Retaining the stage name, Double released her first solo single, "U", which came in at #29 and had a video produced by Brian Alexander Morgan (Usher, Mariah Carey).
[9] In 2004 Double completed a personal ambition to record a Jazz album, titled "Life is Beautiful" in which she teamed up with leading Japanese producers m-flo.
In 2007 for her album "Reflex", Double teamed up with US Hip-Hop trio De La Soul for "Say I Gotta Believe," and with American rapper Ak'Sent for "We International."
She has confessed to being nervous about performing live due to being a perfectionist that can't undo things on stage, thus preferring the studio.
[12] The album featured a new song, "Black Diamond", with the "Queen of Hip-Pop" Namie Amuro and the two performed the track at the finale of Double's 2008 live tour at Tokyo's Studio Coast, whilst also appearing together at the 2008 MTV Video Music Awards Japan.
[1] In 2024, the track "Strange Things" from her 2002 album "Vision" has gone viral on social media, gaining attention in western countries like the USA, Canada, and Brazil.