Shiho Sakai
is a Japanese backstroke swimmer.

Major achievements
2009 Junior Pan Pacific Swimming Championships
 100m backstroke 1st (1:01.13)
 200m backstroke 2nd (2:12.00)

Personal bests
In long course
 50m backstroke: 27.88 (July 29, 2009)
 100m backstroke: 59.14 Asian Japanese Record (July 28, 2009)
 200m backstroke: 2:09.06 (August 28, 2008)

In short course
 50m backstroke: 26.42 (February 21, 2009)
 100m backstroke: 55.23 World record (November 15, 2009)
 200m backstroke: 2:00.18 Former world record (November 14, 2009)