Ashiya Yamate o Dogu Geihinkan

One spring day, the "Sensei" (Teacher/Master) living in Ashiya, Hyogo, digs up a beautiful tea bowl in their garden. A Tsukumogami (a spirit inhabiting an artifact) was attached to the white Tenmoku tea bowl, and the Sensei names it "Shiro-san" and begins living with it.

Although Shiro-san vaguely retains memories, he cannot recall why he was buried in that location...