Yuka Tsuji

Early life Tsuji was born on in Hirakata, Osaka, Japan. She graduated from the prestigious Chukyo Women's University; a university notable for its wrestling family. During her time there, Tsuji placed third in Women's Freestyle Wrestling (51 kg) in the 1997 Asian Championship. This would be Hoshino's only loss in her MMA career.

Tsuji debuted in Smackgirl at Smackgirl – Royal Smack 2002 on , defeating Hiromi Oka by submission due to a rear naked choke. Including her debut, Tsuji would go on a winning streak of 8 consecutive victories; in the process winning the Smackgirl Japan 2002 Cup Middleweight Tournament on . In her ninth professional bout, she faced Brazilian fighter Ana Michelle Tavares. Tavares defeated Tsuji with a triangle armbar submission in Tsuji's debut for the Deep promotion at Deep – 11th Impact on . In this match, Tsuji injured her left shoulder. This was Tsuji's first defeat in MMA. She avenged this loss years later.

After her first loss, Tsuji won her next four fights and then faced Hisae Watanabe at Smackgirl – Road to Dynamic!! for the first Smackgirl Lightweight Championship on . Tsuji won the title after defeating Watanabe by armbar at 3:51 of the first round. She would go on to successfully defend the title five times until the demise of the Smackgirl promotion.

On , Tsuji would get the chance to face Tavares again. 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. After defending her title for the last time against South Korean Seo Hee Ham, Tsuji debuted in Valkyrie at the promotion's inaugural event Valkyrie 1 on , where she defeated Mei Yamaguchi by decision. Tsuji became the first Valkyrie Featherweight Champion on by defeating American fighter Kate Martinez.

Her 14-fight winning streak came to an end on when she rematched Mei Yamaguchi, who this time was able to defeat Tsuji with a rear-naked choke in only 76 seconds. This was just the second time that Tsuji was defeated and the first time that she was defeated by a fellow Japanese fighter. This is considered one of the biggest upsets in the history of women's mixed martial arts.

Having recovered from surgery on her knee and shoulder, Tsuji returned to MMA in a Jewels vs. Valkyrie bout against Saori Ishioka at Jewels 15th Ring on in Tokyo, Japan. She defeated Ishioka by unanimous decision.

Tsuji faced Ayaka Hamasaki in a Jewels lightweight title fight at Jewels 19th Ring on in Osaka, Japan. She was defeated by submission due to a kimura in the first round.

On , Tsuji faced Hyo Kyung Song at Deep Osaka Impact 2012. She defeated Song by technical submission due to an armbar in the first round.

Mixed martial arts record Win

Hyo Kyung Song Technical Submission (armbar) Deep: Osaka Impact 2012

Osaka, Japan Loss

Ayaka Hamasaki Submission (kimura) Jewels 19th Ring

Osaka, Japan For Jewels Lightweight (115 lbs) Queen Championship Win

Saori Ishioka Decision (unanimous) Jewels 15th Ring

Tokyo, Japan Loss

Mei Yamaguchi Submission (rear-naked choke) Valkyrie 04

Tokyo, Japan Lost Valkyrie Featherweight Championship Win

Mei Yamaguchi Decision (unanimous) Valkyrie 01

Tokyo, Japan Win

Seo Hee Ham Decision (unanimous) Smackgirl – Starting Over

Tokyo, Japan Defended Smackgirl Lightweight Championship Win

Ana Michelle Tavares TKO (punches) Smackgirl – Queens' Hottest Summer

Tokyo, Japan Non-title bout Win

Thricia Poovey TKO (punches) Smackgirl – The Dance of the Taisho Romance

Osaka, Japan Defended Smackgirl Lightweight Championship Win

Tomomi Sunaba Submission (rear-naked choke) Smackgirl – Top Girl Battle

Tokyo, Japan Defended Smackgirl Lightweight Championship in a "Winner Take All" match (Tsuji received both fight purses). Win

Miyuki Ariga Submission (heel hook) MARS

Tokyo, Japan Win

Maiko Ohkada Submission (armbar) Smackgirl – Dynamic!!

Tokyo, Japan Defended Smackgirl Lightweight Championship Win

Erica Montoya Submission (armbar) Smackgirl – Holy Land Triumphal Return

Tokyo, Japan Win

Chiaki Kawabita Submission (armbar) Smackgirl – Go West

Osaka, Japan Win

Mayumi Hashiba Submission (kneebar) Smackgirl – F8

Tokyo, Japan Win

Kaliopi Yeitsuidou Decision (unanimous) Inoki Bom-Ba-Ye 2003

Kobe, Japan Loss

Ana Michelle Tavares Submission (triangle armbar) Deep – 11th Impact

Osaka, Japan Win

Tomomi Sunaba Technical Submission (armbar) Smackgirl – Third Season 2

Tokyo, Japan Win

Mari Kaneko Decision (unanimous) Smackgirl – Japan Cup 2002 Grand Final

Tokyo, Japan Became 2002 Japan Cup Middleweight Tournament Champion 2002 JAPAN CUP middleweight tournament champion Inaugural Valkyrie Featherweight Champion (2009) Fight Matrix 2002 No. 1 Female Fighter of the Year 2004 No. 1 Female Fighter of the Year 2005 No. 1 Female Fighter of the Year