Mushoku Tensei: Japanese Fans Debate Why Its World Never Invented Guns
無職転生 なぜ銃がないのか、日本ファンの考察が白熱
A Mushoku Tensei reaction-compilation channel posted a video titled "the reason there are no guns in the Mushoku Tensei world is brutally severe," and 304 comments in, viewers are debating whether the obvious answer actually holds up. The top comment (395 likes) offers the bluntest version — the world already has swordsmen fast enough to dodge bullets — but replies immediately push back, pointing out that logic doesn't explain why slow, reloadable bows still exist either. From there the thread spirals into genre comparisons, franchise jokes about the show's signature Stone Cannon spell, and theories about what happens to the world's tech tree after the current cast is gone.
This titleJapanese reactions to Mushoku TenseiRead all 11 roundups on the title pageA Mushoku Tensei reaction-compilation channel, Anime-kun no Hannoushuu, posted a video titled "the reason there are no guns in the Mushoku Tensei world is brutally severe" — collecting comments from viewers reacting to that claim. It's a modest video, 304 comments, but the top comment gets straight to the most literal version of an answer.
“It's a world where there are actually a fair number of swordsmen who can move faster than a bullet, let alone get hit by one.”
銃弾当たらないどころか銃弾より速く動ける剣士がそこそこ居る世界だしな
That's the top comment on the whole video, and the reply right under it treats the whole premise as a bit of an anticlimax.
“More like that's literally just... 'the reason,' lol.”
本当の理由というか、そのままで草
From there, some viewers zoomed out to the genre logic behind it — arguing this isn't really a Mushoku Tensei problem so much as a rule about fantasy worlds in general.
“Honestly, in any story with magic in the setting, guns only really show up in the kind of world where just a handful of people can use magic to begin with.”
そもそも魔法とかがある世界観の物語で銃が出てくるのは一部の人しか魔法が使えない系のアニメぐらいだろ
Someone else turned that same logic into a bit, imagining how the show's three sword styles would each try to talk their way around a gun before the main character just skips the whole debate.
“Sword God Style: "Use the secret technique 'Light Blade' and you'll casually break the sound barrier." Water God Style: "Use the secret technique 'Flow' and you can nullify it." North God Style: "Oh — well, depending how you use it, could work!?" Rudy: "Let's just do a straightforward face-off, ready, set, go."”
剣神流「奥義『光の太刀』使えば音速は軽く超える」 水神流「奥義『流』使えば無効化できる」 北神流「おっ、使い方次第だけど使えるかも⁉︎」 ルディ「正面からよーいどんでお願いします」
Others reached for a comparison outside the isekai genre entirely, framing the whole question as one that shows up whenever a story hands its cast magic instead of technology.
“I mean, it's basically the same question as asking why Dragon Quest doesn't have firearms.”
まあドラクエに銃火器がない理由を聞いてるもんやし
Not everyone accepts the "swordsmen dodge bullets" answer as the whole story, though. One reply pokes a hole straight through it.
“If that's the entire explanation, then why do bows exist at all — they take forever to reload too.”
理由をそれだけですましちゃうなら装填に時間がかかる弓があるのがなんでってなっちゃう
That pushback opens the door for a more theoretical answer, one about what a gun actually removes from a fight rather than how fast it fires.
“Because nobody's realized that 'simplifying the intent to kill' is the real factor no one's accounting for.”
｢殺意の簡便化｣に誰も気付いていないから。
A handful of commenters just admitted the tangent had wandered somewhere else entirely, riffing on the show's own signature spell instead of guns at all — because apparently even a serious worldbuilding thread can't resist a Stone Cannon joke.
- “STONE CANNON!!! / everyone else: "what's that, is it food?"”👍2
- “Rock-cannon Gatling gun...”👍14
- “I love how that thing feels completely thoughtless about consequences. Dumb (as a compliment).”👍4
By the end, the thread stops trying to settle the debate and just starts guessing what happens after the story moves on from its current cast.
“After Rudeus is gone, I could see stone-cannon-type magic tools showing up through tech innovation, but actual firearms probably still won't — Roxy already solves the chantless-casting and mana-pool problems, so gunpowder just doesn't have much of a selling point.”
ルーデウスの死後なら技術革新でストーンキャン打てる魔導具とかは出そうだけど、銃火器類は多分出ないやろなぁ……ロキシーが無詠唱とか魔力総量問題も解決するし、あんまり火薬のメリットはなさそう……
That's how a video with a title promising a "brutally severe reason" ends up: not one clean answer, but 304 comments' worth of viewers building an entire in-world argument for why the genre they love just doesn't need guns to begin with.
FAQ
- What's the top theory for why Mushoku Tensei's world has no guns?
- The video's top comment (395 likes) argues it's simple: the world already has swordsmen fast enough to react to or outrun a bullet, so firearms wouldn't offer much of an edge.
- Do commenters agree with that explanation?
- Not entirely. A reply (15 likes) pushes back, pointing out that if speed alone explained the absence of guns, slow-to-reload bows shouldn't exist in the setting either — sparking further debate.
- What is this video actually reacting to?
- The channel Anime-kun no Hannoushuu posted a reaction-compilation video built around the claim that the in-world reason guns don't exist is "brutally severe," and collected viewer comments responding to that framing.
Mushoku Tensei: Is Rudeus Too Creepy to Watch? Fans Answer the Backlash
“I won't deny the protagonist is gross, but everything Rudeus has fought through to get where he is is genuinely cool, so I love him — I'm not denying the gross part.”
Read this roundupThis is one of 11 Japanese-reaction roundups for Mushoku Tensei. See them all →
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