Why don't Nobuchika Ginoza and Tomomi Masaoka share the same last name?


It's revealed in the last episode that:

> Nobuchika GINOZA is Tomomi MASAOKA's son.

But, I don't understand why they don't share the same last name. There must be
a particular reason for this.




Because his father was demoted and became an enforcer, Nobuchika was ashamed,
so he picked his mother's last name instead. His mother is Akiho Ginoza.




Most probably it's because otherwise his name would raise too much suspicion
and intervene with his life. Many people in real life carry their mother's
maiden name for similar reasons, so it's not surprising.

