Kanae Sumida's mother is a minor character in 5 Centimeters per Second. As her parent, her surname must be Sumida (澄田, Sumida)
Background[]
She gave birth to her first child in 1974, and her second daughter in 1980. Her husband was never mentioned.
In 5 Centimeters per Second[]
During Kanae's last year of high school, she and Kanae's sister were worried by her indecision of the future.
In 5 Centimeters per Second manga[]
10 years later, she was seen playing with her grandsons.