Hey! Say! JUMP

'''Hey! Say! JUMP''' is a nine-member Japanese all-male band under the Japanese talent agency, Johnny & Associates. The name '''Hey! Say! refers to the fact that all the members were born in the Heisei period, and JUMP is an acronym for Johnny's Ultra Music P'''ower. The sub-groups consists of the five oldest members (BEST) and four youngest members (7) respectively. The average age of the group at the debut was 15.7, with the youngest member being 13 and the oldest 17. The group debuted in 2007 with ten members, becoming the largest group to debut in Johnny's history. In 2011, Morimoto was indefinitely suspended from the group for a scandal. This caused the band to go from ten members to nine.

History
During a KAT-TUN spring concert on April 3, 2007, Takaki Yūya, Arioka Daiki, Yamada Ryōsuke, Yamada Ryōsuke and Chinen Yūri were announced to be part of a temporary group called Hey! Say! 7. The name came from the fact that all the members were born in the Heisei period and from the year the group was formed was in 2007.

On September 24, 2007, the five members of Hey! Say! 7 were joined by Johnny's Jr's, Yabu Kota, Inoo Kei, Yaotome Hikaru, Okamoto Keito and past member Morimoto Ryūtarō. The ten-member group was split into two sub-groups of five based on age: Hey! Say! BEST (older members) and Hey! Say! 7 (younger members).

It was also, announced, that they would make their CD debut on November 14, 2007 with "Ultra Music Power", which was used as Japan's Volleyball World Cup Relay 2007 theme song.

The group was surrounded by much controversy on June 28, 2011 after the photos of Ryutaro smoking underage were leaked. When he was asked about the photos, he said "it was alright," that it was, "no big deal". The following day, in response to the scandal, Johnny's Entertainment issued a statement of apology and planned to suspend Morimoto from all of his activities indefinitely. Following the removal of Morimoto's profile from the official Johnny & Associates website, Johnny Kitagawa himself made an official announcement on the issue. He stated that Morimoto now has ambitions to focus on studying and denied any possibility of him returning.