You can safely sleep.
In Japan, popular night Express train Sunrise, plying between Tokyo, Takamatsu, and Izumo.
A trip on this train, prefer air travel, and all because here you can get some sleep. So-called cars Zaseki (nobi nobi) have a single section, divided poluprovodnikami and carpeted.
Here you can sit or even lie down, and to fit virtually all (length of each section 220 antimirov). The result is something between a capsule hotel Asian and European couch.
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