Kaiju No. 8, crafted by Naoya Matsumoto, takes a bold step away from traditional shonen narratives by featuring adult protagonists. This unique approach is a major factor behind the series’ growing popularity. If you’re intrigued by Kafka Hibino’s quest to combat kaijus, you’re probably wondering about the ages of your favorite characters. In this guide, we’ll explore the ages of key figures from Kaiju No. 8, including Kafka, Kikoru, and Reno.
How Old Are the Main Characters in Kaiju No. 8?
Before we dive in, it’s worth noting that while some ages have been clarified by Matsumoto, others are based on context and character descriptions. Let’s explore the ages of the main characters in Kaiju No. 8:
1. Kafka Hibino – 32 Years Old
In a genre known for teenage heroes, Kafka Hibino stands out as a 32-year-old protagonist questioning his life’s direction. Unlike typical young aspirants, Kafka is a relatable figure navigating dreams and responsibilities while striving to protect humanity alongside his childhood friend.
2. Reno Ichikawa – 18 Years Old
Every shonen title features a loyal sidekick, and in Kaiju No. 8, that role is filled by the 18-year-old Reno Ichikawa. Eager to prove himself, he works tirelessly towards becoming an elite officer in the Defense Force.
3. Kikoru Shinomiya – 16 Years Old
A fierce female character is essential in any shonen narrative. At just 16 years old, Kikoru Shinomiya, daughter of a prominent Defense Force leader, proves her strength as one of the toughest fighters. Despite her youth, she remains determined to honor her mother’s legacy.
4. Mina Ashiro – 27 Years Old
Kafka’s aspiration to stand with his childhood friend is realized through Mina Ashiro, who serves as the captain of the Defense Force’s Third Division at 27 years old. Together, they share the ambition to eliminate the kaiju threat once and for all.
5. Soshiro Hoshina – 25-29 Years Old
Soshiro Hoshina, the dynamic vice captain of the Third Division, projects an aura similar to legendary characters like Levi from Attack on Titan. While his exact age hasn’t been disclosed, many fans speculate he is between 25 and 29 years old, sharing the goal of proving himself to a doubting world.
6. Isao Shinomiya – Around 50 Years Old
Isao Shinomiya, Kikoru’s father, serves as the Director General of the Defense Force. Based on his daughter’s age, it’s reasonable to estimate him to be around 50 years old in Kaiju No. 8. His fierce dedication drives him to fight for humanity’s future.
7. Kaiju No. 9 – Age Unknown
As the primary antagonist of the series, Kaiju No. 9 represents an unknown threat whose age and origins remain shrouded in mystery. Its elusive nature hints at a long-standing existence, making it a formidable adversary.
8. Gen Narumi – 27 Years Old
Gen Narumi, known as Japan’s strongest anti-kaiju combatant, is likely 27 years old, based on his association with Mina Ashiro. His combination of skills and charismatic personality makes him a fan favorite, further enriching the series’ dynamic.
9. Iharu Furuhashi – Around 19 Years Old
Iharu Furuhashi, inspired by Mina’s heroics during a kaiju attack, has not had his age officially stated. However, he is estimated to be around 19 years old, indicating a strong desire to follow in the footsteps of his idol.
10. Aoi Kaguragi – Around 19 Years Old
Aoi Kaguragi, another rising star in the Defense Force alongside Kikoru and Reno, is also estimated to be around 18 to 19 years old. His backstory as a potential JGSDF candidate adds layers to his character.
11. Haruichi Izumo – 18-20 Years Old
Haruichi Izumo, heir to one of Japan’s wealthiest families and an esteemed anti-kaiju arms manufacturer, surprisingly chooses to fight as a Defense Officer. While the specifics of his age haven’t been disclosed, he is likely between 18 and 20 years old, aligning him with his peers.
12. Hakua Igurashi – 18-20 Years Old
Hakua Igurashi, recommended by her sister to join the Defense Force, falls into the age range of 18 to 20 years old, similar to her fellow recruits. Her journey reflects the commitment of youth in facing formidable challenges.
The Kaiju No. 8 manga came to a close in July 2025, leaving some character details unaddressed. With several ages still a mystery, which character resonates with you the most? Dive into the comments below and let us know!
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