A two-hour train ride from Kagoshima, the Nishi-Ōyama train station is surrounded by agricultural fields and a large volcano, Kaimondake, to the west. The station itself is little more than a slab of concrete with a roof and an obelisk proclaiming it as the southernmost Japan Railways station, but that doesn’t stop train enthusiasts from all over the world coming to see it. The diesel-powered trains that run through the station only come a handful of times per day and feel like a blast from the past. Just next to the…