Keiko Tamura

J-STAR Co. Ltd. (J-STAR) is a private equity arm of J-STAR Partner and is headquartered in Tokyo, Japan. The firm was founded in 2006.

TSS Co. Ltd. designs, develops and manufactures printed circuit boards used for power electronics, automobile, and LED lighting. Its products include general and special printed circuit board, Chips on Board (COB) type custom lighting emitting diode (LED), and LED lighting for growing plants. The company was founded on January 27, 2009 and is headquartered in Sagamihara, Japan.

Sanwa Service Group is a Japanese company that provides car dealership services. The company is based in Kiyosu, Japan. The company was founded in 2001.

Irohanihoheto Co. Ltd. operates as a holding company which provides the restaurant services through its subsidiaries. It developed various unique restaurants brands such as Echigoya, the charcoal-grilled dried-fish izakaya-restaurants, Shinpachi Shokudo, the fast-casual restaurants which provide charcoal-grilled dried fish, Yamatoya, the fresh-fish restaurants, Jiromaru, the standing-style yakiniku (Korean BBQ) restaurants, and POTA PASTA, the homemade pasta restaurants. The company is headquartered in Tokyo, Japan.

ActualEyes, Inc. is a Japanese company that conducts research and development of products such as regenerative medicine for corneal endothelial disease. The company is based in Kyotanabe, Japan. The company's mission is to deliver the desired light to patients suffering from visual impairment and to ensure and promptly implement a new treatment society. The company was founded in 2018. The CEO is Iku Sugioka.

WOLVES HAND Co., Ltd. provides veterinary services. It offers management of animal hospitals, seminars for veterinarians, grooming salons and pet hotels. The company was founded in March 1999 and is headquartered in Osaka, Japan.

Kairos & Co. provides senior housing management and nursing care services. It also engages in the construction and consultation businesses. The company was founded by Tadashi Takahashi in December 2012 and is headquartered in Odawara, Japan.

Nurse Call KK engages in the provision of home nursing care services. It also offers maintenance of overall daily living activities including health, medical, and welfare services. The company is headquartered in Nagoya, Japan.