at Korakuen Stadium on March 31, 1981, before going their separate ways. Mie and Kei have since reunited several times to record new songs and perform special concerts. Solo career Following Pink Lady's disbandment, Masuda signed with Reprise Records and released her first solo single on November 28, 1981. Written by Miyuki Nakajima, the song made it to No. 9 on Oricon's singles chart and sold 267,000 copies. In contrast to Pink Lady and Mie's pop style, Masuda's solo efforts focused on more traditional kayōkyoku with her uniquely deep voice. "Suzume" was followed by (written by Yumi Matsutoya), (written by Mariya Takeuchi), and (written by Keisuke Kuwata). Masuda put her solo career on hiatus in 1986, but in 1989, she made her debut in France with the album Simples Confidences, which consisted of six French-language and four English-language songs. The album was released in Japan as Voice Cologne. During this time, Masuda used the stage name "kéi" as a singer while retaining her real name as an actress. She also released her gravure book in 1990. In 2001, Masuda starred as Vi Moore in the Japanese adaptation of the Footloose stage musical. The production also featured her Pink Lady partner Mie as Ethel McCormack. In September 2004, Masuda released her autobiography . A year later, she released , her first single in 15 years. In 2008, Masuda released , her first solo album in 19 years. The album features self-covers of her solo singles and the Pink Lady hit songs "UFO" and "Nagisa no Sindbad". On February 21, 2018, Masuda released the single /, 13 years after her last single. The songs were composed by Tokiko Kato and Yū Aku, and previously recorded by Kato. In 2019, Masuda starred as Julietta in the stage musical . In April 2022, Masuda released the single "Del Sole" to commemorate the 40th anniversary of her solo career. She also announced the release of the compilation album Soshite, Koko kara..., which will include her past singles and five new recordings, plus the recording of her 40th anniversary concert in November 2021. The limited edition release of the album will include a DVD of the concert. Personal life In 1979, Masuda had a publicized relationship with singer Goro Noguchi. This affair put a strain between her and Pink Lady's management T&C Music, who forbade the relationship, especially when the duo were preparing to work in