Whatever the religion or whoever they're dedicated to, shrines have a way of making you reflect. Visit Motosumiyoshi Shrine and share a silent moment with the locals.
You'll be spoiled for sightseeing choice in Higashinada. Motosumiyoshi Shrine is a great place to begin here, but there are loads of other worthwhile places to visit. Arima Hot Springs, Hanshin Koshien Stadium, and Kidzania Koshien Theme Park are not far from the sacred place and will fill in your day nicely.