Your Best Friend

"Your Best Friend" is a song by Japanese singer-songwriter Mai Kuraki, released on October 19, 2011 as her 37th single. It was the 40th ending theme for Meitantei Conan, known in English as Case Closed, the television anime produced by TMS Entertainment.

The song was written by Mai Kuraki, GIORGIO 13, and SHIKATA, and Daiko Nagato produced the single. "Your Best Friend" later appeared on Kuraki's album Over the Rainbow, and the release reached number 10 on Oricon's weekly singles chart and number 19 on the Billboard Japan Hot 100.