Korgencowa These are the first Kowa frog finger puppets, the ancestors of Kero-chan and Koro-chan, in green and pink. Made of vinyl chloride. First finger puppets (Showa 33 - 1958) As these are old items, there is some discoloration, dirt, and scratches. Please check the images carefully and understand this before purchasing. Please refrain from purchasing if you are concerned about minor details. No individual sales.