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Globally, Sensei (先生 , Sensei , อาจารย์ ) is a common largely masculine, but uncommonly female first name. The forename Sensei is characteristic of China, where it is quite a rare mostly masculine, but infrequently feminine name, Japan, where it is a rare girly name, and Thailand, where it is a very rare unisex name. Also, Sensei is the last name as well as the forename.
Sensei is also a name for the fictitious and mythical characters: Sensei , the fictional super-villain and martial arts master, Gotham, season 3 and Sensei , the character in the Doraemon series.