Masaki Aiba (?? ??, Aiba Masaki?, born December 24, 1982) is a Japanese idol, actor, singer, television personality and radio host. Along with Jun Matsumoto, Kazunari Ninomiya, Satoshi Ohno, and Sho Sakurai, Aiba is a member of the Japanese boy band Arashi, who is under the management of Johnny & Associates.

Biography
Born in Chiba, Japan, Aiba is the oldest son of his parents. He has a younger brother that he constantly fought with during their childhood years. One day, Aiba saw a program called I love SMAP on television and saw his future seniors SMAP playing basketball. Since he wanted to play basketball with them, he sent in the application to join Johnny & Associates himself, without exactly knowing what the agency specialized in until the day of auditions. Aiba became a Johnny's Jr. in August 1996 at the age of 13.

In 2002, Aiba was hospitalized after fainting due to a collapse of one of his lungs and was forced to stop playing the saxophone due to the operation he had to undergo.

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