- Hikaru Utada likes to try yoga, Pilates, or soaks in the bath to overcome mental blocks she might encounter while working on her projects.
- Her single, "Boku wa Kuma" (I'm a Bear) was her first children's song. It was used extensively for the radio and TV children's music program Minna no Uta from October 2006 - January 2007.
- According to a Time magazine article in 2001, Hikaru Utada mentioned she would like to retire young, around 28 years old, and study neuroscience.
- In Fall 2000, Hikaru Utada enrolled at Columbia University in New York City. But after her freshman year, she went on hiatus to pursue her music career, since her first album in Japan had taken off.
- Hikaru Utada performs with Ne-Yo on a single called "Do You" that was released on November 21, 2007 in Japan. She got this opportunity thanks to a recommendation from Jay Z, and this would be her first duet with a guy.
- Utada frequently plays Tetris. On August 12, 2006, she challenged 30 different players in a one-on-one Nintendo DS Tetris Challenge where she won 26-4, but later battled some masters of the game. She also participates in Nintendo DS commercials where she shows off the product to some of her songs.
- Utada was married once to film director Kazuaki Kiriya. They married on September 7, 2002. Kiriya directed several of Utada's music videos including: Final Distance, Traveling, Hikari, Sakura Drops, Deep River, You Make Me Want to Be a Man, Be My Last, and Passion. She also composed and sang "Dareka no Negai ga Kanau Koro", which was the theme song on Kiriya's film, Casshern. On March 2, 2007, they had divorced, but they still support each other's music and media projects.
- Utada's fourth Japanese album, Ultra Blue, released in Japan on June 14, 2006. It includes the songs Colors, Keep Trying, and Passion, the last of which was the theme song for Kingdom Hearts II.
On this album, Utada wrote and arranged all the songs except for Colors which she shares arrangement credit with Kawano Kei. She even does the lead for the keyboards and programming.
- Utada's concert video, Utada Hikaru in Boudokan 2004, includes her hit song Hikari and several songs from her Deep River album.
- Hikaru's first live concert tour was Bohemian Summer 2000.
- The English theme song Simple and Clean for the console game Kingdom Hearts, was based mainly off of her single, Hikari, and a little bit of Uso Mitai na I love you.
- Hikaru Utada performs the theme song for the console game Kingdom Hearts II. She wrote Sanctuary, which is in English, and then did Passion, which is the same song translated to Japanese.
- Hikaru's song, "Can You Keep a Secret" was part of International Week.
- Kiriya Kazuaki directed some of Hikaru's music videos. They were "Final Distance", "Traveling", "Hikari", "Sakura Drops", "Deep River", "Dareka no Negai ga Kanau Koro", "You Make Me Want to Be a Man", "Be My Last", and "Passion".
- Her song "First Love" is the theme song to "Majo no joken".
- She had surgery to remove a benign tumor from her ovary.
- Utada's profile
Height: 158cm (5'2")
Hair: Black / sometimes Brown
Eyes: Black
Blood type: A
- Hikaru is a spokesperson for NTT DoCoMo mobile phones.
- Hikaru likes to read books.
