I first thought to myself “the name of the Shinkalion is Doctor Yellow?” I don’t know much about Shinkansen, but I actually learned it’s a real train. That’s actually really cool.
All Shinkalion Shinkansen are based on real Shinkansen, with H5 Hayabusa (Piloted by Miku, crossing over from VOCALOID) and Black Shinkalion being based on the E5 Hayabusa and 500 TYPE EVA (Crossing over from Neon Genesis Evagalion (forgive me for butchering that)) being based on the 500 Kodama.