It has been an ongoing debate for My Hero Academiafans whether the movie Heroes Rising is canon or not. In fact, if one tries to research it online, there are various threads and forums regarding this debate.
But before we answer the question of the movie being canon or not, the first thing that should be considered is this: what is a canon?
For those unfamiliar, canon is the body of work that is accepted as definitely true within the fictional universe. It could also be something that the creator did for the same series. This means that only the creators of the said fiction have the right to consider a movie or a special episode to be canon or not. Now, does the creator of My Hero Academia confirm the movie as canon? Let’s find out.
Is My Hero Academia: Heroes Rising Canon?

In an interview, Kohei Horikoshi discussed his involvement in My Hero Academia: Heroes Rising.
With this, fans can determine that yes, Kohei has an involvement in the movie and yes, the movie is canon.
Fans also have proof that the movie is canon since Shigaraki remembers Nine. It can be seen here:

Although there are still those who believe that the movie is not canon based on some concerns regarding how Deku handled his quirk in the movie and the series, by the end of the day, fans enjoyed the movie, and if the definition of canon is followed, then My Hero Academia: Heroes Rising is indeed canon.
In another news, fans can look forward to the release of My Hero Academia Season 5 soon.
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