is a Japanese girl group consisting of Kano Fujihira, Soyoka Yoshida, Tsugumi Aritomo, and Momoe Mori. It was formed in 2019, when the members were 15 years old. The group is active internationally in music, modeling, acting, and other endeavors. Differing from conventional Japanese idols, @onefive describes itself as a "new species of idol" that is not only kawaii, but also values live performance skills and creative involvement. With its "Japanese Classy Crush" concept, the group cherishes the culture of Japan while crushing stereotypes. @onefive is represented by the talent agency Amuse Inc. and is signed with the record label Avex Trax.
Name The name @onefive was chosen because the members were 15 years old at the time of formation, and because it can be pronounced in Japanese as ichi-go ( 'one-five'), referring to the concept of ichi-go ichi-e, which the members value. The "@" symbol, which is silent, was included in the name to mean "from us" and "now from this place". Fans of @onefive are collectively referred to as @fifth.
History 2019–2021: Formation, Mada Minu Sekai, and BBB @onefive was formed in October 2019 by four active members of the Japanese idol group Sakura Gakuin: Kano Fujihira, Soyoka Yoshida, Tsugumi Aritomo, and Momoe Mori. They adopted the stage names Kano, Soyo, Gumi, and Momo, respectively. Fujihira was also active as one of the three rotating "Avengers" support dancers for the kawaii metal band Babymetal, which originated as a sub-unit of Sakura Gakuin. On October 15, 2019, the group created social media accounts on Twitter, Instagram, and YouTube, but the identities of its members were kept secret. On October 19, 2019, while the members were still in Sakura Gakuin, their identities were revealed during the Sakura Gakuin Festival 2019 at the Kanagawa Arts Theatre. During the encore of the show, after performing as members of Sakura Gakuin, they performed their debut single "Pinky Promise" as @onefive for the first time. The choreography for the single was created by Mikiko. "Pinky Promise" was released as a digital single on the following day, October 20, 2019, officially marking @onefive's debut. Shortly after its formation, the group was unable to perform in-person events due to the COVID-19 pandemic, relying instead on an online presence to hold virtual events.
@onefive's first CD single, "Mada Minu Sekai" (まだ見ぬ世界), was released on June 24, 2020. The music video for the title track was recorded by the members at their own homes during the pandemic. The group also collaborated with Adobe on a photo collage contest for the single. On June 25, 2020, the first issue of the youth culture magazine Ite by Ohta Publishing featured @onefive on its cover, wearing the outfits for "Mada Minu Sekai". On June 29, 2020, a four-episode radio special hosted by the members called @onefive's Mada Minu Talk (@onefiveのまだ見ぬトーク) began on JFN Park. A live-streamed performance was held on July 19, 2020, to commemorate the release of the CD single.
On August 30, 2020, the four members officially graduated from Sakura Gakuin with a live-streamed Sakura Gakuin concert titled The Road to Graduation 2019 Final. Fujihira and Yoshida had recorded five albums in total with Sakura Gakuin, while Aritomo and Mori had recorded four. The last album on which they appeared, Sakura Gakuin 2019 Nendo: Story, was released on March 3, 2020, and included their graduation song, "Crossroad".
In September 2020, @onefive collaborated with the Japanese glass manufacturer Hario for the accessories worn as part of the outfits for "Shizuku".
The concert @onefive Online Live: Blue Winter 2020 took place on December 22, 2020. It was streamed without an in-person audience due to the ongoing pandemic. The members chose to perform a vocal cover of "Meri Kuri" by BoA, which was accompanied by member Yoshida playing the piano, as well as a dance to "Snow White Castle" by Yūki Tsujimura.
In January 2021, the group collaborated with the Japanese fashion brand Apres Jour for the outfits worn in the music video for the song "BBB". The CD single "BBB" was released on March 3, 2021.
On November 1, 2021, "Just for You" was featured in the Christmas commercial of the Japanese jewelry brand The Kiss.
On November 24, 2021, the digital single "Underground" was released, which marked the first time that the members of @onefive created their own choreography. They were also deeply involved in the production process of the music video, sharing their ideas on hairstyles, makeup, outfits, visuals, and cuts. The participation of the members in "Underground" was documented, with an emphasis on the choreography, in a four-part documentary series released on YouTube, titled Their Underground (彼女たちのUnderground, Kanojo-tachi no Underground).
2022: 1518, major label debut, and OshiBudō TV drama On February 2, 2022, @onefive released its first studio album, titled 1518, and pronounced ichi-go ichi-e. The "18" in the title represented the age that the members would be turning in the year of the album's release. The title track "1518" marked the first time that the members wrote their own lyrics. They also choreographed the entire song. The other songs on the album, though not written by the members, also contain their thoughts and opinions. The music video for "Lalala Lucky" was produced in collaboration with students of N High School and in cooperation with Adobe. The collaboration highlighted @onefive's desire to be "a group that grows up with the same generation". "Lalala Lucky" was also featured in a web commercial for the Japanese hair dye brand Beautylabo. The members co-choreographed "Lalala Lucky" with Minako "Maru" Maruyama from Elevenplay.
