Bump of Chicken is a Japanese rock music group. The members are four men. All members in this group were born in 1979. The vocalist of the group is Fujiwara Motoo. The bassist of the group is Naoi Yoshifumi. The guitarist of the group is Masukawa Hiroaki. The drummer of the group is Masu Hideo. They have been friends since they started school at a young age. The voice of Fujiwara Motoo and the words of their music, which he writes, are popular. They released the debut album “FLAME VEIN” in 1999.