From September to December they released a single each month plus a photobook and their very first album, Attack, in January 2006.With all the releases and promotional activities, the group did not have time to perform their songs live.Their 14th single "Kuchibiru Kara Romantica/That's Right" was tied-up with television drama serial Delicious Gakuin, which starred members Nishijima and Atae.
Initially, it included the five male members Takahiro Nishijima, Naoya Urata, Shuta Sueyoshi, Shinjiro Atae, Mitsuhiro Hidaka, and Misako Uno as the only female member.
Avex later decided to add two more female members, Yukari Goto then Chiaki Ito.
After a string of moderate hits throughout 2007-2008, AAA started a successful era in 2009 with their album Heartful and all of its preceding singles debuting in the top three.
For the first time ever, they were able to guest on the popular music program Music Station, to perform "Hide Away".
Nishijima received his first starring role in film, playing the lead character in Love Exposure, which released in January 2009.
His acting in the film was critically acclaimed, earning him the Sponichi Grand Prix New Face Award of the Year 2009 The group released their fourth album Dep Arture on 11 February 2009, and the album peaked at number four on the Oricon charts, the first time the group achieved a place within the top five for a studio album.However, as each of the singles tackled different genres, they did relatively well on the charts.In June 2006, AAA's official fan club "AAA Party" opened its doors.In April 2005, Avex officially announced the debut of the group with seven members (excluding Ito), and oldest member Urata as the leader.AAA officially started their activities as a group in May. AAA debuted on 14 September that year with "Blood on Fire" and were received well due to the song being used as the theme song of the live action Initial-D movie.The single sold well and was certified Gold by the Recording Industry Association of Japan (RIAJ) for the shipment of 100,000 physical singles and 100,000 full-track ringtone music downloads each, making it their most successful single to date.