Torato Natural Whetstone. This is a whetstone of approximately 5000-6000 grit. With its unique striped pattern and strong abrasive power, it has been a popular whetstone for a long time. It is no longer mined and is one of the hard-to-find famous whetstones. ・As it is a natural whetstone, there may be patterns, cracks, and small chips, but this does not affect its use. ・The surface has been flattened, but it will be more effective if you lightly adjust the surface before use.