Kobe is a shopper's paradise. Unlike shops in Tokyo, Osaka, and other places in Japan, which are scattered all over the city, most of the shopping districts in Kobe are in clusters, so you can cover a lot of ground with ease.
Piazza Kobe and Motoko Town are two names for one long shopping district full of used goods running under the JR train tracks from San-no-miya to Moto-machi.