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⚡ 132 blades claimed in the last 24 hours

🔥 Selling fast — the launch sale ends tonight

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 4.9/5 (113 reviews)

🗡️ Closed: a real-deal katana on your back — molded hilt + carry sleeve

☔ Open: full-size auto-open umbrella (~105 cm canopy, 16 ribs, rain + UV)

🚚 Free worldwide shipping + 30-day guarantee
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$5.00
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🚚 Free worldwide tracked shipping — typically 6–12 days · 📦 30-day money-back guarantee

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I've bought a lot of anime merch that looked better online than in my hands. This is the opposite. The hilt has real weight, the sleeve sits on your back like an actual saya, and when the rain starts, the whole bus stop watches you unsheathe an umbrella. Peak fiction, real life. Already eyeing a second character.

Devon C.

Closed: ~88 cm (34.6") — real katana length, hilt included. That's the whole illusion. Open: ~105 cm canopy, full-size coverage for you and your backpack.

Carry it two ways: slung on your back in the included sleeve with shoulder strap, or in hand like a cane between downpours.

Pongee canopy with rain + UV protection, ~16 fiberglass/metal ribs, one-press auto-open, molded ABS tsuka hilt with tsuba guard and fabric-wrapped grip, plus the carry sleeve with shoulder strap.

Care: shake it out and let it dry open before it goes back in the sleeve. That's it.

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Quick Answers

Every order ships free worldwide with tracking — typically 6–12 days door to door. You'll get a tracking number by email the moment it ships.

Closed: ~88 cm (34.6") — real katana length, which is exactly why the on-your-back illusion works. Open: a full-size ~105 cm canopy with ~16 ribs.

See the draw

Photos don't capture it. The sleeve on your back, the hilt over your shoulder, the auto-open snapping the canopy out like a special move — here's the full lineup in motion, exactly as it arrives.

Still wondering? We've got you

100%. Fiberglass/metal ribs, a pongee canopy with rain + UV protection, and one-press auto-open. It's a genuine daily umbrella that happens to look like a katana on your back.

No — RainSlayer is an independent fan brand, not affiliated with or endorsed by the Demon Slayer franchise. Designed by fans, for fans.

You have 30 days from delivery for a full refund — just reach out through the contact page and we'll take care of you. (Something tells us it's staying on your back.)

Claimed by fans everywhere 🗡️

  • The illusion is REAL

    Wore it slung on my back to campus and three different people asked if I was carrying an actual katana. Then it started pouring and I just drew my blade. Cinema. Peak. No notes.

    Marcus

  • Goated. Zero regrets

    Got the Zenitsu and the lightning gradient goes even harder in person. The auto-open hits like a special move, and it's a legit full-size umbrella — sturdier than the boring one it replaced.

    Dre

  • My cosplay AND my commute

    The Shinobu butterfly print is gorgeous — way prettier than the photos. I use it every rainy day and it's survived some real storms. Con-ready and commute-ready. Certified W purchase.

    Kayla

    Our 30-Day Money-Back Guarantee

    If your blade isn't everything we promised, you have 30 days from delivery to return it for a full refund. Just reach out through the contact page — no hoops, no hassle. We're that confident it's a W.

    Not a costume prop. Your daily carry.

    You know the feeling — that scene, that breathing form, that blade. We made it something you can actually carry: your character's katana slung on your back, a full-size auto-open canopy the second the sky opens up. Main-character energy, every rainy day. RainSlayer is an independent fan brand — not affiliated with or endorsed by the Demon Slayer franchise. Just fans who wanted the blade IRL. 🗡️

    Close-up of the molded tsuba guard and fabric-wrapped katana hilt

    The hilt is the whole point

    Molded tsuka with a fabric-wrapped grip, a real tsuba guard, and a carry sleeve with shoulder strap that reads like a saya. Slung on your back, nobody's guessing it's an umbrella — until you draw it.

    What blade-claimers report after week one:

    (Unscientific. Extremely accurate.)

    100%

    Main-character energy in the rain

    The draw-from-the-back never misses.

    97%

    Say the katana illusion fools everyone

    Friends, strangers, con security — everyone looks twice.

    0%

    Regrets

    Certified W.