In 1988, his original band Maps had evolved into the band Humming Bird for which Fukuyama is often remembered. Humming Bird played a blend of rock and folk with roots in the hard rock and roll of the 1960s to 1980s, such as Queen or The Beatles. Initially, Humming Bird had only two official members: Yoshiki Fukuyama on guitar and vocals and Toshiyuki Furuya on bass and vocals. The final band roster was set in 1992 with the official addition of Shoichiro Aso on drums. Humming Bird enjoyed moderate success, having released nine albums before disbanding in May 2000.
Yoshiki Fukuyama was the singing voice and guitarist for the main character Basara Nekki in the anime Macross 7. Fukuyama, Chie Kajiura, Tomo Sakurai, and various studio musicians recorded several albums of songs that were used in the show. Most of the time, the work was merely credited to Fire Bomber, although Fukuyama's name does appear in the songwriting credits of several songs. Also he and his band, Humming Bird, are both listed in the “Thank You” section of all the Fire Bomber album credits.
In 2009, for the 15th anniversary of Macross 7, Fire Bomber released a studio album entitled Re.Fire". The album peaked at 16th on the Oricon 300 and stayed on that chart for a total of 7 weeks. In early 2011, Fukuyama announced he was recording a new studio album, and released Synapse on April 6 of that year.
Following a Macross 25th anniversary concert, Fukuyama and actor Nobutoshi Kanna joined forces to perform a number of concerts together. Since the production of Macross 7, the two men had worked together portraying the character, Basara Nekki. Kanna acted and Fukuyama sang and played guitar. They had considered the name Basaras for their duo, but decided instead on Fukujin which was created by combining the first kanji of their respective surnames. From time to time, as their busy careers permit, they sing together onstage and create a series of internet radio broadcasts called Fukujin Tsuke. On November 23, 2008, Fukujin performed its first international concert in Taipei, Taiwan.