The signature looks like it might be Hiroshi Nakajima's, but I'm not sure if it's genuine. The rim shows the marks of a potter's wheel, so it was made on a wheel. It's semi-ceramic, semi-porcelain, so it's likely to have crackling. It has the classic double fish design. The blue ceramic plate is decorated with goldfish. - Color: Blue - Design: Goldfish decoration - Material: Ceramic Thank you for looking.