Demon Slayer Season 4 Episode 3 — “A Sword from Over 300 Years Ago” — reviewed in full Kagex format. Hub: Demon Slayer: Kimetsu no Yaiba. Previous: Season 4 Episode 2 — Yoriichi Type Zero.
Hook
People search demon slayer episode 3 review when they want a straight answer: worth watching, what changes, and how it scores — without a random spoiler dump. “A Sword from Over 300 Years Ago” is overall TV slot 47 (Swordsmith Village Arc). “A Sword from Over 300 Years Ago” moves Tanjiro’s compassion test forward without resetting Nezuko’s stake. Yoriichi Type Zero is destroyed at the end of Tanjiro‘s training, but a sword from over 300 years ago appears from insid…
Spoiler-free top half; deep recap after the warning. Character links go to live guides where they exist.
Quick Information
- Anime: Demon Slayer: Kimetsu no Yaiba
- Season / Episode: Season 4, Episode 3 (overall #47)
- English title: A Sword from Over 300 Years Ago
- Arc: Swordsmith Village Arc
- Runtime: ~24 minutes
- Studio: ufotable
- Original air date: April 23, 2023
- Kagex score: 9.2 / 10
- Where to watch legally: Crunchyroll / Netflix (region-dependent)
- Characters: Tanjiro Kamado, Nezuko Kamado
Should You Watch It?
Worth it? Yes if you are on the Demon Slayer track in order. “A Sword from Over 300 Years Ago” is load-bearing for Swordsmith Village Arc, not clip fodder. Score 9.2/10 reflects this hour’s craft and emotional turn.
Beginner-friendly? Only after earlier episodes. Open Episode 1 first.
Who bounces? Viewers who want zero training or dialogue — ufotable still spends minutes on breath forms, corps politics, and Tanjiro’s empathy.
Spoiler Warning
Spoilers for Season 4 Episode 3 (“A Sword from Over 300 Years Ago”) follow. Stop above for a clean first watch. No later-arc spoilers beyond this episode’s end.
Story Recap
Ordinary Life
Yoriichi Type Zero is destroyed at the end of Tanjiro‘s training, but a sword from over 300 years ago appears from inside.
Kagex beat note: “A Sword from Over 300 Years Ago” uses ordinary life inside Swordsmith Village Arc. Tanjiro’s kindness is tested as corps rules, demon tricks, or hashira standards tighten. This recap stays inside Season 4 Episode 3 — no Infinity Castle spoilers.
Unexpected Incident
Kotetsu gives Tanjiro the sword; however, it is badly rusted.
Kagex beat note: “A Sword from Over 300 Years Ago” uses unexpected incident inside Swordsmith Village Arc. Tanjiro’s kindness is tested as corps rules, demon tricks, or hashira standards tighten. This recap stays inside Season 4 Episode 3 — no Infinity Castle spoilers.
Escalation
At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down within his family line.
Kagex beat note: “A Sword from Over 300 Years Ago” uses escalation inside Swordsmith Village Arc. Tanjiro’s kindness is tested as corps rules, demon tricks, or hashira standards tighten. This recap stays inside Season 4 Episode 3 — no Infinity Castle spoilers.
First Discovery
Meanwhile, the presence of demons is inching closer to the village…
Kagex beat note: “A Sword from Over 300 Years Ago” uses first discovery inside Swordsmith Village Arc. Tanjiro’s kindness is tested as corps rules, demon tricks, or hashira standards tighten. This recap stays inside Season 4 Episode 3 — no Infinity Castle spoilers.
Important Encounter
Yoriichi Type Zero is destroyed at the end of Tanjiro‘s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rusted. At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down within his family line. Meanwhile, the presence of demons is inching closer to the village…
Kagex beat note: “A Sword from Over 300 Years Ago” uses important encounter inside Swordsmith Village Arc. Tanjiro’s kindness is tested as corps rules, demon tricks, or hashira standards tighten. This recap stays inside Season 4 Episode 3 — no Infinity Castle spoilers.
Story Analysis
ufotable’s Season 4 Episode 3 board prioritizes readable faces when breath styles stack VFX. “A Sword from Over 300 Years Ago” (Swordsmith Village Arc) assumes you know why Nezuko’s box matters and why Tanjiro will not treat demons as faceless mobs — that moral friction is the series engine, not a mid-season lecture.
