
07/29/2025
Why Morihei Ueshiba Was Called O‑Sensei.
In Japanese, “O-Sensei” (大先生) literally means “Great Teacher.”But this title was not something Morihei Ueshiba claimed for himself, it was a name given by his students and successors out of deep respect.
Ueshiba was more than a martial arts instructor:
• He embodied martial mastery, uniting weapon training and empty-hand techniques.
• He taught spiritual depth, seeing Aikido as a path of harmony and universal connection.
• He became a living example of discipline, compassion, and unwavering purpose.
For this reason, calling him O‑Sensei was not just about rank, it was an acknowledgment of his role as the founder and guiding spirit of Aikido.
A true title is not worn, it is earned through legacy.