Nambu Tekki

Factory tours demonstrate the complete casting process — creating sand molds, pouring molten iron, removing castings, finishing surfaces, and applying color patina. The process is labor-intensive and requires years of skill. Each teapot is unique due to hand-finishing. The traditional coloring method uses tea liquor and iron oxide, creating black or brown patina. The iconic hobnail pattern (arare) covers the teapot surface with small raised dots, originally designed to increase surface area for better heat retention. Modern nambu tekki includes colorful enamel-coated interiors (easier maintenance) versus uncoated traditional versions (develop natural patina). Uncoated tetsubin should only be used for boiling water; coated versions can brew tea directly. Traditional tetsubin rust naturally inside; the rust is safe and adds iron to water. Collectors prefer the developing patina. Prices reflect craftsmanship level — mass-produced small teapots start ¥10,000; individual master-crafted pieces reach ¥100,000+. The weight distinguishes real cast iron from cheap imitations; nambu tekki is heavy and thick-walled. Authentic pieces are marked with maker's seal. The craft tradition spans 400 years, originating when the Nambu clan invited iron casters from Kyoto to serve the domain. Morioka's iron sand and casting skills enabled high-quality production. Nambu tekki teapots are now internationally recognized; high-end tea shops worldwide carry them. Workshops offer English pamphlets and welcome international visitors. Purchase directly from workshops for authenticity and better prices than department stores. The teapots improve with use — the interior patina seasons over time, enhancing water quality.