Tomoko Higashikata

Tomoko Higashikata (東方 朋子) is a minor character from Part IV: Diamond is Unbreakable. She is the mother of Josuke Higashikata, the series' protagonist.

Personality
An attractive single mother practicing a teaching profession, she is known to have a strong temperament. Little is known about her relationship with Joseph Joestar other than that they had an affair while she was in college with the 62 year old man, which produced an illegitimate child, Josuke, of which Joseph had no knowledge of until the boy was 16. She remains deeply in love with Joseph despite the man already being married, and according to Josuke, becomes emotional at the memory of him. She is also fond of a particular sponge cake from Kamakura.

Steel Ball Run
Tomoko's counterpart in the Steel Ball Run universe is the mother of Norisuke Higashikata IV, who was given the name "Josuke" at birth. However, she married Norisuke Higashikata III and into the Higashikata family from the outside. Her husband's birth name is "Joshou", which bears similarity to the first name of "Joseph Joestar".