The slopes of the gods! What could this be? Well, it’s mainly just a company, known as Hanshin. They’re based in the area between Osaka and Kobe. Think of it this way: 大坂 + 神戸 = 阪神! They’re everywhere, though, and even have a baseball team (the Hanshin Tigers), so it’s good to know.
This threw me off when I read it, because I thought Osaka was spelled 大阪. But it looks like that’s indeed the case!
History lesson! Osaka was originally spelt 大坂, until the Meiji Restoration, when supporters of the Meiji Emperor noticed that when separated into its components, the 坂 becomes 士反, which can be read as “Samurai rebellion”. In order to… I dunno, discourage any rebelling samurai, I guess? … they changed it to the 大阪 we know and love today.