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55

シャプトン(shapton)

Worth a look

Shows a $7.0M/yr market, but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.

Market size 99Growth 76Conversion 34Competition 43Returns 98Price range 0Avg price 0Brand share 0Review moat 56Quality gap 60

Market size

Incredible¥7.0M

¥7.0M/yr · 49K searches

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Growth

Great+62.7%

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Review moat

Good1,271.6

avg incumbent reviews — the moat a new listing must climb

Competition

Okay59%

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

Conversion

Okay2.7%

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

Brand share

Bad100%

top-5 brand share — brand-locked demand

Avg price

Bad¥5242.67

avg listing price — sweet spot $15–$100

Price range

Bad¥1720.93–¥14881.03

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

According to Flapen's Amazon Japan niche tracking, シャプトン(shapton) is a ¥7.0M/yr Amazon Japan market (49K searches/yr). The top 5 brands hold 100% of demand. Verdict: Worth a look — 55/100.

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

シャプトン(shapton) market data

Units sold / yr
1K–1K
avg 0–100/product
Revenue / yr
¥5.2M–¥6.6M
units × avg price
Conversion rate
2.7%
Avg BSR
#130
Page quality
0%
Prime
70%
Sponsored
90%
Out of stock
3.9%
Avg brand age
95 months
Avg seller age
180 days

Competition & brand share

The top 5 products take 59% of clicks — established leaders, but buyers still shop beyond them.

Brands

2 falling

Sellers

56

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

59%

Top 20: 100%

Open market

0%

  • Shapton88%
  • ノーブランド品12%
  • Open — no brand owns it (0%)

Demand & seasonality

Weekly Amazon search volume, last 96 weeks — +62.7% search growth over the last 90 days.
2K1KSpike '24Holiday '24Spike '25Prime Day '25Black Friday '25Spike '26DecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.9×

Top シャプトン(shapton) search terms

  • シャプトン(shapton)8K/yr
  • シャプトン16K/yr
  • シャプトン 砥石11K/yr
  • 砥石 シャプトン8K/yr
  • shapton7K/yr
All search terms

Top シャプトン(shapton) 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%10%¥698K20%¥1.4M30%¥2.1M40%¥2.8M1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)2 products missing review or click data not plotted

All 20 tracked products in this niche — three views at once, no toggling.

What buyers say about シャプトン(shapton)

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

What buyers love

使用の容易さ35%

“作業後の後始末が楽”

総合品質15%

“商品は最高。”

水に強い12%

“長時間水に浸さなくても使えるので便利です。”

柔らかい感触8%

“うーん滑らか”

コストパフォーマンス8%

“値段相応の良さ”

縫い目/仕上げ/磨き8%

“研磨力がピカイチ”

機能全体4%

“価格に見合った性能”

サイズ全体4%

“サイズは刃の黒幕と一緒”

What buyers complain about

コストパフォーマンス22%

“高い”

使用の容易さ17%

“もうすこし荒いほうが使いやすい”

総合品質17%

“12000番の質ではありません。”

厚み14%

“厚みはコチラの商品の方が薄型です。”

硬い感覚8%

“研石自体は結構硬いので長持ちすると思います”

耐久性6%

“すぐに刃はつくが、荒い感じがします。”

Top return reasons

不良材料/部品57%
総合品質29%
広告と実際の製品の違い14%

Common questions

Is シャプトン(shapton) profitable to sell on Amazon Japan?
The niche generates ¥7.0M/yr across 20 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +62.7%. Flapen's verdict: Worth a look (55/100).
How competitive is the シャプトン(shapton) niche?
2 brands and 56 sellers compete. The top 5 products take 59% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in シャプトン(shapton)?
Top complaints mined from reviews: コストパフォーマンス, 使用の容易さ, 総合品質. The return rate is 0.4%.
When does demand for シャプトン(shapton) peak?
Demand is steady year-round — the busiest month runs 1.9× the quietest.
What does it cost to enter the シャプトン(shapton) niche?
Listings span ¥1720.93–¥14881.03; the average listing price is ¥5242.67 (sweet spot $15–$100). The average incumbent carries 1,272 reviews — the moat a new listing must climb.