Catch the train to JR Takarazuka Station from JR Osaka. Or take Hankyu line to Takarazuka Station, Hankyu.
Takarazuka Revue (宝塚歌劇団 takarazuka kagekidan)The most famous and popular attraction in the city, this theater features all-female casts. The most famous actresses are the women who play males roles (男役 otoko-yaku), and it is for them that the theater is so popular. They make it quite easy to get lost in the story, forgetting that the none of the men on stage are actually men. 
Tezuka Osamu Manga Museum (手塚治虫記念館 tezuka osamu kinenkan)This museum features the works of the famous mana artist, Tezuka Osamu, often nicknamed the "Father of Anime", with works such as Astro Boy and Kimba the White Lion being some of his most famous. The museum features information about his works, screenings, artwork, and information about the personal life of Tezuka Osamu. 
Start of the abandoned railway hike
First tunnel of the abandoned railway hike. Get your flashlight ready!!
Cross the bridge over the rapids on the abandoned railway hike
Hike along the old abandoned railway. Catch the train to JR Takedao Station from JR Osaka. (roughly 40 minutes). The walk is about 6 kilometers long and is flat. Difficulty level = 2/5. It takes about 2 hours. Key features: spectacular river views, rapids, gorge, cherry blossoms, red and yellow leaves in Autumn, train tunnels. Great for photography. When you exit the train station turn left and follow the river along and around to some steps up onto a small bridge. Cross the bridge and you will come to the old train track sleepers. Follow them along the river. You will have to walk through 6 old train tunnels and that is what makes this hike so interesting. Make sure you bring good hiking shoes and a flashlight. You cannot walk through the tunnels without a flashlight. There are also nice places next to the river for a picnic. When you get to the end, walk towards the massive overpass and keep walking about 1km. Eventually you will come upon some T-intersections, turn right up the hill at the second traffic light towards Namaze station. Have fun.