Is project sekai profitable to sell on Amazon United States?

The niche generates $124K/yr across 56 tracked products. 11 of 21 products launched in the last 360 days are still selling. 90-day search growth is -8.2%. Flapen's verdict: Worth a look (50/100).

How competitive is the project sekai niche?

19 brands and 183 sellers compete. The top 5 products take 29% of clicks and top 5 brands hold 76% of demand.

What do buyers complain about in project sekai?

Top complaints mined from reviews: Value For Money, Size-Overall, Quality-Overall. The return rate is 2.5%.

When does demand for project sekai peak?

Demand peaks in Nov–Dec; the busiest month runs 2.2× the quietest.

What does it cost to enter the project sekai niche?

Listings span $9.95–$117.58; the average listing price is $50.16 (sweet spot $15–$100). The average incumbent carries 146 reviews — the moat a new listing must climb.

project sekai

Worth a look

Shows a thin review moat (146 avg reviews), but weak search conversion (0.6%) keeps it on the watch list.

Review moat

Great145.95

avg incumbent reviews — the moat a new listing must climb

Avg price

Great$50.16

avg listing price — sweet spot $15–$100

Competition

Great29%

top-5 click share — an open shelf

Price range

Great$9.95–$117.58

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

Returns

Good2.5%

return rate — above 5% kills the launch gate

Quality gap

Good4.5★

avg incumbent rating — lower means beatable quality

Brand share

Okay76%

top-5 brand share — brands hold most of the demand

Market size

Okay$124K

$124K/yr · 433K searches

Growth

Bad-8.2%

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

Conversion

Bad0.6%

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

Signals High Price

According to Flapen's Amazon United States niche tracking, project sekai is a $124K/yr Amazon United States market (433K searches/yr). The top 5 brands hold 76% of demand. Demand peaks in Nov–Dec. Verdict: Worth a look — 50/100.

Data updated Jul 30, 2026 · scored weekly · How we score niches

project sekai market data

Units sold / yr: 3K–3K; avg 0–100/product
Revenue / yr: $125K–$150K; units × avg price
Conversion rate: 0.6%
Avg BSR: #5,890
Page quality: 0%
Prime: 95%
Sponsored: 36%
Out of stock: 7.3%
Avg brand age: 35 months
Avg seller age: 160 days

Competition & brand share

Clicks spread well past the top 5 (29% combined) — an open shelf where new products get seen.

Brands

19 rising

Sellers

183

Top-5 brand share

76%

Top 20: 100%

Top-5 click share

29%

Top 20: 68%

Open market

20%

Bushiroad34%
SEGA18%
Generic12%
Weiss Schwarz7%
Good Smile Company5%
QIUTIMIY4%

Demand & seasonality

Weekly Amazon search volume, last 77 weeks — -8.2% search growth over the last 90 days.

Peak months: Nov, Dec · busiest ÷ quietest = 2.2×

Open Trend

Top project sekai search terms

project sekai202K/yr -4.1%0.1% conv.
weiss schwarz76K/yr -3.3%0.7% conv.
weiss schwarz booster box48K/yr -20.1%0.8% conv.
project sekai figure28K/yr -18.7%0.1% conv.
hatsune miku colorful stage21K/yr -22.7%0.1% conv.
colorful stage25K/yr -20.5%0.1% conv.
project sekai merch18K/yr +2.2%0.1% conv.
weiss schwarz trial deck6K/yr -7.4%0.0% conv.
sekai4K/yr +62.7%0.0% conv.
project sekai colorful stage4K/yr -4.6%0.4% conv.

