星島 聖二朗
Hoshijima Seijiro
In 2005, he co-founded a design company.
After retiring from the company's board of directors in 2007, he joined a venture company. He was appointed to the board in 2013.
(The company was listed on Mothers in 2016 and changed to the First Section of the Tokyo Stock Exchange in 2017.)
In 2020, he left the company and established Kokonoka LLC.