Is kuromi birthday decorations profitable to sell on Amazon United States?

The niche generates $281K/yr across 44 tracked products. 0 of 14 products launched in the last 360 days are still selling. 90-day search growth is -13.5%. Flapen's verdict: Worth a look (58/100).

How competitive is the kuromi birthday decorations niche?

31 brands and 36 sellers compete. The top 5 products take 34% of clicks and top 5 brands hold 45% of demand.

What do buyers complain about in kuromi birthday decorations?

Top complaints mined from reviews: Size-Overall, Advertised Vs Actual Product, Adhesion/Stickiness. The return rate is 1.7%.

When does demand for kuromi birthday decorations peak?

Demand peaks in Sep; the busiest month runs 2.2× the quietest.

What does it cost to enter the kuromi birthday decorations niche?

Listings span $6.66–$30.57; the average listing price is $16.10 (sweet spot $15–$100). The average incumbent carries 99 reviews — the moat a new listing must climb.

kuromi birthday decorations

Worth a look

Shows a thin review moat (99 avg reviews), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Review moat

Incredible98.86

avg incumbent reviews — the moat a new listing must climb

Brand share

Great45%

top-5 brand share — no brand owns this niche

Competition

Great34%

top-5 click share — an open shelf

Returns

Great1.7%

return rate — above 5% kills the launch gate

Avg price

Great$16.10

avg listing price — sweet spot $15–$100

Price range

Good$6.66–$30.57

cheapest to priciest tracked listing — scored on the share inside $15–$100

Market size

Good$281K

$281K/yr · 528K searches

Conversion

Okay3.3%

search→purchase rate — share of searches ending in a sale

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Growth

Bad-13.5%

90-day search growth — must beat 0% to launch

Signals No Dominant Brand Low Review Barrier

According to Flapen's Amazon United States niche tracking, kuromi birthday decorations is a $281K/yr Amazon United States market (528K searches/yr). The top 5 brands hold 45% of demand. Demand peaks in Sep. Verdict: Worth a look — 58/100.

Data updated Jul 23, 2026 · scored weekly · How we score niches

kuromi birthday decorations market data

Units sold / yr: 15K–20K; avg 250–500/product
Revenue / yr: $242K–$322K; units × avg price
Conversion rate: 3.3%
Avg BSR: #3,307
Page quality: 0%
Prime: 100%
Sponsored: 64%
Out of stock: 9.0%
Avg brand age: 23 months
Avg seller age: 150 days

Competition & brand share

Clicks spread well past the top 5 (34% combined) — an open shelf where new products get seen.

Brands

31 falling

Sellers

Top-5 brand share

45%

Top 20: 88%

Top-5 click share

34%

Top 20: 77%

Open market

50%

HANISNA14%
GOTOFUN10%
Offa-annysice9%
Signreen6%
AVONO6%
DIOSN5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -13.5% search growth over the last 90 days.

Peak months: Sep · busiest ÷ quietest = 2.2×

Open Trend

Top kuromi birthday decorations search terms

kuromi birthday decorations299K/yr -14.8%2.2% conv.
kuromi party favors38K/yr -8.0%2.1% conv.
kuromi birthday33K/yr -12.3%1.5% conv.
kuromi balloons31K/yr -6.0%2.5% conv.
kuromi party decorations26K/yr -19.0%2.1% conv.
kuromi decorations11K/yr +5.8%1.4% conv.
my melody and kuromi birthday decorations13K/yr -14.4%1.4% conv.
kuromi balloon10K/yr -0.7%2.0% conv.
kuromi birthday party favors7K/yr -10.1%2.7% conv.
kuromi party9K/yr -28.1%1.3% conv.

All search terms

Top kuromi 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

121Pieces Kuromi Birthday Party Decorations Kids Cute Cartoon Party Supplies Include Happy Birthday Banner Balloons Tablecloth Plates Cupcake Toppers for Girls Backdrop

HANISNA$29.424.6★126 rev

Kawaii Birthday Decorations Cute Party Favors Party Supplies Set Include Banner Foil Balloons Tablecloth Backdrop Cake Toppers Hanging Swirl for Girls

Offa-annysice$17.384.9★67 rev

Kawaii Birthday Supplies Party Decorations Including Backdrop Birthday Banner Balloons Tablecloth Hanging Swirls Cake Toppers for Cute Party

GOTOFUN$19.224.7★71 rev

52PCS-Kuromi Birthday Party Supplies Party Decorations Set Include Banner Balloons Hanging Swirls Cake Cupcake Toppers Tablecloth for Girls Kuromi Theme Party..

