By-Sexual (stylized as BY-SEXUAL) was a Japanese visual kei punk rock band from Osaka. They were active from 1988 to 1995, when vocalist Sho left the band and they went on hiatus. In August 1996, the remaining members restarted the group under the name By-Sex (stylized as BY-SEX) with Ryo taking over vocals in addition to guitar. In February 1998, Nao left and the group disbanded. On September 3, 2011, By-Sexual reunited for a show at Shinagawa Stellar for the victims of the 2011 Tōhoku earthquake and tsunami. Around the same time, Ryo and bassist Den teamed up with their Zigzo bandmate Sakura to perform as By-Sex. The four reunited again for the October 14, 2016 Visual Japan Summit at Makuhari Messe and Chain the Rock Festival on August 26, 2017. History By-Sexual was formed in April 1988 in Osaka. That year they released the demo "Bad Boy Blues" on Free-Will records. They signed to Pony Canyon and in February 1990 they released their major debut, "So Bad Boy". Their first album Culture Shock followed in April. It reached number 6 on the Oricon chart and was named one of the top albums from 1989-1998 in a 2004 issue of the music magazine Band Yarouze. Their song "Bakumatsu Junjoden" was used as the theme song for the 1991 movie of the same name starring Riho Makise and sold over 100,000 copies. In January 1995, vocalist Sho left the band and they went on hiatus. However the remaining members continued to play together under the name Alzheimer. In August 1996, they restarted the group under the name By-Sex with Ryo changing to vocals and guitar. In February 1998, Nao left and the group disbanded. Sho made an attempt at a solo career, but soon changed to managing bands before retiring from the music industry altogether. Both Ryo and Den went on to form the bands Zigzo, Pt. (Platinum), and are currently in Test-No.. Nao joined Nitro (now known as Food), Nakata Band (who later changed their name to The Heavenly Curve) with Zi:Kill bassist Seiichi, and Badub. Den and Nao were both support members for Machine (duo of Penicillin's Hakuei and Spread Beaver's Kiyoshi). On May 9, 2011, it was announced via Nao's Twitter and Den's blog that By-Sexual would reunite for one night. All proceeds were donated to the Japanese Red Cross for the victims of the 2011 Tōhoku earthquake