Aizawa Shota is a character in the popular anime and manga series My Hero Academia, created by Kohei Horikoshi. He is a pro hero and a teacher at U.A. High School, where he mentors students in the use of their Quirks and prepares them for the challenges of being a hero.

Despite his stern and serious demeanor, Aizawa is a beloved character among fans of the series, known for his dry wit, quick reflexes, and unyielding dedication to his students and to the cause of heroism.
While the exact birth year of Aizawa Shota is not explicitly stated in the series or in official materials, it is possible to make an educated guess based on available information.
In the My Hero Academia series, Aizawa is depicted as an experienced pro hero who has been active in the field for several years. He is shown to have been a member of the same class as fellow pro heroes Present Mic and Eraser Head (his hero name), and to have trained under the same teacher, the hero Snipe.
Based on this information, it is likely that Aizawa was born sometime in the mid to late 1980s, as this would place him in the same generation as other pro heroes who are known to be in their late 20s or early 30s, such as Todoroki Shoto and Bakugo Katsuki.
However, without any explicit confirmation from the creator or official sources, it is impossible to know for certain the exact birth year of Aizawa Shota.
In conclusion, while the exact birth year of Aizawa Shota is not explicitly stated in the My Hero Academia series or in official materials, it is likely that he was born sometime in the mid to late 1980s based on his status as an experienced pro hero who is part of the same generation as other heroes who are known to be in their late 20s or early 30s.