Nambu ironware refers specifically to cast iron products made in Iwate. The prefecture, located in the northern region of Tohoku, has always been rich in minerals which allegedly prompted the construction of mines as early as the Nara Period (710–794). The city of Kamaishi is said to have given Japan its first gold find in history. Cast iron, however, wasn’t as coveted as it is now until the 17th century, when the head of the Nambu clan, which ruled the region for a few centuries, gathered the best metal workers in the country to define Iwate’s timeless ironware.
Nambu tekki is often described as a premium type of cast iron known for its incredible durability. Back in the Edo Period (1603–1868), when the craft was making its first waves in the country, households who could afford it would order custom teapots or kettles with detailed and evocative designs made to hand down to future generations.
Reference
https://www.tokyoweekender.com/2020/06/iwate-nambu-ironware/
Size:6 inches x 6 inches (Includes handle in up position)
Capacity:0.4L
■ Made in Japan
■ Materials : Nanbu Tekki casting (Body surface: Enamel processing)