原因は自分にある。 (Genin wa Jibun ni Aru.)

Overview

原因は自分にある。 (abbreviated Genjibu or GNJB) is a seven-member Japanese vocal and dance group signed to Stardust Promotion. Formerly known as BATTLE STREET, the group has a fanbase called "Kansokusha" (Observers). The name takes the word "cause" in a positive light, expressing the aim of being an avant-garde unit that keeps making an impact and creates a new era of entertainment.

The group grew out of the "BATTLE STREET" project, a street-style unit planned by SDR and HMV for Kanto-area members of BATTLE BOYS, the EBiDAN trainee selection project. The members are Kuuto Okura, Misaki Koizumi, Masaya Sakuragi, Ryota Nagano, Jun Muto, Kazuto Mokudai and Kanato Yoshizawa.

Career

BATTLE STREET era (2018–2019)

• On August 14, 2018, the project began, with demo tracks played in Lawson stores and members chosen by vote.
• Six members were selected on October 15, and Koizumi was added on November 15, making seven.
• The Loppi/HMV-exclusive first single "ebidence" came out on December 19, 2018, followed by "Show Time!!" on June 19, 2019.
• On July 7, 2019, at BATTLE BOYS LIVE 2019 at Toyosu PIT, they announced their official debut as a unit.

After the rename

• The group became 原因は自分にある。 on August 7, 2019, and released its first single of the same name on October 9, followed by its first two-man live on October 26.
• In January 2020 came the second single "Kōshi ni kansuru yoron chōsa" (嗜好に関する世論調査). Digital releases such as "Shakespeare ni manabu ren'ai teiri" (the opening theme of the drama "Toshi no sa kon") and the online live series "Virtual Genjibu Space" followed.
• On January 13, 2021, the first album "Tasekai Shakai" (多世界解釈) reached No. 1 on the Oricon daily album chart. They held their first live show with an audience in April, launched the paid fan club "Genjibu Kansokujo" in August, and released the second album "Kyozo to Jitsuzo" (虚像と実像) on December 8. "Gouu" served as an ending theme for the drama "Janai Hō no Kanojo".
• In 2022 they released songs including "Genin wa Kimi ni mo Aru." and "Q", held the case.3 and case.4 one-man lives and a fan club tour. From August, Kazuto Mokudai limited his group activities because of his role in "Kamen Rider Geats".
• The third album "Mugen no Owari" (無限の終わり) arrived on January 25, 2023. Their first live with audience cheering, LIVE 2023 -Loud&Shuffle-, began in April, and Kanato Yoshizawa became leader in May. The third single "Foxy Grape" followed on June 7, and the song "Rōsoku" became the theme of a drama starring the group. ARENA LIVE 2023 was held on November 5.
• On March 13, 2024 they released the concept EP "Kateihō no Anata e"; the LIVE TOUR 2024 sold out all seven shows. "P-P-P-PERO" became the theme of the anime "Egumi Legacy", with Okura making his voice-acting debut. The 5th Anniversary LIVE was held on July 7, and the second arena one-man live on November 17, where a partnership with Universal Music was announced. The concept EP "Tetrahedron" was released on December 4, and Christmas live shows were held in December.
• In 2025, "LLL" (March) was written with contributions from .ENDRECHERI./Tsuyoshi Domoto. The group toured nationwide, became 15th-anniversary ambassador of the anime "GO!GO! Chuggington", and performed ARENA LIVE 2025 on July 12–13 at Yoyogi National Gymnasium's First Gymnasium, their largest venue to date. The fourth single "Paranoid Rendezvous" (October 15) featured songs by Enon Kawatani and others, and their first fan-club-only tour opened in December.
• In 2026 they released "NOW" (January), the concept EP "Bungei Kaitai Shinsho" (March 11) and toured with LIVE TOUR 2026. Their first arena tour, ARENA TOUR 2026, began on June 27, and "Kaen" (July 6) became the opening theme of the TV anime "Tetsunabe no Jan!". The fifth single "Lovely Season" is scheduled for November 11.

Musical style

The group presents a distinctive style blending elements of Vocaloid-style music, J-POP, Japanese rock and hip-hop. They frequently collaborate with outside songwriters and artists, and all members have starred in dramas, alongside their group activities.