I'm going to miss: trains

-they are everywhere, (even if they are slow)
-they can go incredibly fast, as long as you don't mind paying for it
-looking outside the window on a route I always take and seeing something new
-groups of high school students, full of awkwardness, checking each other out
-the different "the train is arriving" songs with different train lines (the best being the Hanshin Railway's "I've been working on the railroad" tune)
-the old man who I see semi-regularly, who smiles at me and I smile at him
-checking out the other foreigners on the train and wondering who they are and what they are doing in your corner of Japan