The current public profile supports funder capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.
Operational profile
Organization status and context
Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.
- Operational status
- Active
- Organization type
- Private Equity
- Founded
- Founded in 2006
- Approximate age
- About 20 years
- Structured capabilities
- Funder
- Last reviewed
- April 10, 2026
Official channels
Find J-STAR elsewhere
Open the official website or a supported primary organization account.
Capability profile
J-STAR as a funder
Investment thesis
J-STAR targets Japanese SMEs across diverse sectors, focusing on buy-and-build strategies through operational improvements and bolt-on acquisitions.
Focus narrative
J-STAR invests primarily in small to mid-sized Japanese companies, focusing on niche manufacturing, brand and media-related businesses, unique business models, industry reorganization, and global expansion. The firm typically makes equity investments ranging from JPY 1 billion to JPY 3 billion, with an investment holding period of approximately 3 to 7 years.
Value beyond capital
J-STAR adds value to its portfolio companies through operational improvements, strategic partnerships, and a commitment to ESG principles. The firm employs a buy-and-build strategy to enhance growth and profitability.
Terms and economics
- Typical check
- $10,000,000–$25,000,000
- Sweet spot
- $15,000,000
Focus and fit
- Stages
- Friends and Family · Angel · Accelerator · Pre-seed · Seed · Seed+ · Series A · Series A+ · Series B · Series B+ · Series C · Series C+ · Series D · Series E · Series F · Growth Equity · Pre-IPO · Ipo · Secondary · Bridge · Recap
Availability
- Currently deploying
- Yes
Portfolio and track record
- Recorded portfolio count
- 100
- Recorded notable exits
- Platia
Portfolio context
J-STAR has a diverse portfolio that includes sectors such as manufacturing, healthcare, environmental services, BtoB services, and consumer businesses. Notable investments include jinjer, a company acquired in collaboration with Potentia Capital, and the formation of a conglomerate from four waste-management portfolio companies.
Common questions
What to know about J-STAR
Upseed classifies J-STAR under the Private Equity organization type. Its current public profile includes funder capabilities.
Source and update disclosure
Know what this page is based on
Source basis
Public organization and program material, official websites, and structured Upseed records.
Last reviewed
April 10, 2026
Known limits
Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.
Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.