Kagex story score 9.2 for this hour only: Yoriichi Type Zero is destroyed at the end of Tanjiro‘s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rus… Compare with binge pace vs weekly 2019–2024 drops — the episode was designed as a chapter, not a clip montage.
Animation 8.9: water, flame, sound, and mist breathing all have distinct color scripts. When the episode goes quiet (training, travel, recovery), composition carries threat — cursed wisteria, crow reports, Corps rank badges.
ufotable’s Season 4 Episode 3 board prioritizes readable faces when breath styles stack VFX. “A Sword from Over 300 Years Ago” (Swordsmith Village Arc) assumes you know why Nezuko’s box matters and why Tanjiro will not treat demons as faceless mobs — that moral friction is the series engine, not a mid-season lecture.
Kagex story score 9.2 for this hour only: Yoriichi Type Zero is destroyed at the end of Tanjiro‘s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rus… Compare with binge pace vs weekly 2019–2024 drops — the episode was designed as a chapter, not a clip montage.
Animation 8.9: water, flame, sound, and mist breathing all have distinct color scripts. When the episode goes quiet (training, travel, recovery), composition carries threat — cursed wisteria, crow reports, Corps rank badges.
ufotable’s Season 4 Episode 3 board prioritizes readable faces when breath styles stack VFX. “A Sword from Over 300 Years Ago” (Swordsmith Village Arc) assumes you know why Nezuko’s box matters and why Tanjiro will not treat demons as faceless mobs — that moral friction is the series engine, not a mid-season lecture.
Kagex story score 9.2 for this hour only: Yoriichi Type Zero is destroyed at the end of Tanjiro‘s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rus… Compare with binge pace vs weekly 2019–2024 drops — the episode was designed as a chapter, not a clip montage.
Animation 8.9: water, flame, sound, and mist breathing all have distinct color scripts. When the episode goes quiet (training, travel, recovery), composition carries threat — cursed wisteria, crow reports, Corps rank badges.
Character Analysis
Tanjiro Kamado still leads — even when hashira or sound pillars dominate screen time, the episode tests whether his compassion survives corps doctrine. Nezuko remains the moral anchor in the box.
Supporting cast this hour should feel like people with jobs (corps guides, demons with backstory, civilians in Yoshiwara or the village). Kagex does not invent manga-only scenes to pad word count.
World Building
Demon Slayer Corps ranks, wisteria, Nichirin swords, and breathing styles advance in Season 4. “A Sword from Over 300 Years Ago” adds Swordsmith Village Arc rules — how missions are assigned, what “twelve kizuki” pressure feels like on the ground, and how ufotable stages Taisho-era Japan without modern anachronism.
Animation
ufotable on TV: particle-heavy breath effects, 2D faces held long enough to read grief. Animation score 8.9 for this episode’s peaks vs dialogue coverage.
Music & Voice Acting
Score 9.1. “Kizuna no Kiseki” (MAN WITH A MISSION × milet) pairs action pop with village forge smoke — swordsmith arc energy. Japanese track is reference (Natsuki Hanae, Akari Kito, Hiro Shimono, Yoshitsugu Matsuoka).
Hidden Details
- Crow messengers and Kasugai squares are logistics, not cute mascot filler.
- Check Tanjiro’s nose reactions — smell is plot data in Kimetsu.
- Episode title kanji often foreshadows the internal lesson (“A Sword from Over 300 Years Ago”).
- No manga chapter homework required for this page.
Best Moments
- Yoriichi Type Zero is destroyed at the end of Tanjiro‘s training, but a sword from over 300 years ago appears from inside.
- Kotetsu gives Tanjiro the sword; however, it is badly rusted.
- At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down within his family line.
- Meanwhile, the presence of demons is inching closer to the village…
Pros & Cons
Pros: Specific to “A Sword from Over 300 Years Ago”; ufotable craft; emotional through-line for Tanjiro/Nezuko.
Cons: Requires sequential viewing; power-scaling debates start heavy in later seasons — not this page’s job to settle.
Final Verdict
Kagex overall: 9.2 / 10
- Story: 9.2
- Characters: 9.1
- Animation: 8.9
- Music: 9.1
- Enjoyment: 9.1
“A Sword from Over 300 Years Ago” moves Tanjiro’s compassion test forward without resetting Nezuko’s stake. Yoriichi Type Zero is destroyed at the end of Tanjiro‘s training, but a sword from over 300 years ago appears from insid…
What to Expect Next
Next: Season 4 Episode 4 (“Thank You, Tokito”). Sequential viewers should continue.
