I'm not sure how much it's been used. I think there is some deterioration, but it seems to be a beautiful item. [Tea Ceremony Utensils/Tea Ceremony Tools: Furo Kama (for Furo)/Okiroro Kama (for Okiroro)] Hiramarugama with Shrimp, made by Seikou Sato, with Kama Kan (pot ring)