Japanese cast iron, also known as Nambu or Yamagata ironware, is a traditional Japanese craft that involves creating handcrafted cast iron products such as teapots, kettles, and other household items. This craft originated in the Morioka region of Japan in the 17th century, and it has been passed down through generations of artisans.

The process of making Japanese cast iron involves pouring molten iron into sand molds, which are then cooled and removed to reveal the cast iron product. Nowadays the cast iron is then often coated with a layer of enamel to protect it from rust and to make it easier to clean.

Japanese cast iron products are known for their durability, heat retention, and beautiful designs. They are often decorated with intricate patterns and motifs inspired by nature, such as cherry blossoms, bamboo, and dragonflies. The traditional techniques used to create these products ensure that they are of the highest quality and are designed to last for many years.