Even on a tight schedule, Asakusa earns the hours.
Allow Half day.
Beyond the temple it's the most 'old Tokyo' of the big tourist areas: low buildings, craft shops, rickshaws, kimono-clad visitors and Sumida River views toward Skytree. It leans heavily touristy and a bit theme-parky around the main streets, but step a couple of blocks out and it quiets fast.