Ultra Blue
2006 studio album by Hikaru Utada
Ultra Blue (stylized in all caps) is the sixth studio album by Japanese-American singer Hikaru Utada, released on June 14, 2006, by Eastworld. It is their first original Japanese language album in four years, following Deep River (2002). Ultra Blue contains thirteen songs, including six singles released between 2003 and 2006. While the arrangements for Deep River were done collaboratively, all but one of the songs on Ultra Blue were written, composed, and arranged solely by Utada, who also did the programming. In this album, the R&B elements that have been present since their debut are further diminished, and the majority of the songs have an electronic flavor with an emphasis on synth sounds.
Ultra Blue received mostly positive reception from music critics. The album was a commercial success in Japan, selling over 500,000 copies in its first week and debuting at number one on the Oricon Albums Chart. By the end of the fiscal year, it became 2006's best-selling original album by a Japanese female soloist. It was also the fourth most downloaded album of the year on iTunes Japan, and was certified as a million-seller by the Recording Industry Association of Japan (RIAJ). During summer 2006, Utada held a nationwide concert tour to help support the album titled Utada United 2006.
This brief starts where responsible research should: with the source description of “Ultra Blue” as 2006 studio album by Hikaru Utada. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the arts & letters register because the source frames it as 2006 studio album by Hikaru Utada. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Object files, edition statements, performance records and contemporary criticism preserve different stages of the work’s history. The source revision retrieved here is dated May 13, 2026. The linked authority identifier is Q2702745. None of the 1 selected statements returned an explicit reference. The first chronological checks are 2006, 2002 and 2003.
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This entry incorporates text from “Ultra Blue” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.