曲谱简介：

Hikari Hikari is Hikaru Utadas 10th Japanese-language single (12th overall), and is also her 3rd single on the Deep River album. Its release date was March 20, 2002. It is best known as the main theme song for the Japanese release of the Square (now Square Enix) and Disney Interactive Studios video games Kingdom Hearts, Kingdom Hearts: Chain of Memories, Kingdom Hearts Birth by Sleep, and Kingdom Hearts Re:coded. Utada was the only singer thatTetsuya Nomura, the director of Kingdom Hearts, had in mind for the Kingdom Hearts theme song. This also marked the first time Utada had produced a song for a video game. The English-language version of the song, titled "Simple and Clean", was used in the English and Final Mix releases ofKingdom Hearts, Kingdom Hearts Birth by Sleep and Kingdom Hearts Re:coded. And Hikari was performed during Utadas two date concert series Wild Life in December 2010.