WIKIPEDIA:

“ , sometimes referred to as is a Japanese idol girl group, whose act generally revolves around singing and dancing to upbeat melodies. They are the lead group of Hello! Project, which is managed and produced by Tsunku, who composes nearly all the lyrics and melodies of their songs. Currently, they hold the record of having the second highest overall single sales (of a female group) on the Oricon charts.
The group's name can be translated as Good Morning Girls or Morning Girls. Morning Musume is known for its ever fluctuating line-up, with "graduations" and auditions held nearly every year. 2008 was the only year so far when no changes in the line-up occurred. Over the years, the group produced several splinter groups, and often worked with other Hello! Project acts, including Country Musume, Berryz Kobo, Melon Kinenbi, and v-u-den.
Since their expansion into the Chinese-speaking market in 2007, the group officially adopted the name Jou An Sao Nu Jou (Zǎo Ān Shào Nǚ Zǔ, Traditional Chinese: , meaning, "good morning girl's group"). In recent years the group have been making a concerted attempt to break into new markets in Asia, Europe and the US, performing at EXPOs worldwide.

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