Kengo Kuma has a philosophy: to enrich the connection between buildings and nature, “almost tuning-in” to the materials. His architecture is inspired by traditional Japanese design, and he is a serious critic of the global dominance of concrete. Kuma’s mission has manifested in iconic buildings including China’s Folk Art Museum, the V&A in Scotland, and Japan’s National Stadium, built for the 2020 Olympics. Broadcaster Nick Luscombe follows Kuma to Japan’s oldest and largest lake, and to the ancient capital of Otsu, where Kuma is attempting to represent the history of the area not by constructing a new building, but by creating a monument to a legendary cow.