This yunomi was made as a demonstration piece when Hamada and Bernard Leach visited Camberwell School of Art and Crafts (now Camberwell College of Arts) in south-east London during the 1950's. It is uncertain whether the tea bowl remained unglazed because of the brevity of their visit to Camberwell, or whether Hamada intended to leave it so. Commenting on one of his own glazed pots Hamada wrote that "this type of paddled piece is also quite nice finished with just a coating of slip".1
Ewen Henderson (1934-2000) was the ceramics tutor at Camberwell School of art in the 1950's.
1. See Bernard Leach and Shoji Hamada, Hamada: Potter, (Tokyo, 1975), the pot illustrated pl.no.3, the note relating p.296.