Ichiki began her career as a voice actress in the early 2000s, landing small roles in anime series and video games. Her breakthrough role came in 2004 when she voiced the character of Shana in the anime series "Shakugan no Shana." The series' success helped Ichiki gain recognition, and she went on to appear in more prominent roles in anime series such as "Witchblade," "Kaze no Stigma," and "The Tower of Druaga."