FAQ
Do I need Season 4 Episode 3?
Yes in order. Skipping “A Sword from Over 300 Years Ago” leaves gaps Swordsmith Village Arc assumes filled.
English title?
“A Sword from Over 300 Years Ago” (Fandom / streaming listings).
When did it air?
April 23, 2023 · ufotable · ~24 min.
Is this filler?
No. Demon Slayer’s slower hours are training, travel, or recovery with payoffs.
Overall episode number?
47 of 63 TV episodes across five seasons.
Character guides?
Facts & spoilers hub?
Keep exploring
- Demon Slayer hub
- Season 4 review
- Overall review
- Previous: Season 4 Episode 2 — Yoriichi Type Zero
- Next: Season 4 Episode 4 — Thank You, Tokito
- Browse
Your turn
Did “A Sword from Over 300 Years Ago” earn your continue button? Favorite frame or line?
Sources: Kimetsu no Yaiba Wiki (Fandom) synopses; ufotable / Aniplex credits.
Kagex extended note on “A Sword from Over 300 Years Ago”: Yoriichi Type Zero is destroyed at the end of Tanjiro’s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rusted. At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down … Demon Slayer succeeds when action serves Tanjiro’s refusal to dehumanize victims — even demons with tragic backstories. That ethic is tested again in Swordsmith Village Arc without undoing earlier choices.
Kagex extended note on “A Sword from Over 300 Years Ago”: Yoriichi Type Zero is destroyed at the end of Tanjiro’s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rusted. At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down … Demon Slayer succeeds when action serves Tanjiro’s refusal to dehumanize victims — even demons with tragic backstories. That ethic is tested again in Swordsmith Village Arc without undoing earlier choices.
Kagex extended note on “A Sword from Over 300 Years Ago”: Yoriichi Type Zero is destroyed at the end of Tanjiro’s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rusted. At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down … Demon Slayer succeeds when action serves Tanjiro’s refusal to dehumanize victims — even demons with tragic backstories. That ethic is tested again in Swordsmith Village Arc without undoing earlier choices.
Kagex extended note on “A Sword from Over 300 Years Ago”: Yoriichi Type Zero is destroyed at the end of Tanjiro’s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rusted. At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down … Demon Slayer succeeds when action serves Tanjiro’s refusal to dehumanize victims — even demons with tragic backstories. That ethic is tested again in Swordsmith Village Arc without undoing earlier choices.
Kagex extended note on “A Sword from Over 300 Years Ago”: Yoriichi Type Zero is destroyed at the end of Tanjiro’s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rusted. At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down … Demon Slayer succeeds when action serves Tanjiro’s refusal to dehumanize victims — even demons with tragic backstories. That ethic is tested again in Swordsmith Village Arc without undoing earlier choices.
Kagex extended note on “A Sword from Over 300 Years Ago”: Yoriichi Type Zero is destroyed at the end of Tanjiro’s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rusted. At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down … Demon Slayer succeeds when action serves Tanjiro’s refusal to dehumanize victims — even demons with tragic backstories. That ethic is tested again in Swordsmith Village Arc without undoing earlier choices.
Kagex extended note on “A Sword from Over 300 Years Ago”: Yoriichi Type Zero is destroyed at the end of Tanjiro’s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rusted. At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down … Demon Slayer succeeds when action serves Tanjiro’s refusal to dehumanize victims — even demons with tragic backstories. That ethic is tested again in Swordsmith Village Arc without undoing earlier choices.
Kagex extended note on “A Sword from Over 300 Years Ago”: Yoriichi Type Zero is destroyed at the end of Tanjiro’s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rusted. At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down … Demon Slayer succeeds when action serves Tanjiro’s refusal to dehumanize victims — even demons with tragic backstories. That ethic is tested again in Swordsmith Village Arc without undoing earlier choices.
Kagex extended note on “A Sword from Over 300 Years Ago”: Yoriichi Type Zero is destroyed at the end of Tanjiro’s training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword; however, it is badly rusted. At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down … Demon Slayer succeeds when action serves Tanjiro’s refusal to dehumanize victims — even demons with tragic backstories. That ethic is tested again in Swordsmith Village Arc without undoing earlier choices.
