This piece I believe to be a hagi-yaki mizuzashi. The glaze color and incised decoration shows a strong Korean influence owed to the Korean pottery tradition brought to Japan during the early 17th century occupation of Korea by the forces of Toyotomi Hideyoshi. The big (?) handles and knop (?) top are design elements often seen on chirashi. This particular form, however, does appear to be a mizuzashi (Water vessel used in the Tea Ceremony). The speckled, coarse body looks like Hagi clay...