Sunrise Izumo and Seto are sleeper limited express connecting from Tokyo to Izumoshi and Takamatsu.
Two trains are coupled from Tokyo to Okayama and operate as one train.
There was no real voice announcement by conductor after departure from Tokyo and after departure from Yokohama.
I recorded it from a few minutes before departure from Tokyo until in-train announcement after departure.
It is recorded at near the deck for you can easily hear the sound of the platform and the seam sound.