Complex sentence: At the time, Shibuya was an epicenter for Tokyo fashion, nightlife, and youth culture with a cluster of record shops like Tower Records and HMV, which housed a selection of imports, as well as fashionable record boutiques.
Split into simpler sentences: At the time, the locale was an epicenter for Tokyo fashion, nightlife, and youth culture. The district contained a cluster of record shops like Tower Records and HMV, which housed a selection of imports, as well as fashionable record boutiques.