Jun Kitamura joined DeNA in 2009, where he worked across a wide range of businesses including e-commerce platforms such as Bidders, au Shopping Mall, and Seiyu Net Supermarket. Then he led new business initiative of Chirashiru, and contributed to multiple healthcare services including Shumi-to Club, Aruite Otoku, MYCODE, and kencom. In 2025, he joined Delight Ventures, where he is engaged in venture building, supporting early-stage startups through initial product development and business launch.