[2] Nagashima eventually made her in-ring debut at Gaea Japan's inaugural event on April 15, 1995, wrestling Toshie Uematsu to a twenty-one-minute draw.

[2][4] On July 31, Nagashima turned on the Gaea Japan Seikigun ("regular army") and joined forces with Mayumi Ozaki, Carlos Amano and Sugar Sato, forming a stable, which later became known as Oz Academy.

[6][7] In May 2000, Nagashima and Sato ended their longtime partnership with Mayumi Ozaki by quitting her Himiko stable, the most recent incarnation of Oz Academy, and returning to Gaea Japan Seikigun.

[18] On February 26, 2012, Nagashima defeated Seikigun stablemates Hiroyo Matsumoto, Ran Yu-Yu and Yumi Ohka to become the number one contender to the Oz Academy Openweight Championship.

[19] On March 25, Nagashima defeated Ozaki in a Dress Up Wild Fight 30 minute Time of the Trial match to become the new Oz Academy Openweight Championship.

[20] Initially a reluctant member of Seikigun, Nagashima embraced her "dark side" only after cheating to successfully defend the Oz Academy Openweight Championship against Hiroyo Matsumoto on August 19.

[22] On April 24, Nagashima lost the Oz Academy Openweight Championship to Akino in her third defense, ending her reign at 395 days, the longest in the title's history.

[34][35] Nagashima's first major match since becoming a freelancer took place on September 23, 2015, when she unsuccessfully challenged Ayako Hamada for Pro Wrestling Wave's Single Championship.