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kokushibou sword

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A small market ($41K/yr) — this niche doesn't clear our bar today.

Market size 10Growth 16Conversion 26Competition 22Returns 69Price range 78Avg price 92Brand share 48Review moat 53Quality gap 28

Avg price

Great$52.03

avg listing price — sweet spot $15–$100

Price range

Great$20.03–$121.09

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

Returns

Good2.2%

return rate — above 6% kills the launch gate

Review moat

Good1,396.92

avg incumbent reviews — the moat a new listing must climb

Brand share

Okay76%

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

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Conversion

Okay2.1%

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

Competition

Bad74%

top-5 click share — a locked-up shelf

Growth

Bad-18.0%

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

Market size

Bad$41K

$41K/yr · 38K searches

Competition

The top 5 products capture 74% of clicks — a locked-up shelf that new listings rarely crack.

Brands

11 rising

Sellers

13

Top-5 brand share

76%

Open market

16%

  • SV34%
  • Sword fort13%
  • Sword Valley11%
  • Zisu10%
  • Jorumo9%
  • Cold Blade7%
  • Open — no brand owns it (5 brands, 16%)

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%$4K20%$8K30%$12K40%$16K1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

All 13 tracked products in this niche — three views at once, no toggling.

Demand

Weekly Amazon search volume, last 33 weeks — -18.0% search growth over the last 90 days.
1K600Black Friday '25Holiday '25Spike '26Nov '25Dec '25Feb '26Mar '26Apr '26May '26Jun '26

Reviews

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

What buyers love

Material Quality21%

“Its alright made out of plastic cheap so thats fine”

Adhesion/Stickiness14%

“Really nice once it put together I would glue it”

Value For Money14%

“Awesome stuff and cheaper than Lego by $40 bucks”

Fun/Entertainment Experience14%

“W katana fun”

Gifting Purpose7%

“Good gift”

Quality-Overall7%

“It is a decent product”

What buyers complain about

Assembly/Installation13%

“A little hard to put together”

Material Quality13%

“The plastic quality is poor”

Size-Overall13%

“the size is significantly smaller than anticipated”

Durability13%

“it broke a little bit trying to put it together other than that it is a somewhat good product”

Ease Of Use13%

“those were a little hard to put in”

Top return reasons

Defective Material/Parts21%
Instructions/User Manual/Troubleshooting11%
Assembly/Installation10%
Material Quality6%
Durability6%
Adhesion/Stickiness6%
Charging5%
Color5%
Advertised Vs Actual Product5%
Compatibility-Overall3%