Yoshino River
Aizumi is situated on the north side of the downstream area of the Yoshino River, which flows through the middle of Tokushima. The town is located around the middle of Itano District in a delta zone that surrounds the Yoshinogawa and old Yoshinogawa. At 5.17 meters above sea level it is a very flat area with no hilly or mountainous areas found within the confines of the town district.