Suibokuga are monochromatic black ink paintings that use methods of shading, bold and light brushstrokes to create images and atmospheric elements that change depending upon the quality of paper on which they are painted. Originally brought to Japane from China in the Kamakura period (1185-1333), ink painting was used primarily in religious paintings connected with the teaching of Zen. However, by the 15th century, many artists adapted the suibokuga style to subjects such as landscapes, flowers, animals and birds.