Banyo is produced by Bandai Jozo, the sole sake brewery on the Izu Peninsula in Shizuoka Prefecture, operating out of Shuzenji. As the only brewery in the region, Bandai Jozo also produces private-label sake for local guesthouses and municipalities, making it deeply embedded in Izu's hospitality culture. The Banyo label represents the brewery's heritage offering, reflecting the character of this coastal brewing environment.
