Yokode no kyusu (横手の急須) literally means "side hand tea pot". 

This is widely used in Japan for preparing Sencha green tea. The shape was made to be efficient when pouring tea in small amounts quickly distributing among several cups (the tea at the end of pouring tends to be stronger than at the beginning).

Teapot :  x 3; 1 10 oz. Comes with fine mesh metal screen on inside of pot for filtering tea leaves from liquor.