"Rain" is the seventeenth single by Japanese pop singer-songwriter Yui. It was released on November 24, 2010. The title song is a tie-in for the Fuji TV drama series Perfect Report. The single reached number 2 on the Oricon chart.

The music video for "Rain" alternates between cuts of Yui and her band playing in the rain and Yui herself running through a rainy street towards a Christmas gift shop. Around the middle of the music video, a happier past is shown through flashbacks of Yui smiling and receiving earrings on a sunny day, along with the lines: "They try to bring back memories / Which is already lost / No matter what I do, I can't get rid of the past." The video eventually ends with an image of hope for the future, with the lyrics: "When someday this rain turns to snow / And slowly consumes this sadness / I'll be greeted by new hope.

All tracks written by Yui.

The single was certified gold by the RIAJ for having more than 100,000 copies shipped to stores.

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