Set of 5 navy blue teacups with a simple design. I don't know the details, but they belong to a family member who loves Arita-yaki, Shigaraki-yaki, Kutani-yaki, Hagi-yaki, etc., and after some research, I believe they are Arita-yaki. There is a signature on the back of the cups. - Quantity: Set of 5 - Color: Navy blue - Material: Ceramic - Inside color: Pale green - Design: Simple shape with blue characters Thank you for looking.