If you duck under tree branches, wade up a stream and climb over rocks, you will find a secret place of wasabi patches, tended by the Tsunoi brothers. Farmers have long cultivated wasabi over Okutama's stone terraces-stacked one rock at a time-in a place where spring water constantly flows. But super-aging has hit the farming community. The Tsunoi brothers have stepped in by not only growing wasabi, but also creating recipes using it to keep the tradition going.