Mameshiba no Taigun
| Company type | Idol group |
|---|---|
| Industry | Music |
| Founded | December 18, 2019 |
| Defunct | January 2024 |
| Fate | Merged with Tonai Bousho to form Mameshiba no Taigun Tonai Bousho a.k.a. MonsterIdol in January 2024; resumed activities in January 2025 |
| Successor | Mameshiba no Taigun Tonai Bousho (MonsterIdol) |
| Headquarters | Tokyo , Japan |
Area served | Japan |
| Products | Music (singles, albums) |
Number of employees | 5 (members as of latest lineup) (2025) |
, presented as MAMESHiBA NO TAiGUN, is a Japanese alternative idol girl group created via the reality survival competition Monster Idol, which aired on TBS Television's Wednesday's Downtown in 2019. Their official debut occurred on December 19, 2019, with the single "Restart". Activities were halted in January 2024 following a merger with Tonai Bousho, resulting in the formation of Mameshiba no Taigun Tonai Bousho a.k.a. MonsterIdol. They resumed as Mameshiba no Taigun in January 2025.
2019–2020: Formation and debut
Mameshiba no Taigun came into existence on December 18, 2019, during the finale of the TBS reality survival series Monster Idol. The contestants included Hanae, Nao, Aika, and Miyuki; notably, Hanae was also affiliated with WACK’s trainee ensemble Wagg. Their inaugural single "Restart" was released the following day, December 19. Subsequently, on December 25, Kaede was introduced as the group's fifth member.
The stage names of the members were publicly announced on January 1, 2020. On March 4, the group simultaneously released their second and third singles, "Rocket Start" and "Daijōbu Sunrise".
Their first full-length album, Start, initially scheduled for release on May 13, 2020, was postponed to June 10 due to the impact of the COVID-19 pandemic. Before the album launch, digital singles "Flash" and "Donkusa Happy" were made available. On August 5, they declared their major label debut with the triple A-side single "AAA" under Avex Trax, which was released on October 7. The group earned the New Artist Award at the 62nd Japan Record Awards on December 30.
2021–2022: Must Change Project and audition camp
Their sophomore studio album, Mamejor!, was released on January 20, 2021. This was followed by their first extended play, Wow!! Season, on July 14. Later that year, on December 22, they issued their second major single titled "Kinō wa Modoranai / Koi no Full Swing".
On July 20, 2022, their third major single "Mamen Joy / Machigai Darake no Hero" was launched. Prior to releasing their subsequent single "Must Change", they initiated the "Must Change Project" on September 7. This project featured solo editions of the CD single for each member; the highest-selling version would lead to a solo debut for that member, while the lowest-selling one required that member to undergo a re-audition process. The fourth major single "Must Change" was released on December 7. On December 10, Nao emerged as the winner of this project securing her solo debut opportunity; conversely, Aika had to participate in an audition camp.
From December 11 through December 14, an audition camp named Mameshiba no Taigun Nari no Gasshuku (豆柴の大群なりの合宿) took place to select new members. Although only Aika originally joined due to her project outcome, all current members except Kaede also participated with their membership status at stake. The camp was organized following incidents of unprofessional conduct that resulted in a canceled engagement and complications with staff. While Nao and Aika were initially dismissed during this process, both ultimately retained their places in the group.
Kaede officially graduated from Mameshiba no Taigun on December 17 during the We Must Change Tour Final event. At this time, two new members—Reona and Momoka (later known as Leonaempire and Momoti Ngale)—who were chosen through the audition camp joined the lineup. Their official debut with the group occurred on January 6, 2023. On that same day, a re-recorded version of "Must Change," titled "Must Change -We Keep Changing-," featuring the updated lineup without Kaede was released.
2023–present: MonsterIdol era and reunion
Their third full-length album, Mamequest, was launched on February 22, 2023. Following this, the digital track "Mamethunder" was issued on July 29. Subsequently, their fifth major single, "PRiPRi / Sing Along Time!", became available on October 4. On December 25, Hanaemonster and Miyukiangel officially departed from the ensemble.
On January 6, 2024, Mameshiba no Taigun joined forces with Tonai Bousho, creating the new entity Mameshiba no Taigun Tonai Bousho a.k.a. MonsterIdol. Later, on January 8, 2025, Mameshiba no Taigun reassembled featuring the definitive MonsterIdol lineup along with Hanaemonster rejoining the group. The following day marked the release of their first digital single after regrouping, titled "Reload." On June 4, they unveiled a triple A-side single containing "Reload," "Retry," and "Mysterious Party."
Current
Former
Studio albums
| Title | Album details | Highest chart rankings | |
|---|---|---|---|
| Oricon | Billboard | ||
| Start (スタート) |
|
10 | 10 |
| Mamejor! (まめジャー!) |
|
11 | 13 |
| Mamequest |
|
7 | 12 |
Extended plays
| Title | Album details | Highest chart rankings | |
|---|---|---|---|
| Oricon | Billboard | ||
| Wow!! Season (Wow!! シーズン) |
|
8 | 13 |
As lead artist
| Title | Year | Peak chart positions |
Album association | |
|---|---|---|---|---|
| Oricon | Billboard | |||
| "Restart" (りスタート) | 2019 | 1 | 3 | Start |
| "Rocket Start" (ろけっとすたーと) | 2020 | 22 | — | |
| "Daijōbu Sunrise" (大丈夫サンライズ) | 23 | — | ||
| "Samabari" (サマバリ)Template:Efn-ua | 4 | — | Mamejor! | |
| "Koi no Kakezan ABCDEFG" (恋のかけ算 ABCDEFG)Template:Efn-ua | — | |||
| "Ima" (今)Template:Efn-ua | — | |||
| "Love Chikyu" (らぶ地球) with First Summer Uika | 2021 | — | — | rowspan=4 Template:N/A |
| "Kinō wa Modoranai" (昨日は戻らない) | 6 | — | ||
| "Koi no Full Swing" (恋のフルスイング) | — | |||
| "Oshogatsu" (お正月) | — | — | ||
| "Sakura Iro" (桜色) | 2022 | — | — | Mamequest |
| "Mamen Joy" (豆んJoy) | 3 | 71 | rowspan=3 Template:N/A | |
| "Machigai Darake no Hero" (間違いだらけのヒーロー) | — | |||
| "Must Change" | 3 | 51 | ||
| "Must Change -We Keep Changing-" | 2023 | — | — | Mamequest |
| "Mamethunder" (豆サンダー) | — | — | rowspan=6 Template:N/A | |
| "PRiPRi" (ぷりぷり)Template:Efn-ua | 5 | — | ||
| "Sing Along Time!"Template:Efn-ua | ||||
| "Reload" (りロード)Template:Efn-ua |
rowspan=3 |2025 |
rowspan=3 |6 |
||
| "Retry" (リトライ)Template:Efn-ua | ||||
| "Mysterious Party" (ミステリアスパーティー)Template:Efn-ua | ||||
Collaborative Works
| Title | Release Year | Highest Chart Ranking |
Associated Album |
|---|---|---|---|
| Oricon | |||
| "Zutto ki ni Naru Zucchini" (ずっと気になるズッキーニ) featuring Yuki Kashiwagi | 2021 | 11 | Template:N/A |
Accolades and Recognitions
| Award Event | Year | Category | Nominee(s) / Entry | Outcome |
|---|---|---|---|---|
| Japan Record Awards | 2020 | Best New Artist | Mameshiba no Taigun | Template:Won |