The Cast-Iron ware that we offer is from the Iwachu Cast Iron Company of Morioka, Japan. This company is famous for making fine Japanese Cast Iron Pots and Japanese Chagama, the big iron kettle used in the tea ceremony, and smaller portable tea-pot-shaped kettles called nanbu-tetsubin. Cooking in authentic cast-iron is said to bring out the natural, subtle flavor of tea and foods; it may be due to the fact that it gives a steadier and more even heat. Japanese cast-iron is known to be the very best in the world. The heavier the cast-iron, the better, as it allows for more careful cooking and a higher count of natural iron, nickel, and other natural elements necessary and essential for our health.