"I made a stupid mistake and I feel terribly sorry for ... everybody involved, because of this," Koaze said through an interpreter during his sentence hearing.
"I didn't give it a lot of thought whether it was criminally illegal.
Koaze's mother told the court she continues to support her son and their relationship has grown stronger since the charges were laid.
"After this incidence he began to realise that is not a preferable hobby," Setsoko Koaze said.
Ms Koaze added that her son had turned to religion and was going to marry.
The court heard Koaze, who speaks limited English, communicated with passengers with basic hand gestures.
He is undergoing psychological treatment for his offences.
Koaze was dismissed by the State Transit Authority the day after police charged him.
The hearing is continuing before Magistrate Michael Price.
- AAP
