The women's 400 metre individual medley competition at the 2002 Pan Pacific Swimming Championships took place on August 24 at the Yokohama International Swimming Pool.

[1][2] The last champion was Joanne Malar of Canada.

[3] This race consisted of eight lengths of the pool.

The first two lengths were swum using the butterfly stroke, the second pair with the backstroke, the third pair of lengths in breaststroke, and the final two were freestyle.

[4] Prior to this competition, the existing world and Pan Pacific records were as follows: All times are in minutes and seconds.