---
title: "Rengoku — $127K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/home-kitchen/rengoku"
last_updated: "2026-08-10T05:20:30.152Z"
locale: en
meta:
description: "Niche score 39/100 · $127K/yr market · 417K searches/yr · $33.57 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 39/100 · $127K/yr market · 417K searches/yr · $33.57 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Rengoku — $127K/yr Amazon US Niche (2026) - Flapen"
---
# **rengoku**
**Skip it**
Weak search conversion (0.9%) — this niche doesn't clear our bar today.
Market size 29Growth 17Conversion 11Competition 23Returns 90Price range 75Avg price 95Brand share 37Review moat 74Quality gap 21
**Avg price**
**Incredible****$33.57**
avg listing price — sweet spot $15–$100
**Returns**
**Great****1.2%**
return rate — above 5% kills the launch gate
**Price range**
**Great****$10.03–$122.84**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****527.43**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****83%**
top-5 brand share — brands hold most of the demand
**Market size**
**Okay****$127K**
$127K/yr · 417K searches
**Competition**
**Bad****72%**
top-5 click share — a locked-up shelf
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-15.1%**
90-day search growth — must beat 0% to launch
**Conversion**
**Bad****0.9%**
search→purchase rate — share of searches ending in a sale
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United States niche tracking, rengoku is a $127K/yr Amazon United States market (417K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in Aug–Sep–Nov–Dec. Verdict: Skip it — 39/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **rengoku market data**
- **Units sold / yr**
- **5K–6K**
- avg 100–250/product
- **Revenue / yr**
- **$168K–$201K**
- units × avg price
- **Conversion rate**
- **0.9%**
- **Avg BSR**
- **#4,245**
- **Page quality**
- **0%**
- **Prime**
- **79%**
- **Sponsored**
- **14%**
- **Out of stock**
- **10.8%**
- **Avg brand age**
- **34 months**
- **Avg seller age**
- **155 days**
## **Competition & brand share**
The top 5 products capture 72% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**10 **▼falling
**Sellers**
**138**
**Top-5 brand share**
**83%**
Top 20: 100%
**Top-5 click share**
**72%**
Top 20: 100%
**Open market**
**12%**
- Juejuezi40% - Funko16% - Banpresto11% - Ultimate Legends11% - SEGA5% - SONGCHANGJEWELRY5% - Open — no brand owns it (4 brands, 12%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -15.1% search growth over the last 90 days.
20K15KHoliday '24Prime Day '25Spike '25Holiday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Aug, Sep, Nov, Dec · busiest ÷ quietest = 4.1×
[**Open Trend **](https://flapen.com/research/us/home-kitchen/rengoku/trend)
## **Top rengoku search terms**
- **rengoku**196K/yr-13.3%0.5% conv. - **rengoku figure**89K/yr-13.9%0.5% conv. - **rengoku funko pop**37K/yr-18.1%1.1% conv. - **demon slayer rengoku**34K/yr-24.1%0.6% conv. - **kyojuro rengoku**19K/yr-5.7%0.4% conv. - **rengoku merch**12K/yr-25.0%0.5% conv. - **rengoku action figure**9K/yr-9.8%0.6% conv. - **demon slayer funko pop rengoku**4K/yr+11.8%0.5% conv. - **funko rengoku**3K/yr-28.9%0.4% conv. - **rengoku funko**5K/yr-16.0%1.8% conv. [**All search terms **](https://flapen.com/research/us/home-kitchen/rengoku/search-terms)
## **Top rengoku 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%10%$13K20%$25K30%$38K40%$51K101001K10K 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**Hooded Wearable Blanket Hoodie Throw Blanket Cloak Cosplay Costume Shawl Wrap Nap Quilt 160x100 cm/63x40in(White One Size)**Juejuezi**$28.55**4.6★339 rev](https://www.amazon.com/dp/B0BTVKCV31) [2**Ultimate Legends - Demon Slayer - Kyojuro Rengoku 5 Action Figure**Ultimate Legends**$18.62**4.6★662 rev](https://www.amazon.com/dp/B0CX355V4Y) [3**Funko Pop! Animation: Demon Slayer - Rengoku - Sumi-Ink - Collectable Vinyl Figure - Gift Idea - Official Merchandise - Toys for Kids & Adults - Anime Fans - Model Figure for Collectors**Funko**$15.67**4.5★29 rev](https://www.amazon.com/dp/B0FCFW156Y) [4**Funko POP! Animation: Demon Slayer - Kyojuro Rengoku - Collectable Vinyl Figure - Gift Idea - Official Merchandise - for Kids & Adults - Anime Fans - Model Figure for Collectors and Display**Funko**$21.01**4.9★2,344 rev](https://www.amazon.com/dp/B09V869GSV) [5**SEGA - Demon Slayer: Kimetsu no Yaiba