This document introduces the four seasons in Mt. Aso, Japan. In spring, the mountain hosts fire festivals in March and the landscape begins to bloom. In summer, fields of sunflowers and azaleas decorate the area, attracting many visitors. Autumn is marked by large cosmos gardens with orange, pink, and white flowers. Winter brings deep snow and frozen ponds, though festivals like the Aso X'mas balloon festival provide entertainment through illuminated balloons and performances.