This Is the One is the third English studio album by Japanese American pop singer-songwriter Utada, released by Island Records in the United States digitally on March 24, 2009 and physically on May 12, 2009. The album was originally set to be released in Japan on March 4 but was pushed back to March 14. The album was only released in North America, Japan and some parts of Asia. In Japan, the album topped the Oricon's International Album chart and peaked at number three on the Weekly chart. In the United States, the album peaked at number 69 on the Billboard 200 chart. This Is the One was the supporting album of Utada's 2010 tour Utada: In The Flesh 2010. On December 21, 2009, the Dirty Desire remixes were released.

This Is the One marked Utada's last album with Island Records, and the Universal Music Group as a whole, not only due to the end of her contract, but also due to her 2010 global recording contract with EMI Music. All albums, regardless of language, will be released under "Hikaru Utada", thus also retiring her Western stage name, Utada.

On October 23, 2007, Utada wrote a message on her Japanese blog stating that she was writing and recording demos for her next English album while simultaneously completing her fifth Japanese studio album. During her interview with Ningin on February 3, 2009, Utada states that she wanted to make a mainstream album, and the result was a more R&B influenced album because that's what currently is mainstream. In an interview with Kiwibox on February 20, 2009, Utada explains that the title of the album came about because she was going for a more mainstream sound for this record, and that it would be the "breakout" album.

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