Due to her older sister being in the modeling business, Ichikawa made several appearances in the fashion magazine Olive during her teens. She then became a model in 1994 under exclusive contract with the magazine. In 1998, she started modeling for other magazines such as CUTiE, spoon. and Zipper. She made her acting debut in the 1998 short filmHow To Jujutsu, directed by Takashi Homma. Among the most notable movies she has appeared in are Blue, Cutie Honey, Memories of Matsuko and Shin Godzilla. For her role in Blue she won the award for Best Actress at the 24th Moscow International Film Festival. She was given a Best New Talent award at the 2003 Yokohama Film Festival.