"Kioku" (記憶^?, lit. "Memory", stylized as "La Mémoire" on the cover) is the twenty-fifth single by Japanese recording artist Misia. It was released on May 25, 2011 as the sole physical single from Misia's tenth studio album Soul Quest.

The song was written by Misia and Gorō Matsui, composed by Japan-based Korean producer BZ4U and produced by Shirō Sagisu. It was released nearly a year and a half since "Hoshi no Yō ni..." (2009) as the lead single from Misia's tenth studio album Soul Quest. "Kioku" served as theme song for the TV Asahi drama Iryū Sōsa (遺留捜査^?). The single includes two B-sides: "Kono Mama de Tonight," a duet with Hawaiian singer-songwriter John Paul "JP" Lam, and "Can't Take My Eyes Off of You," a cover of the 1967 Frankie Valli song. The first press edition of the single includes a bonus remix of "Maware Maware."

TV Asahi producer Yumiko Miwa chose "Kioku" as theme song for Iryu Sosa specifically because of the way it complemented the drama. In a press release, she commented:

I had always loved Misia's powerful and romantic voice. Because Iryu Sosa is a suspense drama, the episodes don't always have happy endings, so I wanted a song that would convey sympathy and hope. Misia took my thoughts into consideration and presented us with a beautiful song, I'm very grateful. "Kioku" is such a wonderful song that every time I listen to it I get goosebumps. Thank you so much.

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Wikipedia