---
title: "Rengoku Sword — $52K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/rengoku-sword"
last_updated: "2026-08-11T02:09:59.339Z"
locale: en
meta:
description: "Niche score 38/100 · $52K/yr market · 80K searches/yr · $39.63 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · $52K/yr market · 80K searches/yr · $39.63 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Rengoku Sword — $52K/yr Amazon US Niche (2026) - Flapen"
---
# **rengoku sword**
**Skip it**
A small market ($52K/yr) — this niche doesn't clear our bar today.
Market size 13Growth 20Conversion 21Competition 32Returns 59Price range 91Avg price 95Brand share 40Review moat 51Quality gap 42
**Avg price**
**Incredible****$39.63**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$10.03–$98.62**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Good****2.6%**
return rate — above 5% kills the launch gate
**Review moat**
**Good****1,457.43**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Okay****81%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****66%**
top-5 click share — leaders hold, buyers still browse
**Conversion**
**Bad****1.6%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-9.2%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$52K**
$52K/yr · 80K searches
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United States niche tracking, rengoku sword is a $52K/yr Amazon United States market (80K searches/yr). The top 5 brands hold 81% of demand. Demand peaks in Sep–Oct–Nov–Dec. Verdict: Skip it — 38/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **rengoku sword market data**
- **Units sold / yr**
- **2K–3K**
- avg 100–250/product
- **Revenue / yr**
- **$79K–$99K**
- units × avg price
- **Conversion rate**
- **1.6%**
- **Avg BSR**
- **#195**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **86%**
- **Out of stock**
- **7.3%**
- **Avg brand age**
- **42 months**
- **Avg seller age**
- **203 days**
## **Competition & brand share**
The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**10 **▼falling
**Sellers**
**12**
**Top-5 brand share**
**81%**
Top 20: 100%
**Top-5 click share**
**66%**
Top 20: 100%
**Open market**
**19%**
- PZOEWUESR18% - Zisu17% - RG RENGENG15% - Sword Valley15% - Sword fort8% - SV8%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -9.2% search growth over the last 90 days.
5K3KSpike '24Prime Day '25Spike '25Holiday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct, Nov, Dec · busiest ÷ quietest = 6.1×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/rengoku-sword/trend)
## **Top rengoku sword search terms**
- **rengoku sword**68K/yr-8.2%1.9% conv. - **rengoku katana**6K/yr-3.8%0.7% conv. - **demon slayer rengoku sword**3K/yr-11.3%2.6% conv. - **rengoku sword metal**3K/yr-38.3%3.4% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/rengoku-sword/search-terms)
## **Top rengoku sword products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%4%$2K8%$4K12%$6K16%$8K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 14 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Rengoku Sword. Demon Slayer Sword -41 inchfor Role-Playing and Collection.Anime Original Texture**PZOEWUESR**$30.91**4.5★1,669 rev](https://www.amazon.com/dp/B09PYS5PNB) [2**RENGENG Light Up Rengoku Sword 40 Inches Rechargeable Plastic Anime Replica with Belt & Stand Original Texture Anime Sword**RG RENGENG**$47.46**4.6★948 rev](https://www.amazon.com/dp/B0DBKZ267Q) [3**Sword Valley Rengoku Kyoujurou Sword - Slayers Katana40.9 LengthAnime Original Texture Carbon Steel Blade Carving SymbolNon-Slip Gripfor Cosplay & Display**Sword Valley**$42.12**4.5★1,793 rev](https://www.amazon.com/dp/B084ZM95ZQ) [4**Zisu Anime Rengoku Sword About 41 inches Hashira Pillars & Protagonist Sword Anime