Wooden Netsuke (strap) of Ichinen-Butsuma (Buddha-Devil) It's a fairly large size, so it's recommended to attach it to a bag! What is Ichinen-Butsuma? Buddha and devil are two sides of the same coin, and exist only in the space of a single thought. When you think good thoughts, your heart is a Buddha; when you think evil thoughts, your heart is a devil. It means that people can become good or evil depending on how they think.