[5] Ichikawa debuted in the entertainment industry under Stardust Promotion in 2005, as a member of the idol group "Power Age".
[8] Only days later, in the midst of “‘Minogashita Kimitachi e’ 〜AKB48 Group Performances〜” in Tokyo Dome City Hall on June 6th, the formation of Team 4 was announced alongside their first performance, a revival of Himawarigumi’s first stage, “Boku no Taiyou”—with Ichikawa being amongst the ten founding members.
in Saitama Super Arena”, it was announced that Ichikawa would switch agencies from AKS to Production Ogi.
", and in the following month, she ranked number 58 in the 27th Single's General Election, landing a position in Future Girls with 5,963 votes.
[13] She began her activities under the newly reformed Team B on November 1, and performed as part of the starting lineup for their waiting stage on the 3rd.