AKB48 (read "A.K.B. Forty-eight") is a Japanese idolgirl group. As of November 2013[update], the group has 89 members. The girls range in age from early teens to mid-20s. Produced by Yasushi Akimoto, it is one of the highest-earning musical acts in the world, with 2012 record sales of over US$226 million in Japan. It has achieved such popularity in Japan that it has been characterized as a social phenomenon.
As of January 2013, the group's eighteen latest singles topped the Oricon Weekly Singles Chart. In 2010, "Beginner" and "Heavy Rotation" placed, respectively, first and second in the list of Japan's best selling singles for that year. In 2011 and 2012, AKB48's singles occupied the top five spots of the Oricon Yearly Singles Chart. As of December 2013[update], the group has sold over 25.83 million singles, and it holds the record for most singles sold in Japan by a female group with its 2013 single "Sayonara Crawl", which sold for more than 1.87 million copies.
AKB48 is named after Akihabara (Akiba for short), the area in Tokyo where the group's theater is located. The idea of AKB48's producer Yasushi Akimoto was to create a girl group that, unlike a regular pop group, which gives occasional concerts and that is mostly seen on TV, would have its own theater and perform there on a daily basis; the fans would always be able to go and see the girls live. AKB48 still performs at the theater daily, with tickets distributed by lottery. Akimoto has also expanded the AKB48 concept to several sister groups throughout Japan, and all over Asia.
Set List: Greatest Songs 2006–2007(SET LIST～グレイテストソングス 2006-2007～?) is the first studio album by AKB48, released on January 1, 2008. It was re-released on July 14, 2010 as Set List: Greatest Songs Kanzenban(SET LIST～グレイテストソングス～完全盤,Complete Edition?) with four new tracks: the singles "Romance, Irane" and Sakura no Hanabiratachi 2008," along with brand new songs "Seventeen" and "Anata ga Ite Kureta Kara" (あなたがいてくれたから,Because You Were With Me?).
AKB48 has released six albums before releasing this album, but those were just a collection of songs each team sang at the AKB48 theater. They are also known as stage albums. This is the first album that they have released as a group. There are 33 tracks in total. However, songs are only recorded up to the 13th track; the rest is 20 members who were chosen to say, "Aitakatta" (wanted to meet you).
Limited edition cover is the back view of Team K member, Megumi Ohori. The first pressing of the Kanzenban edition comes in a cardboard silp cover with a random member photo and a appication card.
"River" is the 14th major single by the Japanese idol group AKB48, released on October 21, 2009. It was the first AKB48's single to top the Oricon weekly singles chart, having sold 179,000 copies in its first week. Thus it became the group's best selling single, beating "Namida Surprise!", which by then had sold 144,000 copies in 18 weeks. The music video was filmed at Iruma Air Base.