 Along with most of his Toryumon class, Sugi joined the Dragondoor promotion in July 2005.He was introduced in a vignette by top babyface Taiji Ishimori, who described him as a close ally carrying the genes of Último Dragón.As such, Sugi appeared as , a character wearing a mask and suit patterned after Dragón, very much like the wrestler Dragon Kid from rival promotion Dragon Gate.