A fine and early museum quality complete set of five Ko-Imari, Kakiemon style cups or choko. Blue underglaze and green, red, aubergine, yellow and black overglaze enamel decoration of peonies and prunus blossoms in garden landscape with rockery and fence. Traces of rubbed gilt enameled highlights. The choko form saw many uses such as teabowls (also seen in early European ceramics after Japanese examples of the period), large sake cups, and mukozuke. We estimate from the delicate but sure potting, the free hand but care of painted decoration, and color of enamels that these cups are Genroku era - late 17th to early 18th century. Each with blue underglaze spurious six character Chenghua mark in single blue circle inside a narrow ring foot. Very good condition considering age and use with expected light scratching to surfaces from use over the centuries and minor imperfections as would be expected from the period. One with an attractive, old gold lacquer filled stable line from the rim - that bowl also rendering a pleasant resonance when lightly tapped. Diameters are not perfect circles but longest length of each is nearly 4 inches diameter (about 10.15 cm). Height (and foot diameters) similarly varies near 2 1/2 inches (6.35 cm). We acquired this set with an old, labeled tomobako in which we continue to store the cups. The label reads "Ko-Imari choko go kyaku, inokuchi" (the last term, inokuchi, referring to the possible use of this five piece set as sake choko.) The box (missing its top) apparently having started its life with the cups, it is understood that the cups are earlier.