Complex sentence: Therefore, the first Karibow productions were released under the same pseudonyms Rüsing had been using with his former solo projects and the name "Karibow" first appeared on the album "Supernatural Foe Vocalized" in 1998.
Split into simpler sentences: Therefore, the first Karibow productions were released under the same pseudonyms Rüsing had been using with his former solo projects. For the first time, the name "Karibow" first appeared on the album "Supernatural Foe Vocalized" in 1998.