Kanon Fukuda joined Hello! Project as a member of Hello! Pro Eggin June 2004 when she passed the auditions alongside thirty-two other girls. The aim of the group was to prepare the young girls for their debut into the world of entertainment, as such Fukuda recieved free dance and vocal training alongside the other Eggs. In November, Fukuda recieved a role in a musical as "Henrika" in "34 choome no kiseki" The musical ran from November to December. 2006, Fukuda continued her training and performed as a backing dancer along with the other Eggs during concerts.
Fukuda worked on the Niseen Hikosen Project 2006 campaign single "Sora ga Aru" with three other Hello! Pro Kenshuuseimembers. She performed in three musicals in 2007, playing "Mao" in "Chitose zuki" in March, performing "Saien!! Chitose zuki" in August and "Heisei Revolution ~Bakku tuze - Byakkotai~" in October.
Fukuda also took part in television, "Chao.TV" (started 2007/09/02). Fukuda had another role in a musical , that being "Bijogi Junction" in April, but a bigger opportunity for Fukuda presented itself when she was selected to be one of the four members for a new Hello! Pro Egg unit alongside Maeda Yuuka, Wada Ayaka and Saho Akari. The group was called Shugo Chara Egg! and was formed to record the opening songs for the anime that Buono! sings for, Shugo Chara!. They released two singles before she graduated from Shugo Chara Egg! along with Maeda and Wada.
On April 4th, 2009 Tsunku announced on his blog that a new group was in the works. The members listed were Kanon Fukuda, Yuuka Maeda, Saki Ogawa, and Ayaka Wada. He stated the lineup was subject to change, and that it would be their "major debut". On May 5th, 2009 Tsunku revealed the name of the new group to be "S/mileage" on his blog. They will graduate from Hello! Pro Egg in the Hello!Project spring concert in 2010. Also in 2009 Fukuda was cast in a film with Yajima Maimi of °C-ute, titled "Fuyu no Kaidan". She and the original members of Shugo Chara Egg! were in Shugo Chara the Musical!. She played "Nadeshiko Fujisaki".
In May the members of S/mileage graduated from Kenshuusei status and became full members of Hello! Project.
Fukuda, along with Ayaka Wada and Yuuka Maeda, formed Lilpri for the anime Hime Chen! Otogi Chikku Idol Lilpri. The girls voice the main characters and sing both the opening and endings for the anime. Fukuda voices Natsuki Sasahara.
As of 2011, Fukuda is the leader of Shin Minimoni.