What japanese movie is this?

Question

Ok this has been bugging me for a while now. Theres a Japanese animated movie that i saw a few years ago.

Its about a mysterious tower that no one knows much about that seems to reach endlessly upward into the sky. Two boys dream of building a plane to reach the top. They make a promise to a girl, to let her fly with them when they are finished building. However, she becomes comatose and ends up staying unconscious for years. It ends with the boys waking her up by destroying the tower itself with a kind of missile fired from their completed plane.

Anyone know what the movie is called?

Answer 1

"The Place Promised in Our Early Days" (2004).
http://en.wikipedia.org/wiki/The_Place_Promised_in_Our_Early_Days

Answer 2

Pearl Harbor 2: The Next Generation