The formal, polite honorific used when addressing someone who is an accomplished professional. doctors, teachers, professors, scientists, and other specialists are addressed in this way. Gifted individuals in the arts are also addressed in this manner, as in "Akemi-sensei created the great series known as Patlabor."
Japanese title used to refer to or address teachers, professionals such as doctors and lawyers, politicians, clergymen, and other authority figures. It is also used to show respect to someone who has achieved a certain level of mastery in an art form or some other skill: accomplished novelists, musicians, and artists are addressed with the title in this way; for example, Japanese manga fans refer to manga artist Osamu Tezuka as "Tezuka-sensei." Sensei is also one of the common Japanese martial arts titles.
The Sensei is a fictional character in the DC Comics Universe. He is a martial artist and sensei created by writer-artist Neal Adams as a villain to fight the hero Batman. He first appeared in Strange Adventures #215 (October 1968).