Styson art modern mosaic, Japan, two 5" and 50 similar items

Two 5" mosaic plates made in Japan by Styson, blue one has some discoloration in the middle, I see no other damage. Original sticker on brown plate. I will be listing a number of items from another 2021 estate sale, I do as much researching as I know how to, but I am always looking for additional information. I will include on the listing as much as I know. Please ask questions. I do not ship outside the lower 48 states. I am trying to sell a number of items that I have accumulated over many years, I certainly don't hold myself out to be an expert in anything, however, I do describe to the best of my ability. Please, if I have made an error in my listing, take the time to point it out to me, I would appreciate it and I am sure anyone interested in purchasing the item, would also appreciate it. Thank You