Tetsubin

A cast iron kettle, traditionally used to heat water for tea, prized for its heat retention and the way it can subtly enrich the mineral content of the water within.

Material & Construction

Cast iron, often with a decorative textured exterior and, in traditional versions, an unlined or minimally lined interior.

Traditional Uses

Heating water specifically for tea preparation; some believe iron leaching from an unlined interior can be a minor beneficial source of dietary iron, though this is not the primary reason for the tool's continued use.

Modern Availability / Equivalents

Widely available through Japanese specialty retailers, including many decorative versions intended more for display or gift-giving than heavy daily use.

Care & Maintenance

Dry thoroughly after each use to prevent rust, particularly for unlined or minimally lined versions; avoid harsh detergents.