Original sentence: is a member of the Japanese idol group Arashi, who is under the management of Johnny's Entertainment
Edited sentence: Since the group's debut in 1999, they have achieved 20 number one singles, 6 number one studio albums, 1 number one greatest hits compilation album and has sold 9.9 million records in Japan alone to date.is a member of the  popular Japanese idol group Arashi, who is under the management of Johnny's Entertainment