Thanks! Thats a heavyweight horsebutt in choco. Thats what Shinki used to call that dark brown color. But I am not sure it has the same finish as the oiled horsebutt we are seeing on the market. I bought the leather 2 years ago and it was 5mm thick before I had it split for making the boots. The topy is from Arakawa Sangyo. Shonan is a renowned tannery in himeji that produces only a small variety of leather unlike shinki and tochigi. The insoles, outsoles and stiffeners are their shoulder and bend.