BiSH was initially announced in January 2015 with the idea to begin BiS again, and auditions began that month in order to find members. After the audition process the completed lineup was announced in March, and members Yukako Love Deluxe, Sen to Chihiro Chitti, Aina The End, Hug Mii and Momoko Gumi Company were revealed to the public. The members' faces were obscured with black contact lenses and could not be revealed until they each attained 4,444 followers on Twitter.[Their first song "Spark", from the album "Brand-new idol SHiT", was released through the music site Ototoy as a free download: first as a demo version with vocals by their manager, and then the finished version came one week later. At that time, Yukako Love Deluxe chose to withdraw from the group before their official debut. In an interview with Ototoy, she cited reasons of stress and anxiety in relation to her withdrawal. She had recorded vocals for all tracks on the album, so her parts had to be re-recorded before its release.Her voice was retained, however, on "Spark".

BiSH released a music video for the song "BiSH: Hoshi ga Matataku Yoru ni" (BiSH -星が瞬く夜に-) in April. Following in the footsteps of BiS, known for its grotesque and shocking videos, the "BiSH" video was based around scat imagery. As the release of the album drew closer, BiSH began to release more of its songs as free downloads. By 21 May, just six days before its official release date, all 13 of the album tracks were available for free. This did not harm its sales, however, and their first album reached the 20th position on Oricon's Weekly Album Chart.The debut album of BiS did not reach the top 300.

On 31 May, BiSH held their first one-man concert, "THiS IS FOR BiS", at Nakano Heavy Sick Zero. The venue's capacity was 80 people, but it was chosen for its significance, being the venue where BiS' first one-man was held. During the show, the members announced an audition to recruit more members, and a new single to be released in September.In August, BiSH performed at the TOKYO IDOL FESTIVAL 2015. However, due to their fans and fans of their sister group POP (Period of Plastic 2 Mercy) failing to follow the rules of the festival during the groups' performances, both groups had all events on the second day cancelled. Footage from the festival that was broadcast on TV shows TIF staff members attempting to bring BiSH's performance to a halt in the middle of a song. On August 5, two new BiSH members were revealed: Lingling and Hashiyasume Atsuko, bringing the total number of members up to six. Just as the earlier members of the group, their profile photos were taken with black contact lenses. Their true faces could not be revealed until they gained more Twitter followers than BiSH manager Watanabe Junnosuke. However, Watanabe, growing bored of waiting, lowered the number to 5000 followers for both members, and their faces were revealed later that week.

On the 14th of August 2015, BiSH revealed the music video for their first single, the Celtic metal song "OTNK", featuring the new members. On the 2nd of October 2015 it was announced that BiSH would release a second album with the title "FULL METAL JACKET". This was later revised to "FAKE METAL JACKET". It was released on January 20, 2016. "FAKE METAL JACKET" was promoted with a music video for the song "MONSTERS", which originally appeared on their first album. The new recording for "FAKE METAL JACKET" features Hashiyasume Atsuko and Lingling. Upon release, the album reached 5th place on the daily Oricon album charts.

On the 19th of January, 2016, BiSH announced at the final leg of their "IDOL is SHiT" tour that they would have their major debut, through the label Avex Trax, in May of 2016.

The group released the hardcore punk song "DEADMAN" as their major-label debut single on the 5th of May, billing the 99-second number as "(Probably) the shortest major debut song ever?!" The coupling track "earth" was composed by Tetsuya Komuro and the release was mastered by Tim Young. "DEADMAN" reached 5th position on the Oricon weekly singles chart, and shortly after its release, BiSH announced the release of their major-label debut album in October 2016, yet to be titled.

On the 16th of May, 2016, member Hug Mii announced her withdrawal from BiSH, citing family reasons as the cause. Her last performance will be on the 2nd of June, and a new member is currently being recruited.

členové
Aina The End
Sen to Chihiro Chitti
Momoko Gumi Company
Lingling
Hashiyasume Atsuko

Boysgroup

BiSH

BIN (band)

Be First

Ballistik Boyz from Exile Tribe

B.O.L.T