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posca 3m

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Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Market size 6Growth 29Conversion 56Competition 17Returns 94Price range 91Avg price 95Brand share 0Review moat 23Quality gap 16

Avg price

Incredible$28.45

avg listing price — sweet spot $15–$100

Returns

Great1.1%

return rate — above 6% kills the launch gate

Price range

Great$12.95–$58.11

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

Conversion

Good4.7%

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

Growth

Okay+3.3%

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

Review moat

Bad7,030.83

avg incumbent reviews — the moat a new listing must climb

Competition

Bad80%

top-5 click share — a locked-up shelf

Quality gap

Bad4.8★

avg incumbent rating — lower means beatable quality

Market size

Bad$24K

$24K/yr · 18K searches

Brand share

Bad100%

top-5 brand share — brand-locked demand

Competition

The top 5 products capture 80% of clicks — a locked-up shelf that new listings rarely crack.

Brands

4 falling

Sellers

57

Top-5 brand share

100%

Open market

0%

  • posca76%
  • uni14%
  • Posco Marker Sanetomo8%
  • 三菱鉛筆2%

Product shelf

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$2K20%$5K30%$7K40%$9K101001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 12 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 95 weeks — +3.3% search growth over the last 90 days.
2K1KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Holiday '25Spike '26DecMarJunAugNovMarMay

Peak months: Nov, Dec · busiest ÷ quietest = 3.6×

Reviews

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

What buyers love

Color26%

“Amazing colors”

Quality-Overall19%

“the quality is completely unmatched”

Value For Money7%

“Reasonably priced”

Paint Quality6%

“Great paint pens”

Ease Of Use6%

“Easy to use”

Advertised Vs Actual Product4%

“Works as advertised”

Efficiency4%

“Work great”

Pen/Pencil Quality3%

“Nice markers”

Drawing Experience3%

“Enjoyed using it to draw and write”

Durability3%

“very durable”

What buyers complain about

Paint Quality13%

“it suddenly releases a large amount of paint all at once”

Value For Money12%

“They are a little pricey”

Color8%

“Not Enough Colors”

Dry/Empty Ink5%

“Dried out”

Durability5%

“then died so fast”

Leak-Proof5%

“Leaks badly”

Quality-Overall4%

“Cheap”

Product Condition4%

“Ordered New, looks like I received Used >:”

Functionality-Overall4%

“they dont work”

Ease Of Use3%

“blending was not easy”

Top return reasons

Size-Overall17%
Value For Money12%
Paint Quality11%
Advertised Vs Actual Product9%
Color9%
Functionality-Overall9%
Product Condition4%
Thin3%
Thickness3%
Leak-Proof3%