J-Star Co. Overview

  • Investor Type
  • PE/​Buyout

  • Status
  • Active

  • Professionals
  • 21

  • Investments
  • 60

  • Portfolio
  • 25

  • Exits
  • 24


J-Star Co. General Information


Founded in 2006, J-Star Co. is a private equity firm based in Tokyo, Japan. The firm focuses on controlling buyout / co-controlling buyout deals. The firm targets mid- to small-sized Japanese companies. The firm focuses on the healthcare, business outsourcing, IT/Service, manufacturing, media, transport, retail, and financial sectors.

Contact Information

Year Founded
Investor Status
Actively Seeking New Investments
Trade Association
Principles for Responsible Investment (PRI)
Primary Investor Type
Other Investor Types
Asset Manager
Primary Office
  • Suite 622, Shin-Kokusai Building 6F
  • 3-4-1 Marunouchi Chiyoda-ku
  • Tokyo, 100-0005
  • Japan

J-Star Co. Investments (60)

Company Name Deal Date Deal Type Deal Size Industry Company Stage Lead Partner
0000000 0000 00000 15-Oct-2021 00 000000000 Other Healthcare Services Generating Revenue
000000 24-Feb-2021 0000000000 IT Consulting and Outsourcing Generating Revenue
000-00000 12-Feb-2021 0000000000 Human Capital Services Generating Revenue
00000 (00000) 15-Dec-2020 0000000000 Distributors (Healthcare) Generating Revenue
Shirayuki Fuukin 26-Nov-2020 Buyout/LBO Other Consumer Durables Generating Revenue 0000000 000000 0000
You’re viewing 5 of 60 investments. Get the full list »

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J-Star Co. Exits (24)

Company Name Exit Date Exit Type Exit Size
000000 (00000 000 15-Mar-2022 0000000000
00000 0000 04-Sep-2021 000 00 00000000
00000 20-Jul-2021 000 000.00
00000 0000000000 21-May-2021 000000000000000000
Aki-Japan 15-Apr-2021 Corporate
You’re viewing 5 of 24 exits. Get the full list »

J-Star Co. Investments by Industry, Year, and Region

Investments by Industry

Investments by Year

Investments by Region

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J-Star Co. Team (31)

Name Title Deals Funds Boards Office
Gregory Rokuro Hara Founder, Chief Executive Officer, Managing Partner & Head of Investment Committee 00 0 Tokyo, Japan
Hideaki Sakurai Founding Member , Managing Partner & Investment Committee Member Tokyo, Japan
Kenichi Harada Managing Partner, Founding Member & Investment Committee Member 0 0 Tokyo, Japan
Tatsuya Yumoto Partner & Investment Committee Member 0 Tokyo, Japan
Satoru Arakawa Partner & Investor Committee Member Tokyo, Japan
You’re viewing 5 of 31 team members. Get the full list »