demon slayer birthday decorations
Skip itSoft demand (-24.6% this quarter) — this niche doesn't clear our bar today.
Review moat
Incredible55.81avg incumbent reviews — the moat a new listing must climb
Returns
Great1.4%return rate — above 5% kills the launch gate
Avg price
Great$18.38avg listing price — sweet spot $15–$100
Price range
Good$6.95–$36.79cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Good54%top-5 click share — leaders hold, buyers still browse
Market size
Good$280K$280K/yr · 456K searches
Conversion
Okay3.3%search→purchase rate — share of searches ending in a sale
Brand share
Okay83%top-5 brand share — brands hold most of the demand
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Growth
Bad-24.6%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, demon slayer birthday decorations is a $280K/yr Amazon United States market (456K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 49/100.
Data updated Jul 23, 2026 · scored weekly · How we score niches
demon slayer birthday decorations market data
- Units sold / yr
- 15K–20K
- avg 250–500/product
- Revenue / yr
- $276K–$368K
- units × avg price
- Conversion rate
- 3.3%
- Avg BSR
- #2,484
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 54%
- Out of stock
- 8.5%
- Avg brand age
- 22 months
- Avg seller age
- 171 days
Competition & brand share
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.Brands
15 rising
Sellers
16
Top-5 brand share
83%
Top 20: 100%
Top-5 click share
54%
Top 20: 93%
Open market
14%
- Generic35%
- SDONY33%
- Babymiu6%
- deenor5%
- Jinrea4%
- Quatrely3%
- Open — no brand owns it (9 brands, 14%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -24.6% search growth over the last 90 days.Peak months: Sep, Oct · busiest ÷ quietest = 2.5×
Top demon slayer birthday decorations search terms
- demon slayer birthday decorations154K/yr
- demon slayer party decorations61K/yr
- demon slayer cake topper39K/yr
- demon slayer birthday30K/yr
- demon slayer party favors30K/yr
- demon slayer decorations20K/yr
- demon slayer party21K/yr
- nezuko birthday decorations11K/yr
- demon slayer balloons14K/yr
- demon slayer cake decorations14K/yr
Top demon slayer birthday decorations 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
demon birthday party decorationsAnime theme party supplies Including banners balloons tablecloths dinner plates etc.
Generic$35.224.7★95 rev
132Pcs Demon-themed birthday party decorations and party supplies cake toppers spiral hangings dinner plates tablecloths stickers
Generic$32.744.7★111 rev
Demon Birthday Decorations Slayer Party Supplies Include Happy Birthday Banner Cake Topper and Cupcake Toppers Balloons for Kids Party Decor
SDONY$21.944.6★19 rev
25pcs Demon Cake Decorations with 1pcs Cake Topper 24pcs Cupcake Toppers for Slayer Birthday Party Supplies
SDONY$12.964.7★36 rev
Babymiu Anime Birthday Party Decoration Pack with Tapestry43pcsIncludes Cake Toppers Cupcake Toppers Balloons Banner Party Supplies Favors Merch For Adults Boys Girls Teens
Babymiu$25.864.2★8 rev
Newest
by launch date
30pcs Demon Cake Decorations with 30pcs Cupcake Toppers Party Supplies for Slayer Themed Birthday Decorations
EKIH$9.991 rev
139 PCS Anime Party Decorations Set with Banner Balloons Hanging Swirl Stickers Tablecloth Tableware for Adult Theme Party Supplies
WOOACME$17.591 rev
Jinrea Popular Anime Birthday Number 11 Candles Comic Book Themed Candles Anime-Themed Decorations Suitable for Party Celebrations Birthday Decorations11
Jinrea$9.001 rev
24Pcs Demon Themed Birthday Decorations Anime Party Supplies.Party Popcorn Boxes.
Generic$10.282 rev
120PCS Demon Anime Party Supplies for Boy Girls Kids Cartoons Birthday Party Decorations Tableware Set Plates Napkins Cups Set for 20 Guests
Rejoice Bunny$17.79268 rev
Trending
90-day click momentum30pcs Demon Cake Decorations with 30pcs Cupcake Toppers Party Supplies for Slayer Themed Birthday Decorations
EKIH$9.995.0★
139 PCS Anime Party Decorations Set with Banner Balloons Hanging Swirl Stickers Tablecloth Tableware for Adult Theme Party Supplies
WOOACME$17.595.0★
24Pcs Demon Themed Birthday Decorations Anime Party Supplies.Party Popcorn Boxes.
Generic$10.285.0★
Jinrea Popular Anime Birthday Number 11 Candles Comic Book Themed Candles Anime-Themed Decorations Suitable for Party Celebrations Birthday Decorations11
Jinrea$9.005.0★
120PCS Demon Anime Party Supplies for Boy Girls Kids Cartoons Birthday Party Decorations Tableware Set Plates Napkins Cups Set for 20 Guests
Rejoice Bunny$17.794.8★
What buyers say about demon slayer birthday decorations
What buyers praise and complain about, mined from review topics.What buyers love
“Great variety”
“Value is decent”
“accurate in the listing”
“Just the right size and quantity”
“Great Gift”
“Look beautiful”
“Fun”
“Colors nice”
“Cute easy to assemble gives your cup cakes a professional look”
“durable - sturdy”
What buyers complain about
“I mean the fact that its low quality might make it funnier”
“stands don't fit”
“Not as advertised”
“Colors were off”
“Each figure is made of cheap plastic very flexible very bendy that's bad”
“The balloons have a very chemical odor”
“They feel a bit flimsy and look cheap”
“Terrible gift quality”
“they break easy”
“doesn't work”
Top return reasons
Common questions
- Is demon slayer birthday decorations profitable to sell on Amazon United States?
- The niche generates $280K/yr across 26 tracked products. 6 of 20 products launched in the last 360 days are still selling. 90-day search growth is -24.6%. Flapen's verdict: Skip it (49/100).
- How competitive is the demon slayer birthday decorations niche?
- 15 brands and 16 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 83% of demand.
- What do buyers complain about in demon slayer birthday decorations?
- Top complaints mined from reviews: Quality-Overall, Size-Overall, Advertised Vs Actual Product. The return rate is 1.4%.
- When does demand for demon slayer birthday decorations peak?
- Demand peaks in Sep–Oct; the busiest month runs 2.5× the quietest.
- What does it cost to enter the demon slayer birthday decorations niche?
- Listings span $6.95–$36.79; the average listing price is $18.38 (sweet spot $15–$100). The average incumbent carries 56 reviews — the moat a new listing must climb.