Knife sharpening with a whetstone (Kappabashi, Tokyo)

At the 117-year-old kitchenware store KAMA-ASA, in Tokyo, Jeremy Escudero demonstrates how to sharpen a knife using a whetstone.

The shop is located in the “kitchenware district" of Kappabashi, which once catered exclusively to professional chefs but now also draws enthusiastic home cooks.