YOON founded AMBUSH® along with VERBAL in 2008 as an experimental line of jewelry ‒ innovative pop art inspired designs capturing a distinct Tokyo aesthetic. The iconic trademarked POW!® motif received wide media coverage around the world. With apparel created as a canvas to complete the aesthetic YOON envisioned, AMBUSH® evolved into designing unisex ready-to-wear collections. The brand made its Paris debut in 2015 with YOON and VERBAL being listed as two of Business of Fashion’s Top 500 people influencing the global fashion industry for 4 consecutive years since 2015. In 2017 AMBUSH® was selected as one of the top 8 finalists for the LVMH PRIZE.
AMBUSH®’s uniquely crafted parts form an idiosyncratic style that led to commissions and collaborations with an illustrious list that includes Louis Vuitton (Kim Jones), sacai, UNDERCOVER, SHU UEMURA, Nike, Converse, Rimowa, and Gentle Monster. In 2018 AMBUSH® presented the brand's first runway presentation as part of Amazon Fashion Week Tokyo. The same year, Kim Jones named YOON as Director of Jewelry for Dior Men, with the first creations for the house debuting with the S/S 2019 collection in Paris.
AMBUSH® opened its first flagship store on September 2nd 2016 in Tokyo, a space which encapsulates the brand’s ethos in a creative environment under one roof with the design studio.