---
title: "Project Sekai — $124K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/toys-games/project-sekai"
last_updated: "2026-08-08T12:19:00.173Z"
locale: en
meta:
description: "Niche score 50/100 · $124K/yr market · 433K searches/yr · $50.16 avg price. Weak search conversion (0.6%) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · $124K/yr market · 433K searches/yr · $50.16 avg price. Weak search conversion (0.6%) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Project Sekai — $124K/yr Amazon US Niche (2026) - Flapen"
---
# **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.
Market size 28Growth 21Conversion 7Competition 86Returns 64Price range 78Avg price 93Brand share 49Review moat 93Quality gap 50
**Review moat**
**Great****145.95**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Great****$50.16**
avg listing price — sweet spot $15–$100
**Competition**
**Great****29%**
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**
**Good****2.5%**
return rate — above 5% kills the launch gate
**Quality gap**
**Good****4.5★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Okay****76%**
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**
**Bad****0.6%**
search→purchase rate — share of searches ending in a sale
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
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 ~~](https://flapen.com/research/methodology)
## **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.
13K8KSpike '25Prime Day '25Black Friday '25Holiday '25Spike '26 seasonMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJunJul
Peak months: Nov, Dec · busiest ÷ quietest = 2.2×
[**Open Trend **](https://flapen.com/research/us/toys-games/project-sekai/trend)
## **Top project sekai search terms**
- **project sekai**202K/yr-4.1%0.1% conv. - **weiss schwarz**76K/yr-3.3%0.7% conv. - **weiss schwarz booster box**48K/yr-20.1%0.8% conv. - **project sekai figure**28K/yr-18.7%0.1% conv. - **hatsune miku colorful stage**21K/yr-22.7%0.1% conv. - **colorful stage**25K/yr-20.5%0.1% conv. - **project sekai merch**18K/yr+2.2%0.1% conv. - **weiss schwarz trial deck**6K/yr-7.4%0.0% conv. - **sekai**4K/yr+62.7%0.0% conv. - **project sekai colorful stage**4K/yr-4.6%0.4% conv. [**All search terms **](https://flapen.com/research/us/toys-games/project-sekai/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.
0%3%$4K6%$7K9%$11K12%$15K1101001K 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**Weiss Schwarz Booster Pack Project Sekai Colorful Stage! feat. Hatsune Miku Vol. 3 BOX**Bushiroad**$59.44**4.4★29 rev](https://www.amazon.com/dp/B0FSPTW99Z) [2**60Pcs Anime Stationery Stickers Project Sekai Vocaloid Cute Kawaii Sticker Stationery Student Cartoon Manga Waterproof Graffiti Decorate**Generic**$10.91**3.1★4 rev](https://www.amazon.com/dp/B0GKZ8SX94) [3**Weiss Schwarz Rose Booster Pack: Interspecies Reviewers Box**Generic**$49.30**4.6★3 rev](https://www.amazon.com/dp/B0GSQLQXGZ) [4**QIUTIMIY Paisley Pashmina Shawls and Wraps for Women Reversible Jacquard Festival Rave Pashmina Scarves with Fringe Vintage(Flower17-White Black)**QIUTIMIY**$16.71**4.6★101 rev](https://www.amazon.com/dp/B0F3XF5TNY) [5**Bushiroad Weiss Schwarz Collection Pack Project Sekai Colorful Stage! feat. Hatsune Miku Box: 20 Packs (1 Pack = 1 Card)**Bushiroad**$26.44**4.3★40 rev](https://www.amazon.com/dp/B0DK17ND4Y)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Weiss Schwarz The Eminence in Shadow