Showa retro pottery. I can't provide a detailed explanation. I'm unsure what it's used for, but I'll sell it to someone who knows more. It looks clean, but please be aware that there may be overlooked imperfections. Returns are not accepted after purchase. I will sell it to those who are okay with used items, even if there are stains or scratches. Please refrain from purchasing if you are looking for perfection. The size is shown in the image. #pottery #Showaretro #tableware #antique #vintage #Japanesetableware