Here you can find some tips before installing ETC onboard unit onto your car, and start using to pay tolls.
The following articles are directly hyperlinked to the ETC Portal Site.
ETC know-hows from very start to the setup of onboard unit
For those who intend to install ETC onboard unit on your cars.
How To Use
Want more explanation before start using ETC?
For those who have already installed onboard units.
Here are important precautions in using ETC.