I thought that I should pick up on this because it was dismissed by some of the editors when it is, in fact, a valid comment (though I have no idea what "Nihongon" is...).
Our wiki page for End of Evangelion reads as if "新世紀エヴァンゲリオン劇場版 THE END OF EVANGELION" is the primary Japanese title. However, as Username points out, in Japan the DVD uses the name "Air/まごころを、君に", and the Japanese wikipedia page for EOE is named "新世紀エヴァンゲリオン劇場版 Air/まごころを、君に". So even if "The End of Evangelion" is a co-equal title for the film, and even if it is given in the film itself and on the movie poster, it seems that most official material in Japan prefers "Air / magokoro o, kimi ni". It would be nice if the wiki page could make this clear.
Edit: The wayback machine, going back to Japan in 1997, gives the official film title as the following monstrosity:
THE END OF EVANGELION 新世紀エヴァンゲリオン劇場版 Air/まごころを、君に