Morning Musume (モーニング娘) also called Momusu (モー娘) for short is a Japanese idol girl group managed and produced by Tsunku. The groups name basically means Morning Girls and they are part of the Hello! Project stable. The group has gone through many line-up changes since first formed in 1997. It seems that every year there are new graduations from the group and new auditions bring in new members that it can be hard keeping track of the line-up.
The current line-up includes 9 members and this single is the groups 47th single.
Morning Musume generasia website
Watch the music video for the single Kono Chikyu no Heiwa wo Honki de Negatterundayo! by Morning Musume