Haruka Saruyama
First Appearance: Dumbing of Age 13 September 2010
Relatives: Ryou Saruyama (husband), Dina Saruyama (daughter)
Haruka Saruyama is Dina's mother in the Dumbing of Age continuity, and shares her daughter's quiet demeanor and love of hats.

Dina's parents first showed up during freshman move-in day to help her get settled in; and were briefly seen again during the Freshmen Family Weekend arc. At one point, Sarah Clinton expressed an only-half-joking interest in being adopted by them.