Kunai
Worth a lookShows a sweet-spot price point ($23.43 avg), but weak search conversion (0.8%) keeps it on the watch list.
Avg price
Incredible$23.43avg listing price — sweet spot $15–$100
Returns
Great1.2%return rate — above 5% kills the launch gate
Price range
Great$7.90–$78.00cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Great362.44avg incumbent reviews — the moat a new listing must climb
Brand share
Good60%top-5 brand share — brands hold most of the demand
Competition
Good42%top-5 click share — leaders hold, buyers still browse
Quality gap
Good4.4★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
Bad0.8%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
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.Peak months: Oct, Dec · busiest ÷ quietest = 1.7×
Top kunai search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- kunai134K/yr
- kunai knife41K/yr
- naruto kunai32K/yr
- naruto weapons19K/yr
- kunai throwing knives15K/yr
- kuni13K/yr
- naruto knife6K/yr
- kunai toy7K/yr
- kunai knives4K/yr
- naruto shuriken5K/yr
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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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$8.114.2★187 rev
CKHOF 9.05 inches Minato Kunai Real Uzumaki Kakashi Namikaze Kunai Weapons Minato Costume Ninja Kunai Models (Metallic)
CKHOF$18.734.9★49 rev
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$16.224.4★29 rev
FAYAIALO Minato Kunai 8.7 inches Uzumaki Kakashi Namikaze Kunai Real Metal Ninja Cosplay Figure Model Keychain Collection
FAYAIALO$20.714.3★46 rev
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$25.264.4★44 rev
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$78.007 rev
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$9.9720 rev
Kunai Ninja Cosplay Props Ninja Themed Costume Plastic Cosplay Accessories Kunai Set Black
Generic$20.126 rev
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$16.2229 rev
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$8.11187 rev
Trending
90-day click momentumREAT 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$9.974.0★
Metallic Katana Ninja Black Sword and Sheath Prop | Ninja Accessories Standard
Fun Costumes$16.384.0★
ABYSTYLE Naruto Shippuden Fourth Hokage Kunai 3D Metal Keychain Anime Manga Accessories Merch Gift
ABYSTYLE$12.663.9★
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$78.004.5★
Kunai Ninja Cosplay Props Ninja Themed Costume Plastic Cosplay Accessories Kunai Set Black
Generic$20.125.0★
What reviews say buyers love and hate about kunai
What buyers praise and complain about, mined from review topics.What buyers love
“Happy it came sharpened”
“Solid quality”
“definitely worth the money”
“I appreciate that the pieces are lightweight”
“Great balance”
“Good size”
“Better than expected”
“The grip is comfortable”
“Very durable,”
“It sparked a lot of imaginative play”
What buyers complain about
“It is huge”
“These are very low quality”
“somehow isn't sharp at all”
“At first I thought the knives might be too light-”
“Comes off”
“That said, these are very sharp, so definitely not something you want to casually handle or leave around”
“For $30.00 i didn't expect much”
“The product description is deceptive”
“the strings came off right away though”
“Cord from the handles has fallen off almost immediately. first use”
Top return reasons
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.