On February 20, 2022, as the circumstances surrounding the COVID-19 pandemic continued to change, the group was able to hold its first in-person solo concert with an audience, titled @onefive 1st Live: 1518, in Osaka at the Umeda Club Quattro. It was followed by a second concert under the same title on March 6, 2022, in Tokyo at the Shibuya Club Quattro. During the second concert, @onefive performed a dance to the song "Let Me Go" by Yūki Tsujimura, who was prominently involved in the music production of the first album. The choreography and stage lighting for the performance of the song were produced by member Fujihira. Member Yoshida also played piano renditions of @onefive's songs "Canned Coffee and Chocolate Bread" (缶コーヒーとチョコレートパン) and "Just for You". The four members choreographed "Just for You". They also decided on the design of the logo for the concerts and merchandise, and planned the setlist and outfits.
@onefive's first festival performance was at Super Mawa Loop Osaka 2022 on May 8. Other festivals included Sakae Sp-ring 2022 on June 5, Yatsui Festival 2022 on June 19, and Spark 2022 in Yamanakako on July 18.
It was announced on August 16, 2022, that @onefive had been cast as members of the fictional idol group ChamJam in the live-action television drama adaptation of the manga If My Favorite Pop Idol Made It to the Budokan, I Would Die, abbreviated in Japanese as OshiBudō (推し武道). Namely, Fujihira would appear as Maki Hakata, Yoshida as Yumeri Mizumori, Aritomo as Yūka Teramoto, and Mori as Sorane Matsuyama. The drama was broadcast for 10 episodes on ABC TV and TV Asahi from October to December 2022, and featured "Miraizu" (未来図) as its theme song.
@onefive made its major label debut with Avex Trax on November 6, 2022, when "Miraizu" was released as a digital single.
The @onefive Live 2022: Spotlight concerts were held in Osaka at the Umeda Club Quattro on November 6, 2022, and in Tokyo at The Garden Hall on November 13, 2022. The members participated in planning the stage production, sharing their ideas on matters such as lighting.
2023: OshiBudō film, Chance×Change, and Justice Day The official fan community service of @onefive was established on January 15, 2023, in the form of a subscription-based mobile application called @onefive Premium. In addition to digital membership cards, it would grant access to exclusive events, diaries, videos, ticket pre-sales, and other premium content. The community was named @fifth on March 3, 2023, and serves as the official fan club of @onefive.
The concert @onefive Live 2023: Chance×Change, which was held in Tokyo at the Ex Theater Roppongi on April 9, 2023, marked the first time that the audience could sing and cheer out loud, being no longer restricted by the COVID-19 pandemic. It also coincided with the transition of the members of @onefive from high school to university, a "change" that they each elaborated on during the conversational parts of the concert.
On May 12, 2023, the live-action film adaptation of the manga If My Favorite Pop Idol Made It to the Budokan, I Would Die, abbreviated in Japanese as OshiBudō (推し武道), was released with "Chance" as its theme song. The four members of @onefive reprised their roles from the television drama. Their vocals as ChamJam from the film and television drama adaptations were included on the second disc of the two-disc album I Live For You (きみのために生きてる, Kimi no Tame ni Ikiteru), released by Pony Canyon on May 10, 2023.
The CD single "Chance×Change" was released on May 24, 2023. The music video for "Ring Donuts" featured a collaboration with Krispy Kreme Doughnuts.
On August 4, 2023, @onefive performed at the TGC Teen 2023 Summer fashion festival, which was held at the Yoyogi National Gymnasium.
@onefive participated for the first time in the Tokyo Idol Festival on August 6, 2023, in Odaiba. The group had two performances, first at the "Sky Stage" on the rooftop of the Fuji Television Wangan Studio, and second at the "Heat Garage" at Zepp DiverCity. The members themselves had previously participated every year in the festival when they were part of Sakura Gakuin.
On August 14, 2023, a short film was released for the song "Like A", featuring actor Taisuke Niihara and the members of @onefive. The members were involved in the production from the scriptwriting stage. The film was entered into the TikTok Toho Film Festival 2023.
On August 20, 2023, @onefive performed as a special guest after the Ciao Girl 2023 Audition at the Ciao×Ribon Girls Comic Festival, which was held at Pacifico Yokohama.
The CD single "Justice Day" was released on August 23, 2023. "Like A" was featured in a commercial for the Japanese jewelry brand The Kiss on August 26, 2023.
The group performed at Giga Giga Sonic at the Makuhari Messe on October 7, 2023. Members Mori and Yoshida also walked the runway as models.
In November 2023, @onefive was selected to be the Generation Z Leader for Amazon Fashion Japan. The members began modeling for Amazon with seasonal outfits incorporating coats, sweaters, and other winter essentials, while aiming to convey the charm of Generation Z through fashion.
November 17, 2023, marked the creation of the group's official characters, or mascots, called @chib15, pronounced chibi five. Each of the four members designed their own character: Laa the lion by Fujihira, Babu the chick by Yoshida, Zoey the fawn by Aritomo, and Mimi the rabbit by Mori.
In the final quarter of 2023, the group held two concerts under the title @onefive Live 2023: No15e Maker. The first concert, subtitled Underground, was held in Osaka at the Yogibo Meta Valley on November 25, 2023. The second concert, subtitled Overground, took place in Tokyo at the Ex Theater Roppongi on December 21, 2023. The two subtitles referred to the process of rising from the underground.
2024: Classy Crush and first nationwide tour