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Japanese cast iron lined teapot safety and health, with infuser basket pouring hot tea

Cast Iron Teapot Health & Safety

When you decide to purchase a cast iron teapot, you assume it is safe to use.  But, these days, there are countless companies making Tetsubin style teapots from around the world.
How do you know the teapot's lining won't leach heavy metals, including lead?  There are multiple ways that heavy metals can leach from the ceramic lining.  If it wasn’t applied appropriately to the interior of the teapot, if the porcelain enamel liner itself was not formulated correctly or what if it was not  fired at the appropriate temperature or for the necessary length of time?
In most cases, we have to simply trust.  And that's not good enough.

Why Japanese Iwachu Iron Teapots are Safe to Use

Japanese Tetsubin cast iron teapot safety, Red Dragonfly Iwachu Japanese cast iron teapot with tea leaves and white cup of tea, Iwachu teapot certificate of safety regarding leaching of heavy metals
Japanese made Iwachu cast iron teapots provide certified laboratory testing reports authorized by Japan’s Ministry of Health (February, 2021).  These teapots were tested using a standard laboratory leaching method to detect Cadmium, Lead, Mercury and Chromium, some of the most common heavy metals to cause human poisoning.  These contaminants are usually absorbed through water, food and air.  
The lab results pictured below show none of these heavy metals, including lead, were detected.

The English translation of the lab report and the original lab report in Japanese are displayed below.

Please contact us if you have any questions!

English version lab tests for Iwachu Japanese cast iron teapot safety, no heavy metals detected in leaching tests, safety of Tetsubin cast iron teapots
Japanese version lab tests for Iwachu Japanese cast iron teapot safety, no heavy metals detected in leaching tests, safety of Tetsubin cast iron teapots
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Sensational Teas specializes in Japanese iron teapots, kettles, tea accessories and fresh loose leaf teas.

Sensational Teas
Po Box 26, Corvallis, OR 97339
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(541) 887-0188
9-5 Monday-Friday (PST)


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  • Welcome
  • SHOP
  • Contact
  • HELP
    • Use & Care Tetsubin Cast Iron Kettles
    • Use & Care Japanese Iron Teapots
    • Iron Teapot Safety
    • Shipping & Returns/Exchanges
    • Customer Feedback
    • Privacy Policy
    • About