In general trains stop in more central locations than airports, which usually get sited far away from people who might complain about the noise. And if you set up the system to do so, trains can stop multiple times within a metropolitan area for easier access. Tokaido Shinkansen trains call at Tokyo, Shingawa, and Shin-Yokohama; the ICE stops at Berlin Ostkreuz, Hbf and Spandau going west, or Gesundbrunnen, Hbf and Sudkreuz going south.