Seasoned. To prevent rust, apply a white limescale coating before use. This has been carefully cultivated using hard mineral water, so you can use it with confidence. There is some minor rust, but it is harmless. Purchased about a year ago. Used approximately 10 times. I took good care of it, but I stopped using it because it became too much trouble, so I am selling it. A trivet is also included, so it will look great just by placing it in your kitchen. There is some minor rust, but it is harmless and not noticeable. The hot water boiled in a cast iron kettle will have iron dissolved in it, resulting in milder water. Coffee and tea will taste even better, and you can also supplement your iron intake. I discarded the box, but I have the instruction manual. Purchased for 18,700 yen (cast iron kettle) Purchased for 2,700 yen (trivet) For those who understand that this is a used item. I will use recycled cardboard for shipping. I will pack it carefully.