World Wonder Ring Stardom (2010–2015) Hirano was presented as part of
World Wonder Ring Stardom's roster at the promotion's first press conference on September 7, 2010. She was trained by
Fuka Kakimoto alongside the likes of Eri Susa,
Mayu Iwatani,
Yoko Bito and
Yuzuki Aikawa as part of Stardom's first class of trainees. Hirano was given the
ring name Yoshiko, spelled with the
Roman numeral for the number four, IV, read as "shi". She was given a
villainous character, inspired by the
yankii culture. Afterwards, Yoshiko formed a partnership with veteran wrestler
Natsuki☆Taiyo. On November 27, Yoshiko and Taiyo were defeated by Aikawa and Bito in the finals of the 2011
Goddesses of Stardom Tag League, which was used to determine the inaugural
Goddesses of Stardom Champions. Yoshiko ended the year by winning a four-woman tournament contested between the class one trainees to become the 2011 Rookie of Stardom. Meanwhile, Kawasaki Katsushika Saikyou Densetsu expanded into "Kawasaki Katsushika Saikyou Densetsu Plus One" with the additions of
Act Yasukawa,
Kyoko Kimura and Saki Kashima. After three successful title defenses, Yoshiko and Taiyo lost the Goddesses of Stardom Championship to former stablemate Kyoko Kimura and
Hailey Hatred on March 17. On April 29, Yoshiko main evented Stardom's
Ryōgoku Cinderella event, defeating Yuzuki Aikawa in her retirement match. On October 17, Yoshiko took part in a sixteen-woman elimination tag team match, promoted by
Sendai Girls' Pro Wrestling. The match pitted a team of younger wrestlers against a team of industry veterans. Yoshiko won the match for the younger generation by scoring the final elimination over Sendai Girls' founder
Meiko Satomura. Back in Stardom, Yoshiko continued teaming with Taiyo until her retirement in June 2014. On the road to her retirement, Taiyo was defeated by Yoshiko on March 16 in what was billed as the final match between the teacher and student pairing. After going solo, Yoshiko won Stardom's top title, the
World of Stardom Championship, by defeating
Io Shirai on August 10, 2014. On January 18, 2015, Yoshiko successfully defended the World of Stardom Championship against Takahashi.
Incident with Act Yasukawa On February 22, 2015, Yoshiko faced former stablemate Act Yasukawa in her third defense of the World of Stardom Championship. The match saw Yoshiko
go off script, legitimately beating Yasukawa until veteran wrestler Kyoko Kimura threw in a towel to end the match after less than eight minutes. Afterwards, Yasukawa was diagnosed with fractured
cheek,
nasal and
orbital bones, which required surgery. Yasukawa had had issues with her eyes before the incident, having undergone a
cataract surgery the previous year. The incident received mainstream attention in Japan and became known as . The incident also strained the relationship between Stardom's management and top wrestler Nanae Takahashi, leading to Takahashi quitting the promotion in May. On May 31, Stardom announced that Yoshiko had decided to retire from professional wrestling. Her retirement ceremony took place on June 14, however, during the closing ten-bell salute meant to signal the end of her career, Yoshiko walked out on the ceremony, leading to questions over whether she was truly retired. Yasukawa eventually returned to the ring on September 23, 2015, but retired the following December due to the damage inflicted on her eye in the incident with Yoshiko.
Seadlinnng (2016–present) Yoshiko returned to professional wrestling on January 11, 2016, during an event held by Nanae Takahashi's new
Seadlinnng promotion. She appeared ringside, supporting Takahashi during her main event match against Meiko Satomura. On February 11, Seadlinnng officially announced that Yoshiko (now with a revised ring name) had joined the promotion and would be returning to wrestling full-time. Her return match took place on March 7 and saw her defeat Takahashi. Afterwards, Yoshiko also began making appearances outside of Seadlinnng, working for Sendai Girls' Pro Wrestling on April 8, World Woman Pro-Wrestling Diana on May 5, and participating in
Pro Wrestling Wave's
2016 Catch the Wave tournament between April 10 and June 5, making it to the semifinals, before losing to eventual tournament winner Ryo Mizunami. On August 24, 2017, Yoshiko defeated Takumi Iroha in the finals to win the Ultra U-7 Tournament. On October 29, Yoshiko defeated
Hiroyo Matsumoto to win the
Oz Academy promotion's top title, the
Oz Academy Openweight Championship. On July 25, 2018, Yoshiko and Rina Yamashita became the first Seadlinnng
Beyond the Sea Tag Team Champions, defeating Nanae Takahashi and
Tsukasa Fujimoto. Yoshiko and Rina Yamashita, in the Oz Academy promotion, defeated Maya Yukihi and
Mayumi Ozaki to win the
Oz Academy Tag Team Championship on September 17, the match was also for the Beyond the Sea Tag Team Championship.
Return to Stardom (2020–present) After five and a half years since leaving Stardom, Yoshiko alongside Nanae Takahashi, made their surprise return where they confronted
Mayu Iwatani,
Momo Watanabe,
Starlight Kid and
Saya Iida. Yoshiko had her return match against Iwatani at
Stardom's 10 Year Anniversary All Star Dream Cinderella show. == Mixed martial arts career ==