Mitsuo Aida Magic Yunomi (Teacup) This is a yunomi (teacup) designed with a poem by Mitsuo Aida. Initially, the design is black with the words "Okagesan" written on it, but when you pour hot water or tea into the yunomi, the black surface changes color, revealing another poem underneath. • Black yunomi • The large characters say "Okagesan" Although it is unused, it has been stored at home, so the box has stains, peeling letters, and is slightly crushed, but the yunomi inside is in beautiful condition. Thank you for looking.