Japanese tea set marking

I'm just wondering if anyone knows anything about the marking/back stamp on this milk jug I have a full set of 21 pieces consisting of 1 teapot 1 large sugar bowl with lid 1 milk jug as seen in the picture 9 cups and 9 saucers all the pieces have the same marking and have the same patern of guiesha girls the milk jug i think is handpainted as there are raises over the area where the white spots are but I could be wrong would like to know more about the marking so I can do some research many thanks