Overview: Tokyo was once known as the "city of water," but many of its rivers and waterways are now hidden from view. This time on Japanology Plus, we look at water in Japan's capital from various angles. Master brewer Shunichi Saito explains how tap water is used to make excellent sake. Tour guide Masahiro Inagaki takes us on a river cruise. And pleasure boat operator Ken Ito explains how land reclamation changed the face of water-based industries in the Tokyo Bay.