Solo Leveling became a global anime sensation almost immediately after arriving on Crunchyroll. Backed by the enormous popularity of its original web novel and manhwa, the series quickly attracted millions of viewers, broke streaming records and helped introduce a new generation of fans to anime.
Its spectacular animation, powerful protagonist and high-energy battles have made Solo Leveling one of the defining modern action anime.
However, there is another Crunchyroll series that deserves to be mentioned in the same conversation: Kaiju No. 8.
With explosive battles, comedy, emotional character moments, impressive animation and genuine tension, Kaiju No. 8 offers many of the qualities that made Solo Leveling such a phenomenon. In some areas, it arguably goes even further.
Kaiju No. 8 Brings Something Different to Shonen Anime
One of the biggest strengths of Kaiju No. 8 is its protagonist, Kafka Hibino.
Unlike the overwhelming majority of shonen heroes, Kafka is not a teenager discovering his potential for the first time. He is 32 years old and has already spent years watching his childhood ambitions slip away.
Kafka works as a professional kaiju cleanup specialist, dealing with the aftermath left behind after monsters are defeated. His real dream, however, is to join the Defense Force and fight kaiju alongside his childhood friend Mina Ashiro, who has risen to become Captain of the Third Division.
After repeatedly failing to enter the Defense Force, Kafka finally gets another opportunity when the enlistment age is increased. His life takes an even more dramatic turn when he unexpectedly gains the ability to transform into a kaiju himself.
This immediately creates one of the series’ biggest conflicts: Kafka finally gets the chance to become the hero he always wanted to be, but the very power that makes him special could also make him an enemy of the organisation he wants to serve.
Kafka Is More Than Just an Overpowered Hero
Another reason Kaiju No. 8 stands apart from many modern shonen series is that Kafka does not suddenly become unbeatable after receiving his powers.
Even without his kaiju transformation, he struggles to keep pace physically with other members of the Defense Force. Rather than making him useless, however, the story gives him another important advantage.
Years spent cleaning up kaiju corpses have given Kafka an extensive understanding of their anatomy. He uses that knowledge to help his teammates, proving that being valuable on the battlefield is about more than simply having overwhelming strength.
The series also gives its supporting characters meaningful opportunities to shine. The Defense Force members can carry entire sequences themselves instead of existing solely to support the protagonist.
That makes the ensemble feel much more complete.
Kaiju No. 8 Offers More Tension Than Solo Leveling
There are plenty of similarities between Kaiju No. 8 and Solo Leveling.
Both feature protagonists who begin as underdogs before gaining extraordinary abilities. Both deliver spectacular animated battles, rapid character growth and heroes who must conceal aspects of their true power.
But there is an important difference in how the two stories handle power.
Sung Jinwoo’s overwhelming strength often allows him to overcome obstacles with relatively little difficulty as his abilities continue to grow. Kaiju No. 8 takes a more uncertain approach with Kafka.
Every time Kafka reveals his kaiju abilities, there are serious consequences to consider. The Defense Force views kaiju as threats, meaning Kafka cannot simply use his powers without worrying about being discovered.
His enemies are also capable of challenging him, while his own abilities have limitations.
This creates genuine uncertainty whenever Kafka enters a dangerous situation.
The Supporting Cast Makes a Major Difference
Solo Leveling is heavily centred around Jinwoo’s progression from a weak hunter to one of the most powerful figures in his world. That transformation is a major part of its appeal, but it can also leave less room for the broader cast.
Kaiju No. 8 takes a different approach.
Characters surrounding Kafka receive their own moments, motivations and development. The members of the Defense Force aren’t simply there to watch Kafka solve every problem. Their individual abilities and struggles remain important to the story.
This also strengthens the emotional stakes. Viewers have reasons to care about what happens to the wider team rather than simply waiting to see how powerful Kafka becomes.
Kaiju No. 8 Is a Must-Watch for Shonen Fans
There is no denying Solo Leveling’s enormous impact. Its animation, action and satisfying power progression have made it one of the biggest modern anime franchises.
But Kaiju No. 8 offers a different kind of experience.
It combines monster action with comedy, character-driven storytelling and a protagonist whose age and circumstances immediately separate him from the traditional shonen formula. Kafka’s journey is not simply about becoming stronger—it is about getting another opportunity to achieve a dream he had already given up on while hiding a dangerous secret.
For viewers looking for high-quality action, stronger character development, meaningful tension and an unconventional protagonist, Kaiju No. 8 is absolutely worth watching.
Solo Leveling may have become one of Crunchyroll’s biggest anime hits, but Kaiju No. 8 proves that modern shonen can deliver just as much excitement while offering considerably more depth and uncertainty.