The source of the name “KOHAN IPPEN” refers to the phase from a classical Chinese poem. The piece is made by using a hand-forming technique and sculptural process of trimming, which is the traditional style of Raku ware. This is a thin, shoe-shaped tea bowl. The notched lip is rightly warped like mountain roads and partially trimmed with a spatula. From the mouth to the low hip, a cobalt glaze is poured in a belt shape contrasting with the underlying tone of an ash glaze. It looks as if the horizon beyond the sky. From the mouth to the foot, a light green, a black glaze gently flows in a vertical line one by one. This work is one of the “Day Voyage” series.