---
title: "Kunai — $5K/mo Amazon US Product Research (2026)"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/kunai"
last_updated: "2026-08-12T13:53:16.312Z"
locale: en
meta:
description: "Amazon product research for kunai: $5K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for kunai: $5K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Kunai — $5K/mo Amazon US Product Research (2026)"
---
# **Kunai**
**Worth a look**
Shows a sweet-spot price point ($23.43 avg), but weak search conversion (0.8%) keeps it on the watch list.
Market size 14Growth 22Conversion 11Competition 71Returns 91Price range 87Avg price 95Brand share 75Review moat 82Quality gap 58
**Avg price**
**Incredible****$23.43**
avg listing price — sweet spot $15–$100
**Returns**
**Great****1.2%**
return rate — above 5% kills the launch gate
**Price range**
**Great****$7.90–$78.00**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Great****362.44**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Good****60%**
top-5 brand share — brands hold most of the demand
**Competition**
**Good****42%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-6.5%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$58K**
$58K/yr · 292K searches
**Conversion**
**Bad****0.8%**
search→purchase rate — share of searches ending in a sale
## **Is kunai profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, kunai is a $58K/yr Amazon United States market (292K searches/yr). The top 5 brands hold 60% of demand. Demand peaks in Oct–Dec. Verdict: Worth a look — 53/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **kunai market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **3K–4K**
- avg 0–100/product
- **Revenue / yr**
- **$70K–$94K**
- units × avg price
- **Conversion rate**
- **0.8%**
- **Avg BSR**
- **#3,656**
- **Page quality**
- **0%**
- **Prime**
- **90%**
- **Sponsored**
- **46%**
- **Out of stock**
- **1.6%**
- **Avg brand age**
- **50 months**
- **Avg seller age**
- **172 days**
## **Competition: brands, sellers & click share**
The top 5 products take 42% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**24 **—flat
**Sellers**
**48**
**Top-5 brand share**
**60%**
Top 20: 98%
**Top-5 click share**
**42%**
Top 20: 83%
**Open market**
**35%**
- REAT22% - OOHGLITZ14% - CKHOF11% - FAYAIALO8% - ABYSTYLE5% - Dispatch5%
## **kunai demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -6.5% search growth over the last 90 days.
7K5KSpike '25 seasonSepDecMarJunAugNovMarMay
Peak months: Oct, Dec · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/kunai/trend)
## **Top kunai search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **kunai**134K/yr+0.3%0.7% conv. - **kunai knife**41K/yr-17.8%0.7% conv. - **naruto kunai**32K/yr-10.7%0.9% conv. - **naruto weapons**19K/yr-11.8%0.3% conv. - **kunai throwing knives**15K/yr-9.4%1.1% conv. - **kuni**13K/yr-6.2%0.4% conv. - **naruto knife**6K/yr-6.1%0.5% conv. - **kunai toy**7K/yr+19.3%2.0% conv. - **kunai knives**4K/yr-20.1%0.2% conv. - **naruto shuriken**5K/yr+0.6%1.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/kunai/search-terms)
## **Top kunai 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%3%$2K6%$3K9%$5K12%$7K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**REAT Throwing Knives - 3 Piece 6.5 440 Stainless Steel with Cord-Wrapped Handle Includes Nylon Carrying Case for Safe Storage Ninja Kunai Knives for Competition Recreation Gifts for Men Women**REAT**$8.11**4.2★187 rev](https://www.amazon.com/dp/B0FKYJJZH7) [2**CKHOF 9.05 inches Minato Kunai Real Uzumaki Kakashi Namikaze Kunai Weapons Minato Costume Ninja Kunai Models (Metallic)**CKHOF**$18.73**4.9★49 rev](https://www.amazon.com/dp/B0CY5J1T1B) [3**OOHGLITZ 7-Piece Anime Cosplay Kit ABS Plastic Ninja Kunai (5.1) Throwing Stars/Shuriken(3.5) Toy Set with Pouch and Bandage for Anime Fans Martial Arts Props Black**OOHGLITZ**$16.22**4.4★29 rev](https://www.amazon.com/dp/B0FNM9S648) [4**FAYAIALO Minato Kunai 8.7 inches Uzumaki Kakashi Namikaze Kunai Real Metal Ninja Cosplay Figure Model Keychain Collection**FAYAIALO**$20.71**4.3★46 rev](https://www.amazon.com/dp/B0BX9HD6Y4) [5**OOHGLITZ 11-Piece Anime Ninja Cosplay Kit Plastic Ninja Kunai (10.2+5.1) Shuriken Ninja Stars (3.5) Set with Pouch for Anime Fans Ninja& Martial Arts Props Black**OOHGLITZ**$25.26**4.4★44 rev](https://www.amazon.com/dp/B0F83F1X1Q)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**LENGREN KUNAI Tactical Fixed Blade Knife 5.4 Full Tang Double Edge Blade Battle Dagger Short Sword for Outdoor Survival Hunting EDC & Camping (Brown linen Tiger