PM Perching Figure Kyojuro Rengoku**SEGA**$37.96**4.9★1,149 rev](https://www.amazon.com/dp/B08YN2NXX2)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Funko Pop! Animation: Demon Slayer - Rengoku - Sumi-Ink - Collectable Vinyl Figure - Gift Idea - Official Merchandise - Toys for Kids & Adults - Anime Fans - Model Figure for Collectors**Funko**$15.67**29 rev7mo ago](https://www.amazon.com/dp/B0FCFW156Y) [**Demon Slayer Kimetsu No Yaiba Rengoku Flame Hashira Anime Tumbler 30 Oz**Team Liquid**$35.05**468 rev12mo ago](https://www.amazon.com/dp/B0FJ2VVF2R) [**Banpresto - Demon Slayer: Kimetsu no Yaiba - Kyojuro Rengoku Maximatic Figure**Banpresto**$34.26**20 rev1y ago](https://www.amazon.com/dp/B0DVLZB2YP) [**Adult Anime Cosplay Costume Kimono Cape Cardigan Top**IOONCHI**$23.54**107 rev1y ago](https://www.amazon.com/dp/B0DWXCLSZ4) [**Ultimate Legends - Demon Slayer - Kyojuro Rengoku 5 Action Figure**Ultimate Legends**$18.62**662 rev2y ago](https://www.amazon.com/dp/B0CX355V4Y)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Adult Anime Cosplay Costume Kimono Cape Cardigan Top**IOONCHI**$23.54**4.4★**▲ 172%**](https://www.amazon.com/dp/B0DWXCLSZ4) [**Funko Pop! Animation: Demon Slayer - Rengoku - Sumi-Ink - Collectable Vinyl Figure - Gift Idea - Official Merchandise - Toys for Kids & Adults - Anime Fans - Model Figure for Collectors**Funko**$15.67**4.5★**▲ 69%**](https://www.amazon.com/dp/B0FCFW156Y) [**Hooded Wearable Blanket Hoodie Throw Blanket Cloak Cosplay Costume Shawl Wrap Nap Quilt 160x100 cm/63x40in(White One Size)**Juejuezi**$28.55**4.6★**▲ 67%**](https://www.amazon.com/dp/B0BTVKCV31) [**Anime Rengoku Hanafuda Earrings - Accessories for Kimetsu No Yaiba Cosplay**SONGCHANGJEWELRY**$10.03**4.6★**▲ 45%**](https://www.amazon.com/dp/B08SLW44FG) [**TAMASHII NATIONS - Demon Slayer: Kimetsu no Yaiba - Kyojuro Rengoku Flame Hashira Bandai Spirits FiguartsZERO Collectible Statue**TAMASHII NATIONS**$122.84**4.7★**▲ 35%**](https://www.amazon.com/dp/B09H7TBN3Q)
**~~View all trending →~~**
## **What buyers say about rengoku**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Fun/Entertainment Experience**14%
*“Il adore jouer avec”*
**Quality-Overall**14%
*“Great details, price is very reasonable for the size and doesnt break easily”*
**Value For Money**12%
*“Hes also decently hefty for a budget figurine”*
**Comfort-Overall**10%
*“Comfy”*
**Ease Of Cleaning**9%
*“Very easy to clean”*
**Gifting Purpose**9%
*“Loved this gift”*
**Collectibles**7%
*“Good details just veryyyy small regular q poskets are bigger this on is the petite collection I didnt realize that when I bought it”*
**Assembly/Installation**7%
*“It was really easy to put together and good quality”*
**Design-Overall**4%
*“looks is very good”*
**Advertised Vs Actual Product**2%
*“Just as advertised”*
### **What buyers complain about **
**Quality-Overall**27%
*“Poor quality”*
**Balance/Stability**20%
*“doesnt look stable at all”*
**Durability**17%
*“right fist broke within first 5 minutes”*
**Strength**10%
*“This figure is very delicate”*
**Display-Overall**10%
*“This figure is very delicate and is strictly for display, not playing with”*
**Machine Wash Suitability**7%
*“It fell apart with two washes”*
### **Top return reasons **
**Size-Overall**23%
**Defective Material/Parts**21%
**Value For Money**8%
**Durability**8%
**Advertised Vs Actual Product**6%
**Quality-Overall**5%
**Product Condition**5%
**Shape/Style**4%
**Hard Feel**3%
**Strength**3%
## **Common questions**
- **Is rengoku profitable to sell on Amazon United States?**
- The niche generates $127K/yr across 14 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -15.1%. Flapen's verdict: Skip it (39/100).
- **How competitive is the rengoku niche?**
- 10 brands and 138 sellers compete. The top 5 products take 72% of clicks and top 5 brands hold 83% of demand.
- **What do buyers complain about in rengoku?**
- Top complaints mined from reviews: Quality-Overall, Balance/Stability, Durability. The return rate is 1.2%.
- **When does demand for rengoku peak?**
- Demand peaks in Aug–Sep–Nov–Dec; the busiest month runs 4.1× the quietest.
- **What does it cost to enter the rengoku niche?**
- Listings span $10.03–$122.84; the average listing price is $33.57 (sweet spot $15–$100). The average incumbent carries 527 reviews — the moat a new listing must climb.
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