This is a cast iron trivet with a Tsurugi (sword) motif, made of Nambu ironware in Morioka City, Iwate Prefecture in the Tohoku region. It is characterized by a row of small protrusions called "Arare," which is a typical pattern of Nambu ironware.

It is said that the "Arare" pattern is an expression of a scene where hail falls.
The hazy landscape looks like a drizzle with smaller grains than rain. This is expressed by the fine dots. The dots are hand-applied to the mold one by one.

This is a must-have item to protect your table from damage, and since it is small, it is recommended to use it together with the teapot.
Of course, you can also use it with your own teapot or ovenware.