"Traveling" (stylized as "traveling") is a song recorded by Japanese–American recording artist Utada Hikaru. It was released as the second single from her fourth studio and third Japanese language album, Deep River (2002). The track was written and composed by Utada, whilst production was handled by Utada, her father Teruzane Utada, and long-time collaborator Akira Miyake. Musically, "Traveling" is a dance-pop song, influenced by house music. Lyrically, it discusses human activities and dreams.

The song received positive reviews from most music critics. Many selected it as one of Utada's best singles, and was complimented for its production and dance-oriented composition. It was also successful in Japan, peaking at number one on both the Oricon Singles Chart and Tokyo Broadcasting System's (TBS) Count Down TV singles chart. It was certified in two categories by the Recording Industry Association of Japan (RIAJ), and was the second best selling single of the year 2002. A music video was filmed for "Traveling" in 2001, featuring Utada as a hostess travelling on a spacecraft with passengers. It has been performed on some of Utada's tours, including Utada in Bokuhan (2004) and Utada United (2006).

"Traveling" was written and composed by Utada, whilst production was handled by Utada, her father Teruzane Utada, and long-time collaborator Akira Miyake. This was Utada's first original single to have been handled by Utada, her father, and Miyake since her single releases from her debut album First Love (1999); she had primarily worked with American producers, such as Rodney Jenkins, Jimmy Jam & Terry Lewis for her second studio album Distance (2001). The song included live instrumentation by Saito Mitsutaka, who played the bass guitar, and Tsunemi Kazuhide, who played synthesizers, while it was arranged by Utada and Kawano Kei. The song was recorded and mixed by Ugajin Masaaki and Matsui Atushi in 2001 at Bunkamura Studio, Shibuya, Tokyo. It was released as the second single from her fourth studio and third Japanese language album, Deep River (2002). Since then, the song has been remastered and re-released twice; the first on April 1, 2004, and the second time on December 9, 2014 for Utada's first greatest hits album Utada Hikaru Single Collection Vol. 1 (2003).

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