Namaze To Takedao Abandoned Fukuchiyama Railway Line Walk
The hike starts 10mins walk from Namaze Station in Nishinomiya along the Muko river and takes you through an old tunnel and over a rail bridge; ending at Takedao Station.
More information about the hike in Japanese: https://nishinomiya-kanko.jp/fukuchiyamasen_haisenjiki2019/ (includes a PDF map, also in Japanese)
Information in English: https://travel.gaijinpot.com/takedao-train-tracks-trail/
A Google Maps pin point of where the hike starts: https://goo.gl/maps/qAr3Gyq5W6CT658N8