Iwachu Kettle

Yes. Because it is made of authentic cast iron, the kettle releases trace amounts of ferrous iron (Fe2+) into the water as it heats. This process softens the water and can make it taste noticeably sweeter and smoother, which is ideal for brewing delicate teas.

Rust is a natural characteristic of cast iron, but it is non-toxic and manageable. To prevent it, always empty the kettle completely after each use and leave the lid off so the residual heat can dry the interior thoroughly. Never leave water sitting in the kettle overnight.

While the kettle is made of cast iron, its compatibility depends on your specific induction cooktop's sensitivity and the base diameter of the kettle. We recommend checking your cooktop's manual to ensure it can detect a base of approximately 5.5 inches before use.

No, this is a traditional, uncoated cast iron kettle. This design is intentional, as it allows the iron to interact with the water to provide the health and flavor benefits associated with Japanese cast iron brewing.

Simply wipe the exterior with a soft, dry cloth after the kettle has cooled down. Avoid using soap, detergents, or abrasive scrubbers, as these can damage the finish and strip away the protective seasoning of the iron.