The women's 400 metre freestyle competition at the 2010 Pan Pacific Swimming Championships took place on August 20 at the William Woollett Jr. Aquatics Center.[1][2][3] The last champion was Ai Shibata of Japan.[4][5]
This race consisted of eight lengths of the pool, with all eight being in the freestyle stroke.[6]
Prior to this competition, the existing world and Pan Pacific records were as follows:
All times are in minutes and seconds.
The first round was held on August 20, at 10:00.[1]
The B final was held on August 20, at 18:05.[2]
The A final was held on August 20, at 18:05.[2]
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