Satoru Arakawa

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.

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.

Wolves Hand Co., Ltd. provides veterinary services. The private company is based in Tokyo, Japan.

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.