is a Japanese noise and free improvisation group with a revolving lineup that has ranged from two members to as many as fourteen in its early days. The group is the project of guitarist , its one constant member, who is head and owner of the Osaka-based Alchemy Records. Other regulars include Jojo's wife Junko and Toshiji Mikawa (also of Incapacitants). The group began at the very end of the 1970s as a performance art-based group whose anarchic shows would often involve destruction of venues and audio equipment, food and garbage being thrown around, and on-stage urination. As the group's lineup changed over time, their focus became less performance-based and more musically based, fine-tuning their sound into a dense wall of noise. History Pre-Hijōkaidan Hijōkaidan originally began in 1979 in Kyoto as a side project of Rasenkaidan members and . They played an improvised session at a studio with fellow Rasenkaidan member (a.k.a. Idiot) in attendance. Afterwards, Takayama said "This is not , it is more like ." This Hijōkaidan played live twice and recorded a few studio sessions. Recordings of this line-up were later released as Original Hijōkaidan or Pre-Hijōkaidan. At the end of the year, Zushi left, and Jojo decided to quit all of his musical projects (Hijōkaidan, Rasenkaidan, and Ultra Bidet). Idiot and Zushi briefly continued Rasenkaidan, and Idiot later formed Idiot O'Clock. Corroded Marie In the spring of 1980, Jojo formed a new group called to play songs in the style of Hawkwind. Initial members were Jojo, (a.k.a. Oka), Katsuhiro Nakajima (a.k.a. Zuke), Masako Shigesugi (a.k.a. Mako), (a.k.a. Ichie), and . Zushi declined to take part. The practice sessions devolved into improvised noise, and Jojo considered disbanding the group, but was convinced otherwise by Oka, Zuke, and Ichiguchi. In June 1980, Corroded Marie was invited to play ACB Hall in Shinjuku, Tokyo at the event , sponsored by the magazine Heaven and arranged by . By mistake, they were billed as Hijōkaidan, Jojo decided to keep the name. After the show Mako left. Disappointed that they didn't play songs or like Hawkwind, Jojo again thought about disbanding the group. He listened to a cassette of the performance repeatedly, and began to consider the possibility of releasing it. In August he met , who had started an independent label called Unbalance Records, and made a deal to release the show. He contacted Zuke and Oka about releasing