[5] Ichii's debut in MMA was on November 29, 2006 (2006-11-29) at Smackgirl 2006: Legend of Extreme Women, where she was defeated via unanimous decision by Emi Fujino.

[6][7] More than a year later, on her next match, Ichii defeated Yukiko Seki by TKO (punches) to win the Universal Kickboxing Federation (UKF) Women's MMA Intercontinental Title on January 19, 2008 (2008-01-19) at Square Jungle's event Strong Soldiers' Conquest.

[28][29] Ichii debuted in kickboxing on March 9, 2007 (2007-03-09) at Kakidamishi 8: Ryukyu Muay Thai Kingdom, Takeoff!

[31][32][33] On December 21, 2008 (2008-12-21) at the Martial Arts Japan Kickboxing Federation event Break Through 8: Breach, Ichii fought to a majority draw against Mika Nagai.

[34][35] Ichii obtained her first victory in kickboxing by defeating Tomoko SP via unanimous decision on March 1, 2009 (2009-03-01) at M-1 Freshmans.