Not a vlog, no intrusive faces or voices, pure Japan only.
Tokyo station underground passageways are huge and connecting not only neighbor buildings, but even several neighbor stations. More over they connect two neighbor cities Chuo and Chiyoda.
In this walk you can see how to pass from Higashi Ginza station to Otemachi station through Ginza, Hibiya and Tokyo stations with total distance of 3km if not counting going in wrong direction twice.

Tokyo station location and walking route https://drive.google.com/open?id=1bHW...

Filmed in UltraHD 4K with Lumix GH4 camera and BeholderDS1 stabilizer. Feel free to correct my English or suggest a video to film.