 Kiyonobu focused almost exclusively on producing billboards and other promotional material for Edo's kabuki theaters; the relationship between the theaters and the Torii school was a strong and important one, and one that continues today.Guided by the need to attract attention, Kiyonobu's style tended towards bold, colorful exuberance.In addition to a distinctive use of color, details, and various other aesthetic elements, the Torii style is especially distinguished by the use of thick, bold line.