This is a striking oval shaped blue and white Ko-Imari bowl with a design in the center of a curled dragon. The sides of the bowl are lightly fluted in a low relief petal design. The rim has a dark brown glaze and is very slightly fluted. The bowl measures 7.3" long by 4.5" wide and is 1.6" deep. (The stand in photo #1 is not included.) It has a slight tilt to it - whether by design or a bit of mis-shaping in the kiln - it is not possible to say. Early Imari wares were actually made in the town of Arita in the southern Japanese island of Kyushu. In Japanese, Ko-imari means “ancient Imari”. Imari was the name of the port from which these items of porcelain were shipped.
On the base of the bowl there is an underglaze blue mark. My colleague who does our translations for us, Edward Kawanabe of "Sanai Antiques" advised the following: The marking is called "Yama Fuku" (mountain fuku) - it is simplified from the "Uzufuku"(swirl fuku) marking which appears on late 1780-90's Ko Imari pieces. The Japanese Kanji word "Fuku" translates loosely as fortune - blessing - luck - and wealth. We date the bowl to the mid 1700s, Edo Period. It is in excellent condition with no chips, cracks, or other condition issues. A superb example of mid Edo Japanese porcelain.