All search terms

Top project sekai 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★)

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

Top sellers

by 90-day click share

Weiss Schwarz Booster Pack Project Sekai Colorful Stage! feat. Hatsune Miku Vol. 3 BOX

Bushiroad$59.444.4★29 rev

60Pcs Anime Stationery Stickers Project Sekai Vocaloid Cute Kawaii Sticker Stationery Student Cartoon Manga Waterproof Graffiti Decorate

Generic$10.913.1★4 rev

Weiss Schwarz Rose Booster Pack: Interspecies Reviewers Box

Generic$49.304.6★3 rev

QIUTIMIY Paisley Pashmina Shawls and Wraps for Women Reversible Jacquard Festival Rave Pashmina Scarves with Fringe Vintage(Flower17-White Black)

QIUTIMIY$16.714.6★101 rev

Bushiroad Weiss Schwarz Collection Pack Project Sekai Colorful Stage! feat. Hatsune Miku Box: 20 Packs (1 Pack = 1 Card)

Bushiroad$26.444.3★40 rev

Newest

by launch date

Weiss Schwarz The Eminence in Shadow Booster Box (English) 12 Packs Bushiroad TCG 2026

Weiss Schwarz$92.373 rev

3mo ago

Weiss Schwarz Rose Booster Pack: Interspecies Reviewers Box

Generic$49.303 rev

4mo ago

60Pcs Anime Stationery Stickers Project Sekai Vocaloid Cute Kawaii Sticker Stationery Student Cartoon Manga Waterproof Graffiti Decorate

Generic$10.914 rev

5mo ago

SUUKSESS Women Silk Cashmere Blend Crew Neck Short Sleeve Sweaters Business Casual Knitted Blouses (Camel L)

SUUKSESS$25.4884 rev

7mo ago

Thunder Tech Movie Project Sekai - Broken Sekai and Singing - Enai Miku Luminasta - Closed Window - Hatsune Miku Figure

Thunder Tech$35.6114 rev

8mo ago

What buyers say about project sekai

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

What buyers love

Quality-Overall31%

“Good quality”

Collectibles13%

“I love collecting them”

Advertised Vs Actual Product11%

“Is as advertised”

Size-Overall11%

“It's the right size”

Value For Money4%

“The price is affordable”

Zipper Quality3%

“has a sturdy zipper”

Color3%

“color I order for him”

Assembly/Installation3%

“The assembly was easy”

Strength2%

“It's sturdy and well made”

Trivia Games2%

“As described, easy decks for bowling league”

What buyers complain about

Value For Money22%

“for almost $100 it's sad that it didn't come with everything”

Size-Overall12%

“Bigger than what we though”

Quality-Overall8%

“But they are pretty dope”

Advertised Vs Actual Product7%

“Bad product and omiting relevant info”

Strap/String Quality5%

“The straps are a little flimsy”

Drop/Impact Protection4%

“there was no protection”

Print Quality4%

“reprint”

Durability4%

“breaking in sucks”

Hard Feel4%

“Rough back runs”

Ethical Trade/Fair Trade2%

“I feel completely scammed betrayed and lied to”

Top return reasons

Size-Overall31%

Feet Fit11%

Advertised Vs Actual Product10%

Length8%

Color7%

Defective Material/Parts5%

Value For Money3%

Material Quality3%

Width3%

Print Quality2%

Common questions

Is project sekai profitable to sell on Amazon United States?: The niche generates $124K/yr across 56 tracked products. 11 of 21 products launched in the last 360 days are still selling. 90-day search growth is -8.2%. Flapen's verdict: Worth a look (50/100).
How competitive is the project sekai niche?: 19 brands and 183 sellers compete. The top 5 products take 29% of clicks and top 5 brands hold 76% of demand.
What do buyers complain about in project sekai?: Top complaints mined from reviews: Value For Money, Size-Overall, Quality-Overall. The return rate is 2.5%.
When does demand for project sekai peak?: Demand peaks in Nov–Dec; the busiest month runs 2.2× the quietest.
What does it cost to enter the project sekai niche?: Listings span $9.95–$117.58; the average listing price is $50.16 (sweet spot $15–$100). The average incumbent carries 146 reviews — the moat a new listing must climb.