Keep your eyes peeled at Kuroshio Market — you're likely to discover some unique curio among the stalls here. After you've had a good look at the wares, grab something to eat from one of the food vendors.
You'll find this community marketplace in Wakayama. Once you've seen everything you want to at Kuroshio Market, have a look at nearby Wakayama Castle, Kimiiji Temple, and Marina City Sea Fishing Park.