Japanese teapot and cups

Very nice vintage tea set consisting of a teapot and 4 stoneware tea bowls. Stylized decoration in blue and brown tones hand-painted on a speckled gray background with brown borders (the decoration is different on both sides of the teapot. The speckled stoneware teapot has a rattan handle. Teapot dimensions: height 12 cms, diameter 14 cms. The bowls 8 cms in diameter and 5 cms high. Good condition, no defects or wear from time. No indication of brand or provenance.