does anyone know what this is, it is porcelain and 4.6 and 3.2 inches high
Hello,
you are right, this is japanese, but not antique in my eyes. The decoration is inspired from japanese imari "black ship nanban", made in late 19./early 20.century. It has something to do with an oversea trade route betweeen Europe (esp. Portuguese and Dutch) and Japan.
The pieces from late 19./early 20.century looks different and have another mark and handpainted. These here seems to be printed.