---
title: "Kokushibou Sword — $3K/mo Amazon US Product Research (2026)"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/kokushibou-sword"
last_updated: "2026-08-12T18:43:48.901Z"
locale: en
meta:
description: "Amazon product research for kokushibou sword: $3K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for kokushibou sword: $3K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Kokushibou Sword — $3K/mo Amazon US Product Research (2026)"
---
# **Kokushibou Sword**
**Skip it**
A small market ($41K/yr) — this niche doesn't clear our bar today.
Market size 10Growth 16Conversion 26Competition 22Returns 69Price range 78Avg price 92Brand share 48Review moat 53Quality gap 28
**Avg price**
**Great****$52.03**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$20.03–$121.09**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Good****2.2%**
return rate — above 5% kills the launch gate
**Review moat**
**Good****1,396.92**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****76%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Okay****2.1%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Bad****74%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-18.0%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$41K**
$41K/yr · 38K searches
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
## **Is kokushibou sword profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, kokushibou sword is a $41K/yr Amazon United States market (38K searches/yr). The top 5 brands hold 76% of demand. Verdict: Skip it — 36/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **kokushibou sword market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **500–750**
- avg 0–100/product
- **Revenue / yr**
- **$26K–$39K**
- units × avg price
- **Conversion rate**
- **2.1%**
- **Avg BSR**
- **#587**
- **Page quality**
- **0%**
- **Prime**
- **92%**
- **Sponsored**
- **92%**
- **Out of stock**
- **13.5%**
- **Avg brand age**
- **32 months**
- **Avg seller age**
- **227 days**
## **Competition: brands, sellers & click share**
The top 5 products capture 74% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**11 **▲rising
**Sellers**
**13**
**Top-5 brand share**
**76%**
Top 20: 100%
**Top-5 click share**
**74%**
Top 20: 100%
**Open market**
**16%**
- SV34% - Sword fort13% - Sword Valley11% - Zisu10% - Jorumo9% - Cold Blade7% - Open — no brand owns it (5 brands, 16%)
## **kokushibou sword demand & seasonality**
Weekly Amazon search volume, last 33 weeks — -18.0% search growth over the last 90 days.
1K600Black Friday '25Holiday '25Spike '26Nov '25Dec '25Feb '26Mar '26Apr '26May '26Jun '26
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/kokushibou-sword/trend)
## **Top kokushibou sword products & what they sell for**
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%$4K20%$8K30%$12K40%$16K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted
All 13 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**SV Anime Sword Cosplay Kokushibo Sword Katana 41 InchCollectible Gifts**SV**$37.15**4.6★2,937 rev](https://www.amazon.com/dp/B09WR9YDBR) [2**Sword fort Handmade Katana Anime Cosplay Sword Stainless Steel Demon Sword Real Metal-Kokushibou**Sword fort**$45.85**4.6★2,790 rev](https://www.amazon.com/dp/B08HMP9VNW) [3**Sword Valley Kokushibou/Tsugikuni Michikatsu Sword - Slayers Katana40.9 LengthAnime Original Texture Carbon Steel Blade Carving SymbolNon-Slip Gripfor Cosplay & Display**Sword Valley**$40.79**4.5★1,793 rev](https://www.amazon.com/dp/B087M3HJ34) [4**Jorumo Sword Building Set 39in Kokushibo Sword Building Block with Scabbard and Stand Handmade Cosplay Anime Sword Toy Building Set for Collecting and Gifting 789 pcs**Jorumo**$39.21**4.5★801 rev](https://www.amazon.com/dp/B0BMXNSLQ6) [5**Cold Blade Anime Sword - 41 inches Anime Katana Replica with Belt and Stand - Heisimou**Cold Blade**$31.93**4.4★551 rev](https://www.amazon.com/dp/B0BY6KK8GP)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Kokushibo