Sometimes on the ticket it is not clearly mentioned whether the flight supports Wi-Fi. Is it safe to turn on the Wi-Fi on electronic devices whilst on board to see if the flight supports it?
Do the Shinkansen trains have wifi? How about electrical plugs? If it depends on the train, these are the ones I'll be taking: Hikari 546 (Hiroshima->Shin-Kobe) Hikari 470 (Shin-Kobe->Tokyo) Max ...