Rikichi Yamada  

, 山田 利吉

Yamada Denzous only child is an accomplished and esteemed 18-year-old freelance ninja who frequently works. Although his dad teaches at the Ninjutsu Academy, he did not attend it himself. However, students there highly respect him. The academy is far from their home in Mount Hyono where his mom resides, so Rikichi often runs errands between them and tries to persuade his father to visit more frequently.