Mount Iizuna (飯縄山, Iizuna-yama), also known as Mount Izuna (飯綱山, Izuna-yama), is a mountain located ten kilometers north-northwest of the heart of Nagano, Nagano Prefecture, Japan. Together with Mount Reisenji (霊仙寺山, Resenji-yama), Mount Menō (瑪瑙山, Menō-yama), and others, it forms the Iizuna range.