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.

Tokyo is an energetic, bustling metropolis. But take a few steps off the main streets, and it reveals a different side to its character. This time on Japanology Plus, we explore the backstreets and alleys of Japan's capital city. Satoshi Okamoto shows us secrets and shortcuts in Ginza. Akiko Shiihara explains how alleys have turned Yanaka into an unexpected tourist hotspot. And Hidekichi Mizuno tells us how he started his alleyway business career -- by selling tangerines on the street.