Ishigaki left the band in 1996, it was stated that the harder direction on 4 Plugs may have been why. After leaving, Ishigaki worked on solo material, formed Blade with actor Shinji Takeda, and contributed guitar to other bands, including Tomoyasu Hotei who was an ex-member of Japanese rock group Boøwy.
In 1996, Ishigaki left the band. It was suggested that the more aggressive style on "4 Plugs" might have prompted this decision. Following his departure, Ishigaki worked on solo projects, collaborated with actor Shinji Takeda to form Blade, and contributed guitar to other bands like Tomoyasu Hotei, who had been a former member of Japanese rock group Boøwy.