Plate with two schematic figures in a fenced garden

Porcelain plate with a scalloped rim, painted in underglaze blue. On the flat surface two schematic figures in an enclosed garden with flowering plants in the background. The rim with a band with flowering plants near rocks. The outer wall with three wavy lines. The underside partially unglazed. Old label on the underside with 'P 3779/ Japan 18th century/ f. 150'. Blue and white.