This is the "Mayu-SS" iron teapot from Kikuchi Hojudo, a long-established Yamagata casting workshop. It was designed by industrial designer Kiyoyuki Okuyama. It has a capacity of 330ml (about 2 cups) and weighs 550g. The inside is enamel-coated, making it rust-resistant and easy to care for. It can be used not only for Japanese tea, but also for black tea, Chinese tea, and as a pour-over coffee pot. It has a good flavor from being used for many years.