Demon Slayer Sword and Scabbard**BUDK**$66.80**0 rev3mo ago](https://www.amazon.com/dp/B0GTBXSXVF) [**Runoshi Demon Slayer Collection Katana 40.5-Inch Carbon Steel Samurai Sword Real Katana Swords Cosplay Replica Handmade (Kokushibou)**Runoshi**$121.09**1 rev11mo ago](https://www.amazon.com/dp/B0FLYJ46SS) [**Demon Slayer Inspired Japanese Katana Hand Forged Carbon Steel Blade Lacquered Scabbard Anime Collectible - Kokushibo**MN Sword**$117.03**1 rev11mo ago](https://www.amazon.com/dp/B0FHQC6PKS) [**Zisu LED Glowing Anime Cosplay Sword Kokushibo Sword - 40 Inch Rechargeable Light Up Sword with Stand & Belt**Zisu**$44.76**82 rev1y ago](https://www.amazon.com/dp/B0DZBW1XSW) [**RENGENG Light Up Kokushibo Sword 40 Inches Rechargeable Plastic Anime Replica with Belt & Stand Original Texture Anime Sword**RG RENGENG**$46.91**948 rev1y ago](https://www.amazon.com/dp/B0DBKY5N6D)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Kokushibo Demon Slayer Sword and Scabbard**BUDK**$66.80**0.0★**▲ 1000%**](https://www.amazon.com/dp/B0GTBXSXVF) [**Runoshi Demon Slayer Collection Katana 40.5-Inch Carbon Steel Samurai Sword Real Katana Swords Cosplay Replica Handmade (Kokushibou)**Runoshi**$121.09**5.0★**▲ 517%**](https://www.amazon.com/dp/B0FLYJ46SS) [**Zisu Kokushibo Sword - 23.6 Short Katana Replica for Kids - Complete with Belt Stand and True-to-Show Design - Kokushibo Sword Ideal for Display**Zisu**$20.03**4.4★**▲ 20%**](https://www.amazon.com/dp/B0BZVHGLWB) [**Zisu Anime Kokushibo Sword About 41 inches Hashira Pillars & Protagonist Sword Anime Original Texture (Purple-Kokushibou)**Zisu**$35.12**4.6★**▲ 14%**](https://www.amazon.com/dp/B08YJW5H7N) [**Kokushibou Sword. Demon Slayer Sword Kokushibou Katana -41 inchfor Role-Playing and Collection.Anime Original Texture**PZOEWUESR**$29.80**4.5★**▲ 10%**](https://www.amazon.com/dp/B0B1V86NFZ)
**~~View all trending →~~**
## **What reviews say buyers love and hate about kokushibou sword**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Material Quality**21%
*“Its alright made out of plastic cheap so thats fine”*
**Adhesion/Stickiness**14%
*“Really nice once it put together I would glue it”*
**Value For Money**14%
*“Awesome stuff and cheaper than Lego by $40 bucks”*
**Fun/Entertainment Experience**14%
*“W katana fun”*
**Gifting Purpose**7%
*“Good gift”*
**Quality-Overall**7%
*“It is a decent product”*
### **What buyers complain about **
**Assembly/Installation**13%
*“A little hard to put together”*
**Material Quality**13%
*“The plastic quality is poor”*
**Size-Overall**13%
*“the size is significantly smaller than anticipated”*
**Durability**13%
*“it broke a little bit trying to put it together other than that it is a somewhat good product”*
**Ease Of Use**13%
*“those were a little hard to put in”*
### **Top return reasons **
**Defective Material/Parts**21%
**Instructions/User Manual/Troubleshooting**11%
**Assembly/Installation**10%
**Material Quality**6%
**Durability**6%
**Adhesion/Stickiness**6%
**Charging**5%
**Color**5%
**Advertised Vs Actual Product**5%
**Compatibility-Overall**3%
## **Common kokushibou sword questions**
- **Is kokushibou sword profitable to sell on Amazon United States?**
- The niche generates $41K/yr across 13 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -18.0%. Flapen's verdict: Skip it (36/100).
- **How competitive is the kokushibou sword niche?**
- 11 brands and 13 sellers compete. The top 5 products take 74% of clicks and top 5 brands hold 76% of demand.
- **What do buyers complain about in kokushibou sword?**
- Top complaints mined from reviews: Assembly/Installation, Material Quality, Size-Overall. The return rate is 2.2%.
- **What does it cost to enter the kokushibou sword niche?**
- Listings span $20.03–$121.09; the average listing price is $52.03 (sweet spot $15–$100). The average incumbent carries 1,397 reviews — the moat a new listing must climb.
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