Stripe Blade)**LENGREN**$78.00**7 rev6mo ago](https://www.amazon.com/dp/B0GCWV47KF) [**REAT Throwing Knives - 3 Piece 9 440 Stainless Steel with Cord-Wrapped Handle Includes Nylon Carrying Case for Safe Storage Ninja Kunai Knives for Competition Recreation Gifts for Men Women**REAT**$9.97**20 rev6mo ago](https://www.amazon.com/dp/B0GC6T2M5B) [**Kunai Ninja Cosplay Props Ninja Themed Costume Plastic Cosplay Accessories Kunai Set Black**Generic**$20.12**6 rev6mo ago](https://www.amazon.com/dp/B0GC7F9LNS) [**OOHGLITZ 7-Piece Anime Cosplay Kit ABS Plastic Ninja Kunai (5.1) Throwing Stars/Shuriken(3.5) Toy Set with Pouch and Bandage for Anime Fans Martial Arts Props Black**OOHGLITZ**$16.22**29 rev10mo ago](https://www.amazon.com/dp/B0FNM9S648) [**REAT Throwing Knives - 3 Piece 6.5 440 Stainless Steel with Cord-Wrapped Handle Includes Nylon Carrying Case for Safe Storage Ninja Kunai Knives for Competition Recreation Gifts for Men Women**REAT**$8.11**187 rev11mo ago](https://www.amazon.com/dp/B0FKYJJZH7)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**REAT Throwing Knives - 3 Piece 9 440 Stainless Steel with Cord-Wrapped Handle Includes Nylon Carrying Case for Safe Storage Ninja Kunai Knives for Competition Recreation Gifts for Men Women**REAT**$9.97**4.0★**▲ 380%**](https://www.amazon.com/dp/B0GC6T2M5B) [**Metallic Katana Ninja Black Sword and Sheath Prop | Ninja Accessories Standard**Fun Costumes**$16.38**4.0★**▲ 354%**](https://www.amazon.com/dp/B0D74YDKSJ) [**ABYSTYLE Naruto Shippuden Fourth Hokage Kunai 3D Metal Keychain Anime Manga Accessories Merch Gift**ABYSTYLE**$12.66**3.9★**▲ 275%**](https://www.amazon.com/dp/B07S8C6HKZ) [**LENGREN KUNAI Tactical Fixed Blade Knife 5.4 Full Tang Double Edge Blade Battle Dagger Short Sword for Outdoor Survival Hunting EDC & Camping (Brown linen Tiger Stripe Blade)**LENGREN**$78.00**4.5★**▲ 268%**](https://www.amazon.com/dp/B0GCWV47KF) [**Kunai Ninja Cosplay Props Ninja Themed Costume Plastic Cosplay Accessories Kunai Set Black**Generic**$20.12**5.0★**▲ 235%**](https://www.amazon.com/dp/B0GC7F9LNS)
**~~View all trending →~~**
## **What reviews say buyers love and hate about kunai**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Sharpness**17%
*“Happy it came sharpened”*
**Quality-Overall**16%
*“Solid quality”*
**Value For Money**10%
*“definitely worth the money”*
**Weight Light**5%
*“I appreciate that the pieces are lightweight”*
**Balance/Stability**5%
*“Great balance”*
**Size-Overall**4%
*“Good size”*
**Advertised Vs Actual Product**4%
*“Better than expected”*
**Grip**4%
*“The grip is comfortable”*
**Durability**4%
*“Very durable,”*
**Fun/Entertainment Experience**3%
*“It sparked a lot of imaginative play”*
### **What buyers complain about **
**Size-Overall**14%
*“It is huge”*
**Quality-Overall**13%
*“These are very low quality”*
**Sharpness**7%
*“somehow isn't sharp at all”*
**Weight Light**7%
*“At first I thought the knives might be too light-”*
**Durability**6%
*“Comes off”*
**Grip**3%
*“That said, these are very sharp, so definitely not something you want to casually handle or leave around”*
**Value For Money**3%
*“For $30.00 i didn't expect much”*
**Advertised Vs Actual Product**3%
*“The product description is deceptive”*
**Strap/String Quality**3%
*“the strings came off right away though”*
**Handle Quality**2%
*“Cord from the handles has fallen off almost immediately. first use”*
### **Top return reasons **
**Size-Overall**35%
**Quality-Overall**9%
**Advertised Vs Actual Product**7%
**Material Quality**5%
**Sharpness**5%
**Value For Money**4%
**Durability**4%
**Handle Quality**4%
**Functionality-Overall**3%
**Defective Material/Parts**3%
## **Common kunai questions**
- **Is kunai profitable to sell on Amazon United States?**
- The niche generates $58K/yr across 39 tracked products. 1 of 14 products launched in the last 360 days are still selling. 90-day search growth is -6.5%. Flapen's verdict: Worth a look (53/100).
- **How competitive is the kunai niche?**
- 24 brands and 48 sellers compete. The top 5 products take 42% of clicks and top 5 brands hold 60% of demand.
- **What do buyers complain about in kunai?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Sharpness. The return rate is 1.2%.
- **When does demand for kunai peak?**
- Demand peaks in Oct–Dec; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the kunai niche?**
- Listings span $7.90–$78.00; the average listing price is $23.43 (sweet spot $15–$100). The average incumbent carries 362 reviews — the moat a new listing must climb.
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