You’ve seen him parrying the Musou no Hitotachi or just chilling on the Beidou’s ship, but if you actually stop to think about it, how old is Kazuha? It’s a question that keeps the Genshin Impact community in a chokehold because, let’s be honest, HoYoverse hates giving us straight numbers. They give us birthdays, sure. June 29th. Mark your calendars. But the birth year? Absolute radio silence.
To figure out Kazuha’s age, you have to play detective with the lore snippets buried in weapon descriptions and those emotional cutscenes that made us all cry. Honestly, if you just go by his "teen" model in-game, you might think he’s a kid. He’s not. He’s definitely an adult, or at the very least, right on the cusp of it by Teyvat’s standards.
The Drinking Age Theory and Inazuma Law
Here’s the thing about Inazuma: it’s heavily based on Edo-period Japan. In real-world Japan, the legal drinking age is 20. Now, there’s this specific interaction in the game where Kazuha talks about wine. He doesn't just talk about it; he knows his stuff. He’s a connoisseur of the "finer things" while living as a wandering ronin.
In one of the Uyuu Restaurant message boards, there’s a note left by a "young man" (implied to be Kazuha) complaining about the regulations. The owner basically calls him out, suggesting he’s still a couple of years away from being legally allowed to drink.
If we assume the Vision Hunt Decree started about a year before the Traveler arrived, and Kazuha was already wandering for a while before that, the timeline starts to firm up. Most lore hunters pin him at 18 to 22 years old.
2-word sentence: He’s grown.
Why He Feels Older Than He Looks
Kazuha has what I call "Trauma Maturity." He’s the last scion of the Kaedehara Clan. That’s not just a fancy title; it means he watched his family’s legacy crumble into nothing. He didn't just inherit a sword; he inherited a mountain of debt and a dying reputation.
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Think about the timeline for a second:
- His grandfather was part of the Raiden Gokuden decline.
- His father died when Kazuha was still relatively young, leaving him to handle the clan's final dissolution.
- He spent years as a wanderer before the Vision Hunt Decree even began.
- He witnessed the execution of his best friend, Tomo.
When you pack that much life experience into a person, they’re going to sound like a 50-year-old poet even if they still have the face of a college freshman. Kazuha isn’t "young" in the way Bennett or Chongyun are young. He’s a "young man," a term often used in the Chinese and Japanese scripts (seinen or shàonián in certain contexts) that differentiates him from the actual children like Klee.
Comparing Kazuha to the Rest of the Cast
If you look at the height models, Kazuha shares the medium male body type with characters like Xiao, Albedo, and Lyney. But age in Genshin is a trap. Xiao is thousands of years old. Albedo is a synthetic human. Kazuha, however, is purely human. No adepti blood. No immortality.
He’s roughly the same age as Ayaka and Yoimiya. Ayaka’s family tragedy also happened about ten years before the game’s current timeline. She was a child when it started; now she’s the "Shirasagi Himegimi." Kazuha fits right into that same generation. They are the young adults of Inazuma who had to step up because the previous generation failed or died.
Basically, he’s a man who has lived a lot of life in a very short span of time.
The Verdict on Kazuha's Age
While HoYoverse will probably never put "20 years old" in his character profile, the evidence points to a specific range. He is old enough to travel the world alone, old enough to be a key member of a pirate crew (The Crux), and old enough to carry the weight of a dead friend's ambition.
Most community consensus and lore-based estimates land him at 19 or 20.
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He’s not a teenager stuck in a rebellious phase. He’s a man who chose freedom over a suffocating nobility. That kind of decision usually comes when you’ve matured enough to realize that a fancy house isn't worth a trapped soul.
Actionable Insights for Lore Lovers
If you want to keep digging into the timeline, pay close attention to the "Irodori Festival" lore and the "Kasansen" story. These events specifically detail the downfall of the Kaedehara clan and provide the best context for how much time has passed since Kazuha was a "young master" in a manor. You can also cross-reference his stories with Beidou’s—since she’s clearly an established adult (likely late 20s), and she treats him more like a peer or a highly respected younger brother than a child.
Keep an eye on any mentions of "ten years ago" in Inazuman world quests. That seems to be the "sweet spot" for when the major shift in Kazuha's life began, marking his transition from a protected child of the gentry to the wind-chasing samurai we know today.