How Long Is a Madrid to Tokyo Flights Duration?

Travel

Source: How Long Is a Madrid to Tokyo Flights Duration?

I am planning a trip and would also like to inquire regarding the duration of the Madrid Tokyo Direct Flight. Does the flight truly remain non-stop all the way? Some sources have mentioned that one should inquire regarding the flight details with Flighys. Has anyone taken the same flight recently? Just how smooth was the flight, and were there any hints on how to endure the long non-stop flight?