Booster Box (English) 12 Packs Bushiroad TCG 2026**Weiss Schwarz**$92.37**3 rev3mo ago](https://www.amazon.com/dp/B0GY9X7CX3) [**Weiss Schwarz Rose Booster Pack: Interspecies Reviewers Box**Generic**$49.30**3 rev4mo ago](https://www.amazon.com/dp/B0GSQLQXGZ) [**60Pcs Anime Stationery Stickers Project Sekai Vocaloid Cute Kawaii Sticker Stationery Student Cartoon Manga Waterproof Graffiti Decorate**Generic**$10.91**4 rev5mo ago](https://www.amazon.com/dp/B0GKZ8SX94) [**SUUKSESS Women Silk Cashmere Blend Crew Neck Short Sleeve Sweaters Business Casual Knitted Blouses (Camel L)**SUUKSESS**$25.48**84 rev7mo ago](https://www.amazon.com/dp/B0G7H57NZD) [**Thunder Tech Movie Project Sekai - Broken Sekai and Singing - Enai Miku Luminasta - Closed Window - Hatsune Miku Figure**Thunder Tech**$35.61**14 rev8mo ago](https://www.amazon.com/dp/B0G3P77KD9)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Good Smile Company Nendoroid Project Sekai Colorful Stage feat. Hatsune Miku Tenmaji Non-Scale Plastic Painted Action Figure**Good Smile Company**$79.75**5.0★**▲ 274%**](https://www.amazon.com/dp/B0G2LWK4HX) [**Weiss Schwarz The Eminence in Shadow Booster Box (English) 12 Packs Bushiroad TCG 2026**Weiss Schwarz**$92.37**3.2★**▲ 274%**](https://www.amazon.com/dp/B0GY9X7CX3) [**SUUKSESS Women Silk Cashmere Blend Crew Neck Short Sleeve Sweaters Business Casual Knitted Blouses (Camel L)**SUUKSESS**$25.48**4.2★**▲ 272%**](https://www.amazon.com/dp/B0G7H57NZD) [**Good Smile Company Nendoroid Project Sekai Colorful Stage! feat. Hatsune Miku Yoisaki Kanade Non-Scale Plastic Pre-Painted Action Figure**Good Smile Company**$73.21**5.0★**▲ 270%**](https://www.amazon.com/dp/B0G1RV6VBZ) [**QIUTIMIY Paisley Pashmina Shawls and Wraps for Women Reversible Jacquard Festival Rave Pashmina Scarves with Fringe Vintage(Flower17-White Black)**QIUTIMIY**$16.71**4.6★**▲ 262%**](https://www.amazon.com/dp/B0F3XF5TNY)
**~~View all trending →~~**
## **What buyers say about project sekai**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**31%
*“Good quality”*
**Collectibles**13%
*“I love collecting them”*
**Advertised Vs Actual Product**11%
*“Is as advertised”*
**Size-Overall**11%
*“It's the right size”*
**Value For Money**4%
*“The price is affordable”*
**Zipper Quality**3%
*“has a sturdy zipper”*
**Color**3%
*“color I order for him”*
**Assembly/Installation**3%
*“The assembly was easy”*
**Strength**2%
*“It's sturdy and well made”*
**Trivia Games**2%
*“As described, easy decks for bowling league”*
### **What buyers complain about **
**Value For Money**22%
*“for almost $100 it's sad that it didn't come with everything”*
**Size-Overall**12%
*“Bigger than what we though”*
**Quality-Overall**8%
*“But they are pretty dope”*
**Advertised Vs Actual Product**7%
*“Bad product and omiting relevant info”*
**Strap/String Quality**5%
*“The straps are a little flimsy”*
**Drop/Impact Protection**4%
*“there was no protection”*
**Print Quality**4%
*“reprint”*
**Durability**4%
*“breaking in sucks”*
**Hard Feel**4%
*“Rough back runs”*
**Ethical Trade/Fair Trade**2%
*“I feel completely scammed betrayed and lied to”*
### **Top return reasons **
**Size-Overall**31%
**Feet Fit**11%
**Advertised Vs Actual Product**10%
**Length**8%
**Color**7%
**Defective Material/Parts**5%
**Value For Money**3%
**Material Quality**3%
**Width**3%
**Print Quality**2%
## **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.
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