Ikimono Gakari's best album "Ikimono Bakari ~Members BEST Selection~" was released last week, and it has already sold 457,000 copies, more than doubling the first-week sales of their last album. That amount sets this year's current first-week sales record for an artist with female vocals, surpassing AKB48's "Kamikyokutachi" (295,000). Even including male artists, they are in second place behind Arashi's "Boku no Miteiru Fuukei" (731,000).
Ikimono Gakari formed in 1999 but did not make their major label debut until 2006. They achieved their first number-one album with their 2008 release "My song Your song." With this, they now have three consecutive number-ones (two original albums and one best album). The last mixed male/female group to achieve that was HY in 2006.