Akiyama Michiko is Shinichi's mother.
Akiyama's Mother

Akiyama Michiko in the Drama

While raising Akiyama, they were poor to the point where she had to work multiple jobs, but she encouraged him to do his best nonetheless. She bears a strong resemblance to Kanzaki Nao in terms of how honest she is; she foolishly believed the MLM corporation's lies and was forced to commit suicide to repay the debt. She appears in the manga and drama during flashbacks regarding Shinichi's past, told to Nao by Tanimura Teruo in the manga and Tanimura Mitsuo in the drama.