Yoshiki Hayashi (Japanese: 林 佳樹, Hepburn: Hayashi Yoshiki, born November 20, 1965), known as Yoshiki[5], is a Japanese musician, songwriter, composer and record producer. He is best known as the leader and a co-founder of the visual kei rock bands X Japan and the Last Rockstars, for which he is the drummer, pianist, and main songwriter.[6] He has been described by Billboard as a "musical innovator"[7] and named "one of the most influential composers in Japanese history" by Consequence.[8] Yoshiki's solo career includes several classical studio albums and collaborations with artists such as George Martin, Bono, will.i.am, St. Vincent, The Chainsmokers, Skrillex, Stan Lee, Roger Taylor and Brian May of Queen, Gene Simmons and KISS, Nicole Scherzinger, and Sarah Brightman.

In 1999, at the request of the Japanese royal family, he composed and performed a classical song at a celebration in honor of the tenth anniversary of Emperor Akihito's enthronement. Yoshiki also composed the theme for the 69th Golden Globe Awards[9][10] as well as for several anime and film soundtracks including Attack on Titan and Saw IV. In 2023, he made his directorial debut with the feature documentary film Yoshiki: Under the Sky and was selected as the first Japanese artist to be honored with a hand and footprint ceremony at the Chinese Theatre in Hollywood.