The world of My Hero Academia was created by none other than Kohei Horikoshi and it is a world where powerful Heroes and Villains live among society. While the villains try to create chaos with abilities known as Quirks, the Heroes try to stop them by using the same powers.
To train the Heroes, there are Hero Academies in My Hero Academia and, over the course of time, fans have been introduced to quite a few of them already. While they are all great in their own way, not all of them are equally as good, powerful, or prestigious.
4 Isamu Academy High School
Isamu Academy High School is, surprisingly, an anime-only high school that was introduced in My Hero Academia after the Cultural Festival arc. This high school might or might not exist in the manga, however, the fact that it just appeared in the anime makes it non-canon to the actual story. Nonetheless, this school is rather impressive and fans saw their students come to UA for a short while, where they got a good look at what it is like to study at the most prestigious school in Japan.
Isamu Academy High School might be non-canon, however, the students that it produced were surely very interesting. Their abilities were extremely great and their potential as Heroes is rather good as well. For instance, Romero, one of the students of Isamu Academy, had a Quirk called Zombie Virus. This Quirk allowed him to produce gas from his body which turned anyone who breathed it in into a mindless zombie for a while. Just like an actual zombie attack, this virus can be spread if the person infected bites another. Clearly, this is a Quirk with chaotic power and just goes to show that the students of Isamu Academy High School are very powerful.
3 Ketsubutsu Academy High School
Ketsubutsu Academy High School is one of the more well-known schools in My Hero Academia. It was introduced to the fans during the Provisional License Exam Arc and there, it was revealed that they have a very fierce rivalry with UA. Their students turned out to be more than just exciting and their powers were exceptional. Ketsubutsu Academy High School is among the most prestigious in Japan and the Hero aspirants that they have certainly exhibited that.
Fans got to see 3rd Year Students from Ketsubutsu Academy High School, which included Yo Shindo, Tatami Nakagame, Shikkui Makabe, and Itejiro Toteki. All of these students that the fans got to witness possess special powers and are unique in their own ways, however, Shindo was certainly in a league of his own when compared to others. He was revealed to have a powerful Quirk known as Vibrate and, as the name suggests, this Quirk allows him to produce vibrations. Using these vibrations, he can create quakes, which is an extremely dangerous ability. Thanks to having had this Quirk for a very long time, he has grown immune to his vibrations. Yet, the shockwaves that he can produce with his powers are tremendous. His ultimate move can create an earthquake so powerful that it shatters the ground underneath and causes large-scale destruction.
2 Shiketsu High School
Shiketsu Academy High School is one of the most interesting schools in Japan and fans are very well familiar with their students. At the same time, fans have developed a soft spot for them as these students have played a very special role even in the Final War. This academy isn't just for show and is believed to be the only Hero Academy known to give even UA a run for its money. As expected of such a school, the Hero aspirants there are known to be incredibly powerful. Every year, they produce a bunch of incredibly skilled Heroes and this just goes to show that they are in a league of their own when it comes to Hero schools in My Hero Academia.
Fans have already seen quite a few of their students, in their first and second year. Among the first years, the most notable one is Inasa, who fans know to have created a special bond with Shoto Todoroki. Fans have also seen quite a few second-year students, such as Camie, Seiji, and Nagamasa.
1 U.A. High School
Expectedly, U.A. High School is known to be the best Hero school in Japan for training young aspirants. This is the hero school where the majority of the story unfolds and the protagonists, Izuku Midoriya and his powerful friends study here. The U.A. High School has produced the most notable Heroes in My Hero Academia and will likely continue to do so in the future as well. Fans are already aware of the power that the school produces.
Just their students are known to be exceptional in every way. Despite being just first years, the likes of Deku, Bakugo, and Shoto are powerful enough to take on any dangerous villain. Their strength continues to grow and things don't just stop with them. There are also other incredible students across the many classes who have demonstrated their skill and power over the years. It goes without saying that UA is the greatest hero school in the story and even though academies such as Shiketsu can come close to it, they can truly never match up to it, overall.