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66

耐水ペーパー 3000番

Launch it

A $2.1M/yr market growing +28.9% this quarter with returns at 0.3% — clears our launch bar.

Market size 95Growth 56Conversion 79Competition 61Returns 98Price range 0Avg price 0Brand share 40Review moat 79Quality gap 87

Returns

Incredible0.3%

return rate — above 5% kills the launch gate

Market size

Incredible¥2.1M

¥2.1M/yr · 38K searches

Quality gap

Great4.1★

avg incumbent rating — lower means beatable quality

Conversion

Great8.0%

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

Review moat

Great422.64

avg incumbent reviews — the moat a new listing must climb

Competition

Good48%

top-5 click share — leaders hold, buyers still browse

Growth

Good+28.9%

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

Brand share

Okay81%

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

Avg price

Bad¥712.27

avg listing price — sweet spot $15–$100

Price range

Bad¥435.67–¥1247.14

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

According to Flapen's Amazon Japan niche tracking, 耐水ペーパー 3000番 is a ¥2.1M/yr Amazon Japan market (38K searches/yr). The top 5 brands hold 81% of demand. Verdict: Launch it — 66/100.

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

耐水ペーパー 3000番 market data

Units sold / yr
3K–3K
avg 100–250/product
Revenue / yr
¥1.8M–¥2.1M
units × avg price
Conversion rate
8.0%
Avg BSR
#52
Page quality
0%
Prime
100%
Sponsored
84%
Out of stock
2.8%
Avg brand age
56 months
Avg seller age
187 days

Competition & brand share

The top 5 products take 48% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 falling

Sellers

29

Top-5 brand share

81%

Top 20: 100%

Top-5 click share

48%

Top 20: 94%

Open market

15%

  • MORLARCO24%
  • CREAM PRODUCT23%
  • IROKCAKPT15%
  • nesekt(ネセクト)11%
  • Hbitsae7%
  • BODHTAT4%
  • Open — no brand owns it (6 brands, 15%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +28.9% search growth over the last 90 days.
900700Spike '24Spike '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.5×

Top 耐水ペーパー 3000番 search terms

  • 耐水ペーパー 3000番26K/yr
  • 耐水ペーパー 30005K/yr
  • 3000番 ペーパー4K/yr
  • サンドペーパー 30004K/yr
All search terms

Top 耐水ペーパー 3000番 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%4%¥86K8%¥172K12%¥258K16%¥344K1101001K10K Reviews — right = deep review moat Market 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.

What buyers say about 耐水ペーパー 3000番

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

What buyers love

使用の容易さ30%

“便利”

コストパフォーマンス20%

“コスパイイです。”

総合品質13%

“良い製品です”

サイズ全体7%

“ちょうどいい量”

耐久性4%

“耐久性も十分。”

ペイントの品質3%

“塗装後の研磨に最適でした。”

縫い目/仕上げ/磨き3%

“丁寧な仕事に. 少し丁寧に磨きたい時におすすめです。. こだわりの仕上げになりますよ”

水に強い2%

“万能耐水ペーパー”

正しい内容2%

“数も入っているのでとても良いです”

広告と実際の製品の違い2%

“想定通りの商品です. 想定通りの商品で、問題なし。”

What buyers complain about

サイズ全体16%

“非常に小さいです。”

総合品質13%

“品質が悪く、精密な研ぎや磨きには向きません。”

コストパフォーマンス11%

“安いので不安でしたが”

使用の容易さ6%

“出しにくい”

厚み5%

“薄いキズだったが意外に目立つので目立たなくなるまで削り内装用の艶出し剤を使用すると目立たなくなりました。”

広告と実際の製品の違い5%

“商品説明と違う。”

ディスプレイ全体5%

“表示がおかしい”

ペイントの品質4%

“三回目くらいから何度洗っても塗装の削り粉で埋まり削れなくなった。”

ジャミング/詰まり2%

“目詰まりしているわけでもなく削れなくなります。”

接着性/粘着性2%

“少し貼り付きが弱いが、許容範囲かな。”

Top return reasons

サイズ全体42%
機能全体17%
不良材料/部品8%
水に強い8%
広告と実際の製品の違い8%
快適さ-全体8%
総合品質8%

Common questions

Is 耐水ペーパー 3000番 profitable to sell on Amazon Japan?
The niche generates ¥2.1M/yr across 25 tracked products. 5 of 5 products launched in the last 360 days are still selling. 90-day search growth is +28.9%. Flapen's verdict: Launch it (66/100).
How competitive is the 耐水ペーパー 3000番 niche?
12 brands and 29 sellers compete. The top 5 products take 48% of clicks and top 5 brands hold 81% of demand.
What do buyers complain about in 耐水ペーパー 3000番?
Top complaints mined from reviews: サイズ全体, 総合品質, コストパフォーマンス. The return rate is 0.3%.
When does demand for 耐水ペーパー 3000番 peak?
Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the 耐水ペーパー 3000番 niche?
Listings span ¥435.67–¥1247.14; the average listing price is ¥712.27 (sweet spot $15–$100). The average incumbent carries 423 reviews — the moat a new listing must climb.