Original Texture (Red-Kyoujurou)**Zisu**$33.97**4.6★6,362 rev](https://www.amazon.com/dp/B09B9DXM32) [5**Sword fort Handmade Katana Anime Cosplay Sword Stainless Steel Demon Sword Real Metal- Rengoku Kyoujurou**Sword fort**$45.29**4.6★2,790 rev](https://www.amazon.com/dp/B08HMMBX9N)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Zisu LED Glowing Anime Cosplay Sword Rengoku Sword - 40 Inch Rechargeable Light Up Sword with Stand & Belt**Zisu**$45.45**82 rev1y ago](https://www.amazon.com/dp/B0DZBS7GBR) [**RENGENG Light Up Rengoku Sword 40 Inches Rechargeable Plastic Anime Replica with Belt & Stand Original Texture Anime Sword**RG RENGENG**$47.46**948 rev1y ago](https://www.amazon.com/dp/B0DBKZ267Q) [**Zisu Rengoku Sword - 23.6 Short Katana Replica for Kids - Complete with Belt Stand and True-to-Show Design - Rengoku Sword Ideal for Display**Zisu**$20.04**225 rev3y ago](https://www.amazon.com/dp/B0BZVGZJM8) [**Rengoku Cosplay Sword Foam Props for Kids - 31 inch**PZOEWUESR**$29.43**840 rev3y ago](https://www.amazon.com/dp/B0BD4S6HL9) [**Full Tang Katana Rengoku Sword 41 Inches Samurai Sword Cosplay Anime Sword**wuton**$98.62**127 rev3y ago](https://www.amazon.com/dp/B0B8S9KQKX)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Anime Rengoku Hanafuda Earrings - Accessories for Kimetsu No Yaiba Cosplay**SONGCHANGJEWELRY**$10.03**4.6★**▲ 732%**](https://www.amazon.com/dp/B08SLW44FG) [**Sword Valley Rengoku Kyoujurou Sword - Slayers Katana40.9 LengthAnime Original Texture Carbon Steel Blade Carving SymbolNon-Slip Gripfor Cosplay & Display**Sword Valley**$42.12**4.5★**▲ 195%**](https://www.amazon.com/dp/B084ZM95ZQ) [**Demon Slayer Sword for Cosplay with Belt Holder Stand 41 inches (Rengoku Kyoujurou)**AN SWALLOW**$29.94**4.5★**▲ 121%**](https://www.amazon.com/dp/B09M5SWHCF) [**Zisu Anime Rengoku Sword About 41 inches Hashira Pillars & Protagonist Sword Anime Original Texture (Red-Kyoujurou)**Zisu**$33.97**4.6★**▲ 21%**](https://www.amazon.com/dp/B09B9DXM32) [**Rengoku Sword. Demon Slayer Sword -41 inchfor Role-Playing and Collection.Anime Original Texture**PZOEWUESR**$30.91**4.5★**▲ 13%**](https://www.amazon.com/dp/B09PYS5PNB)
**~~View all trending →~~**
## **What buyers say about rengoku sword**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**75%
*“the sheath is quality”*
**Value For Money**25%
*“Worth the money”*
### **What buyers complain about **
**Defective Material/Parts**33%
*“My son was so excited just to get an item that was broken”*
**Wood Quality**33%
*“Only buy if you what a piece of broken wood”*
**Durability**33%
*“Does not last”*
### **Top return reasons **
**Defective Material/Parts**18%
**Size-Overall**16%
**Quality-Overall**11%
**Color**8%
**Functionality-Overall**7%
**Handle Quality**7%
**Sharpness**5%
**Advertised Vs Actual Product**5%
**Grip**4%
**Material Quality**4%
## **Common questions**
- **Is rengoku sword profitable to sell on Amazon United States?**
- The niche generates $52K/yr across 14 tracked products. 90-day search growth is -9.2%. Flapen's verdict: Skip it (38/100).
- **How competitive is the rengoku sword niche?**
- 10 brands and 12 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 81% of demand.
- **What do buyers complain about in rengoku sword?**
- Top complaints mined from reviews: Defective Material/Parts, Wood Quality, Durability. The return rate is 2.6%.
- **When does demand for rengoku sword peak?**
- Demand peaks in Sep–Oct–Nov–Dec; the busiest month runs 6.1× the quietest.
- **What does it cost to enter the rengoku sword niche?**
- Listings span $10.03–$98.62; the average listing price is $39.63 (sweet spot $15–$100). The average incumbent carries 1,457 reviews — the moat a new listing must climb.
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