Japanese Tetsubin: Cast Iron Teapots Explained
Nanbu ironware โ beautiful, functional, and built to last.
What Is a Tetsubin?
A tetsubin (้็ถ) is a Japanese cast iron kettle used to boil water for tea. Originating from Iwate Prefecture's Nanbu ironware tradition (400+ years old), tetsubin are both functional tools and art objects.
Tetsubin vs Tetsu Kyusu
Tetsubin โ for boiling water directly on a stove. No enamel lining. The iron enriches the water with minerals.
Tetsu Kyusu โ for steeping tea. Enamel-lined interior. Cannot be heated on a stove. This is what most Western retailers sell as "cast iron teapot."
Benefits
- Better-tasting water โ Iron softens water and adds trace minerals
- Heat retention โ Keeps water hot for 30+ minutes
- Durability โ With proper care, lasts generations
- Beauty โ Each piece features traditional Japanese patterns (arare dots, pine needle, cherry blossom)
Top Brands
- Iwachu โ Largest Nanbu ironware maker. Reliable quality. ยฅ8,000-30,000.
- Oigen โ Modern designs meets tradition. ยฅ10,000-40,000.
Care
Never use soap. Dry completely after each use to prevent rust. If rust appears, boil tea leaves in it โ the tannins create a protective coating.
Looking for more? Browse our curated product picks โ all available to ship from Japan.