Masaki Aiba

Aiba was born in Hanamigawa, Chiba as the first child of his family. He has a younger brother who is four years younger. Aiba was raised by his grandparents until he was four years old because his parents were busy running their newly opened Chinese cuisine restaurant then.

Prior to joining Johnny & Associates, Aiba watched a program called Love Love SMAP (愛ラブSMAP, Ai Rabu SMAP) and saw SMAP playing basketball on television. Wanting to play basketball with them, he sent in the application to join the talent agency 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 collaboration with the other members, he has written the lyrics to "Fight Song" and "5x10". For his solo song "Hello Goodbye", Aiba played the harmonica portion of the song throughout Arashi's Arashi Marks 2008 Dream-A-Live and Arashi Marks Arashi Around Asia 2008 concert tours. Aiba also used to play the saxophone; however, due to the collapse of one of his lungs in 2002, he was forced to stop playing due to the operation he had to undergo.