■ 光学(Koh-Gaku) A producer unit formed in 2020 by Tsudio Studio, SNJO, and HiRO.JP, who have released experience from Local Visions. In December of the same year, the first EP "Opto1: Unico Takano" was released. 2021 Released the second EP "Opto2: Miho Tsujibayashi"and "Opto3: Neibiss".We are active in the form of inviting guests to release each work.