2: We Want To Shine with a victory by submission (armbar) over the previously undefeated Ikuma Hoshino, who at the time was the most accomplished female Japanese MMA fighter.
In her ninth professional bout, she faced Brazilian fighter Ana Michelle Tavares.
After her first loss, Tsuji won her next four fights and then faced Hisae Watanabe at Smackgirl - Road to Dynamic!!
At the event Smackgirl - Queens' Hottest Summer, Tsuji was able to avenge her only loss at the time by defeating Tavares via KO at 4:47 of the first round.
[9] Tsuji became the first Valkyrie Featherweight Champion on April 25, 2009 (2009-04-25) by defeating American fighter Kate Martinez.
[2][10] Her 14-fight winning streak came to an end on February 11, 2010 (2010-02-11) when she rematched Mei Yamaguchi, who this time was able to defeat Tsuji with a rear-naked choke in only 76 seconds.
[19] On September 29, 2012 (2012-09-29), Tsuji faced Hyo Kyung Song at Deep Osaka Impact 2012.