Already know the conclusion

The wooden box is filled with the angry spirits of Japanese passengers who when attempting to fly to Tokyo where forced in the box and shoved under the nearest seat. When they finally learn that the Asian air hostess is Korean the Japanse passengers decide to tear through the plane looking for the Japanese director Takashi Shimizu to ask him
"日本の人々 ど!" or [IMDB Message boards also don't accept Japanse characters I sense a theme..]
"why did you not cast any Japanese people? ne!"