Chromecast is a Google device with which you will be able to view all the HD content of Rakuten TV on your television, even if it is not a Smart TV.
Using Chromecast is very simple. Just connect it to your television through the HDMI connector and configure it through the device from which you want to send the image. You can play on your TV screen all the content you are viewing in the Rakuten TV application for iOS and Android.
Chromecast must be plugged into a power outlet or the TV itself via USB. Also must be connected to the network wirelessly via WiFi.