It's a harmony of red sweet and sour strawberries, black rich red bean paste, and white fluffy mochi.
I tried the "Imuraya Omochi Sweets Ichigo Daifuku-style Ice Cream" from FamilyMart (Famima). Red sweet and sour strawberries, black rich red bean paste, and white fluffy mochi are all combined into one and topped with mild milk ice cream.