"Whistle" (ホイッスル, Hoissuru) is the 13th single by Japanese singer Hiroko Moriguchi.

Written by Moriguchi, Yui Nishiwaki and Kaori Okui, the single was released on June 9, 1993 under King Records.

The song was selected as the theme song of the 1993 edition of the Fuji TV variety show Yume ga Mori Mori.

Moriguchi performed the song on the 44th Kōhaku Uta Gassen that year.

[4] All music is composed and arranged by Kaori Okui.