After being phased out by the company in the early 1990s, she traveled to North America, where she first competed in Mexico's Consejo Mundial de Lucha Libre (CMLL), becoming its first World Women's Champion.

[2][8] After Matsumoto's retirement, Nakano won the WWWA World Tag Team Championship a second and third time, with Condor Saito in 1987 and Grizzly Iwamoto in 1988.

[9] One year later in June 1989, she also defeated Mitsuko Nishiwaki to win AJW's All Pacific Championship, which she lost to Noriyo Tateno in November.

[4][12] After she stopped working for AJW, Nakano traveled to Mexico in June 1992, where she was a finalist in a 12-woman battle royal and later defeated Lola González to become Consejo Mundial de Lucha Libre's first World Women's Champion.

Debuting as an associate of Luna Vachon, Nakano competed against the WWF Women's Champion, Alundra Blayze in August 1994 at SummerSlam, but failed to win the title.

[14][15] Nakano eventually defeated Blayze for the title on November 20, 1994, in Tokyo at the Big Egg Wrestling Universe event.

[18][19] Nakano's title run lasted for approximately five months, until she lost it back to Blayze on the April 3, 1995, episode of Raw (in a match taped weeks prior) ending her reign at 134 days.

The WWF had planned on bringing in Bertha Faye to feud with Nakano while Blayze got plastic surgery on her nose and breasts.

[2] On January 8, 2012, Nakano produced her own professional wrestling event, titled "Empress", which saw her recreate her most famous matches with her old opponents.

On September 21, 2023, Bull appeared at the inaugural show for the US based, all-female Japanese pro wrestling promotion Sukeban, where she announced she would be the acting commissioner; she revealed the Sukeban World Championship, and announced the winner of the main event, Ichigo (Unagi) Sayaka, would face Commander (Arisa) Nakajima at the next show—crowning the first champion.