Tatsuya Yumoto

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.

1k, Inc. engages in the provision of internet information services. It manages and operates folk, a lifestyle media platform for women focusing on fashion, interior and hairstyle genres. It also launched manetasu, a platform to understand money questions. The company was founded by Yasuaki Kimura on December 15, 2010 and is headquartered in Osaka, Japan.

NHS KK engages in life insurance business. It also offers consultation services for pension funds, asset management, and inheritance. The company was founded in January 2012 and is headquartered in Tokyo, Japan.

N Holdings Corp. is a Japanese company founded in 2019 that conducts teleworking and provides business services. The company is based in Tokyo, Japan. The company's website provides information about the company and its services, as well as notices about new information and updates. The company's copyright is owned by N Holdings and its website is powered by WordPress.

Paiza, Inc. engages in the media business and in the provision of online programming self-learning sites. Its products include EN:TRY, a programming site for inexperienced people and paiza.IO, an online editor and compiler. It also offers video learning services, paiza video learning, and programming skills-check. The company was founded February 13, 2012 and is headquartered in Tokyo, Japan.

Sokisha Corp. provides telemarketing services, online direct sale of products and services, English lessons for children, outsourcing contract and insurance agency business. The company was founded on October 7, 1996 and is headquartered in Yokohama, Japan.