Mine Yamakawa appears in the anime special "Aki ga Ippai" as Kobo Tabata's maternal grandmother and Sanae Tabata's mother. She resides in a multigenerational home with her husband Iwao Yamakawa, their daughter Sanae, son-in-law Kouji Tabata, and grandson Kobo. The household also includes a dog named Bochi and a cat named Mii.

Mine is elderly and wears glasses, while her husband Iwao is similarly elderly with facial hair. Together, they contribute to household management and childcare alongside Sanae and Kouji, reflecting a traditional Japanese family structure where grandparents actively support daily domestic life.