Hakutsuru is a major sake brewer in 碍艒产别's Nada-gog艒 district, a major sake-brewing centre. The self-guided tour through the old wooden brewery (the current, modern brewery is behind it) is a fascinating look at traditional sake-making methods: videos (with English) show real footage from inside the original brewery alongside old equipment. You can sample some sake at the end.
Take a local Hanshin-line train eight stops east from Sannomiya to Sumiyoshi Station (楼190, 15 minutes). Exit the station, walk south towards the elevated highway and cross under it, then take your first left and then a right; the entrance is on the right. Use the blue-and-white crane logo atop the factory as your guide.