In the west, she is best known for her songs "Hatsukoi" (はつ恋), which was featured in a Nintendo commercial for the Game Boy Advance and the video game Super Mario Advance 4: Super Mario Bros. 3,[1][2] and "Poltergeist" (ポルターガイスト, Porutāgaisuto), which was used as the opening theme song of the anime Ghost Hound.
[5] At the age of 18, she wrote her first song, "Manatsu no Umi" (真夏の海), and the demo tape was noticed by a record company.
The original commercial was on air from 2001 to 2002 with the Super Mario Advance 4 variant being one of the first times non-Japanese people were exposed to her music.
[8] On the same day, the limited edition commemorative album compilation La saison de Cécile 1995–1999 (セシルの季節, Seshiru no Kisetsu) was also released.
It includes her three first albums, also called the Cécile trilogy, in new remastered UHQCD format with previously unreleased demos, instrumentals and alternate takes/mixes.