For over a hundred years, Iwachu, located in Morioka city, Japan, has been one of the most well known and respected manufacturers of modern Nanbu ironware. Today, craftsmen at Iwachu pay respect to this tradition by infusing each Iwachu product with precision handcraftsmanship throughout the manufacturing process. Iwachu's tetsubin (iron tea pots) and cookware have earned a well deserved worldwide reputation for their superior quality, beauty, and lasting durability.

The production process of making Tetsubin usually consists of 64 to 68 steps. At Iwachu, most of this process is still done by hand and quality is strictly maintained and controlled by a master craftsman known as a "kamashi". It requires at least 15 years to become a full-fledged craftsman, and 30-40 years to become a "kamashi".