Since Sui, from the Northern Dynasty line, unified China, Ju-gaku in early Sui was mainly northern learning, but in the era of Yo-dai (Emperor Yang), the two Ryu, Ryu Shaku and Ryu Gen appeared, and integrated northern and southern Ju-gaku by taking up "Interpretation Learning of Classical History" by Hi Kan and creating Giso for southern learning annotations.
北朝系の隋が中国を統一したので、隋初の儒学は北学中心であったが、煬帝の時、劉シャク（りゅうしゃく）・劉炫（りゅうげん）の二劉が出、費カンの『尚書義疏』を取りあげたり、南学系の注に義疏を作ったりして南北の儒学を総合した。