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ゴムボーイ 210 替刃

brand-locked demand (top 5 brands take 100% of clicks) — ゴムボーイ 210 替刃 doesn't clear our bar today.

Flapen Score

46
Skip it

Ranks 3,692 of 4,191 DIY・工具・ガーデン niches · −11 vs the category median of 57

Market size 74Growth 20Conversion 63Competition 19Returns 99Price range 0Avg price 0Brand share 0Review moat 96Quality gap 78
This niche Category average · 4,191 niches

Is ゴムボーイ 210 替刃 profitable on Amazon?

According to Flapen's Amazon Japan niche tracking, ゴムボーイ 210 替刃 is a ¥833K/yr Amazon Japan market (9K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 46/100.

ゴムボーイ 210 替刃: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Not really. Search demand moved -10.4% over the last 90 days and 5.5% of searches end in a purchase.

¥833K

revenue / yr

Units sold / yr750
Search volume / yr-10.4%9K
Conversion rate5.5%
Avg price¥1630.34

Who owns the niche?

The top 5 brands hold 100% of demand, so 0% of the market is open.

0%

open market share

Brands · sellers5 · 39
Top-5 product click share77%
Open market0%
Avg brand age171 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.3★ — the gap to enter on.

0/100

page quality · 13 products

Sponsored placement23%
New entrants (1y)1· 1 succeeded
Avg rating4.3★
Avg reviews74

Top ゴムボーイ 210 替刃 products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.

¥0¥83K¥167K¥250K¥333K1101001K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)2 products missing review or click data not plotted

Brands

5 flat

Sellers

39

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

77%

Top 20: 100%

Open market

0%

  • Silky90%
  • SK11(エスケー11)5%
  • アクロバート2%
  • 新潟精機(Niigataseiki)2%
  • ノーブランド品2%

ゴムボーイ 210 替刃 demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume9KCVR5.5%Products13Brands5Top 5 Brands100%OOS Rate2.8%Rating4.3★Reviews74Avg BSR#41
250150Spike '26Prime Day '26Dec '25Jan '26Feb '26Mar '26Apr '26May '26Jul '26

What reviews say buyers love and hate about ゴムボーイ 210 替刃

What buyers mention most, as a share of all reviews.

What buyers love

100% of reviews
総合品質29%

素晴らしい商品です。

使用の容易さ14%

使いやすい

持ち運びやすさ14%

どこでも手に入る

商品の状態14%

新品同様になります。

耐久性14%

耐久性がいい

What buyers complain about

100% of reviews
生锈/腐食する33%

使い終わったらスプレーオイルを一吹き、錆びることはなくなる。

厚み33%

今焼酎の物より少し歯の厚みが 薄いようです

硬い感覚33%

粗めの刃でしたが、切れ味は良かった。

ゴムボーイ 210 替刃 return rate & reasons

Why buyers send it back, as a share of all return requests.

0.2%

Return rate

0%

Fixable by listing

The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.

1サイズ全体
100%

Common ゴムボーイ 210 替刃 questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores ゴムボーイ 210 替刃 46/100 on Amazon Japan — Skip it. The niche generates ¥833K/yr across 13 tracked products. 1 of 1 products launched in the last 360 days are still selling. Search demand moved -10.4% over the last 90 days.
ゴムボーイ 210 替刃 buyers on Amazon Japan complain most about 生锈/腐食する, 厚み, 硬い感覚, the themes mined from the niche's reviews. Its return rate is 0.2%.