Speaking of Wi-Fi
In Narita (Tokyo) wi-fi is free. All you need to do is click on the Agree button.
In Hong Kong International wi-fi is free. No registration is required.
In Taipei International (Taiwan) wi-fi is free. No registration is required.
In Changi (Singapore) wi-fi is free. To get access, you need to ask for a login/password at an information desk in the airport. No registration is required.
In Beijing Capital International wi-fi is free. No registration is required.
In Hong Kong International wi-fi is free. No registration is required.
In Taipei International (Taiwan) wi-fi is free. No registration is required.
In Changi (Singapore) wi-fi is free. To get access, you need to ask for a login/password at an information desk in the airport. No registration is required.
In Beijing Capital International wi-fi is free. No registration is required.