DIOSN$16.224.6★26 rev

Kawaii Birthday Party Supplies Kawaii Party Decorations Include Balloons Garland Arch Kit Latex Balloons Foil Balloons Backdrop Tablecloth Kawaii Birthday Party Favors

Signreen$17.174.6★204 rev

Newest

by launch date

Birthday Party Decorations Kit - Includes Banner Cupcake Toppers Cake Decorations Balloons Foil Balloons and Tablecloth for Kids Celebration

Offa-annysice$14.950 rev

4mo ago

Kuromi Birthday Party Supplies Party Decorations Set Include Banner Backdrop Balloons Hanging Swirls Cake Cupcake Toppers Tablecloth for Girls Kuromi Theme Party

AVONO$23.158 rev

5mo ago

AVONO Kuromi Birthday Party Supplies Party Decorations Set Include Banner Balloons Hanging Swirls Cake Cupcake Toppers Tablecloth for Girls Kuromi Theme Party

AVONO$19.1614 rev

5mo ago

Pink Purple Black Foil Fringe Curtains Birthday Decorations 2 Pack 3.2x6.6ft Kawaii Tinsel Backdrop Photo Booth Props Cute Anime Birthday Party Decorations Supplies Favors

FESTFINDS$11.0343 rev

7mo ago

MUSNOW 13Pack Kuromis Party Supplies 12pcs Hanging Swirls and 1 Happy Birthday Banner for Kuromis Party Decoration (Yellow-8)

MUSNOW$11.679 rev

8mo ago

What buyers say about kuromi birthday decorations

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall20%

“Best quality”

Value For Money11%

“Worth the buy”

Advertised Vs Actual Product9%

“Better than expected”

Color9%

“Cute colors”

Design-Overall6%

“The design is super cute and colorful, and my child loves using them every day”

Size-Overall6%

“True to size”

Durability5%

“hold up well”

Fun/Entertainment Experience4%

“Fun and easy”

Assembly/Installation3%

“Easy to assemble”

Ease Of Use2%

“They were easy to use”

What buyers complain about

Size-Overall15%

“The tablecloth isnt wide enough for any of our tables”

Advertised Vs Actual Product11%

“Not as advertised”

Adhesion/Stickiness10%

“Didnt stick”

Inflation/Deflation8%

“Balloon slowly deflated extremely unsatisfied it was supposed to be for my daughters birthday”

Value For Money8%

“not a cent more”

Quality-Overall7%

“Cheap”

Smell7%

“The plates were open and vent, the banner had ink smeared all over it, the balloons smelled toxic”

Ease Of Use4%

“Could not use half the items”

Thickness2%

“They arent very thick”

Durability2%

“Then started to break apart”

Top return reasons

Size-Overall31%

Advertised Vs Actual Product16%

Value For Money16%

Quality-Overall5%

Color4%

Product Condition4%

Defective Material/Parts3%

Adhesion/Stickiness3%

Inflation/Deflation3%

Feet Fit2%

Common questions

Is kuromi birthday decorations profitable to sell on Amazon United States?: The niche generates $281K/yr across 44 tracked products. 0 of 14 products launched in the last 360 days are still selling. 90-day search growth is -13.5%. Flapen's verdict: Worth a look (58/100).
How competitive is the kuromi birthday decorations niche?: 31 brands and 36 sellers compete. The top 5 products take 34% of clicks and top 5 brands hold 45% of demand.
What do buyers complain about in kuromi birthday decorations?: Top complaints mined from reviews: Size-Overall, Advertised Vs Actual Product, Adhesion/Stickiness. The return rate is 1.7%.
When does demand for kuromi birthday decorations peak?: Demand peaks in Sep; the busiest month runs 2.2× the quietest.
What does it cost to enter the kuromi birthday decorations niche?: Listings span $6.66–$30.57; the average listing price is $16.10 (sweet spot $15–$100). The average incumbent carries 99 reviews — the moat a new listing must climb.