Who is Sensei in Ninja?

Martial arts master and dojo leader, mentor to Casey and Namiko.

Who plays Sensei in Ninja?

Sensei is played by Togo Igawa.

Sensei's abilities include bushido philosophy, ninjutsu, teaching, combat strategy, honor.

Sensei has 4 mapped relationships in Ninja. Explore the interactive relationship map for details.

Sensei — Professional Student — Casey (Scott Adkins)
Sensei trains Casey and recognizes his development as a martial artist.

Casey is adopted into Sensei's dojo and earns Sensei's respect through perseverance and dedication to bushido.
Sensei — Family Father — Namiko (Mika Hijii)
Sensei is Namiko's father and dojo leader.

The plot identifies Namiko as Sensei's daughter and shows Sensei entrusting her with the Yoroi Bitsu.
Sensei — Professional Expelled Student — Masazuka (Tsuyoshi Ihara)
Their former mentor-student bond becomes a bitter institutional and personal conflict.

After Masazuka nearly kills Casey, Sensei expels him from the dojo and later rejects Masazuka's claim to succession.
Sensei — Social Friend — Professor Garrison (Garrick Hagon)
Their friendship enables the university refuge for the Yoroi Bitsu.

The plot explicitly describes Professor Garrison as Sensei's friend.