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10mm レンチ

10mm レンチ shows low returns (0.5%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Flapen Score

63
Worth a look

Top 21% of 4,191 DIY・工具・ガーデン niches · +6 vs the category median of 57

Market size 95Growth 24Conversion 62Competition 74Returns 97Price range 0Avg price 0Brand share 73Review moat 55Quality gap 77
This niche Category average · 4,191 niches

Is 10mm レンチ profitable on Amazon?

According to Flapen's Amazon Japan niche tracking, 10mm レンチ is a ¥2.3M/yr Amazon Japan market (53K searches/yr). The top 5 brands hold 61% of demand. Demand peaks in Apr. Verdict: Worth a look — 63/100.

10mm レンチ: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Worth a look. Search demand moved -2.3% over the last 90 days and 5.5% of searches end in a purchase.

¥2.3M

revenue / yr

Units sold / yr3K
Search volume / yr-2.3%53K
Conversion rate5.5%
Avg price¥785.29

Who owns the niche?

The top 5 brands hold 61% of demand, so 39% of the market is open.

39%

open market share

Brands · sellers20 · 85
Top-5 product click share41%
Open market39%
Avg brand age59 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 · 35 products

Sponsored placement63%
New entrants (1y)3· 0 succeeded
Avg rating4.3★
Avg reviews1,308

Top 10mm レンチ 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 take 41% of clicks — established leaders, but buyers still shop beyond them.

¥0¥92K¥183K¥275K¥367K101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

Brands

20 falling

Sellers

85

Top-5 brand share

61%

Top 20: 100%

Top-5 click share

41%

Top 20: 84%

Open market

33%

  • トネ(TONE)26%
  • Amazonベーシック(Amazon Basics)11%
  • TAKAGI10%
  • DFsucces8%
  • FLZOSPER6%
  • trad(トラッド)6%

10mm レンチ demand & seasonality

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

Volume53KCVR5.5%Products35Brands20Top 5 Brands61%OOS Rate2.1%Rating4.3★Reviews1,308Avg BSR#34
1K750Spike '24Holiday '24Prime Day '25Spike '25Black Friday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Apr · busiest ÷ quietest = 2.3×

Top 10mm レンチ search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

  • 10mm レンチ14K/yr
  • 10mm ラチェットレンチ9K/yr
  • メガネレンチ 10mm8K/yr
  • レンチ 10mm6K/yr
  • 10mm6K/yr
  • 10ミリレンチ5K/yr
  • ラチェットレンチ 10mm6K/yr

What reviews say buyers love and hate about 10mm レンチ

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

What buyers love

78% of reviews
使用の容易さ32%

使えます

コストパフォーマンス19%

お手頃でコスパ良いです。

総合品質8%

ケースの作りが良い

サイズ全体6%

FIT GR バッテリー交換にシンデレラフィット。 10mm購入。この小ささと貫通ソケットは、補機バッテリの交換用車載工具にぴったり。FIT GR用

強さ3%

手頃な大きさでギアも強い。

What buyers complain about

55% of reviews
耐久性11%

耐久性は分かりませんが

サイズ全体10%

小さいが使いやすい

使用の容易さ10%

使いづらい

強さ5%

ケースがイマイチ

総合品質5%

ゴミ

10mm レンチ return rate & reasons

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

0.5%

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
36%
2不良材料/部品
13%
3機能全体
9%
4総合品質
5%
5互換性-全体
5%

Common 10mm レンチ questions

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

Flapen scores 10mm レンチ 63/100 on Amazon Japan — Worth a look. The niche generates ¥2.3M/yr across 35 tracked products. 0 of 3 products launched in the last 360 days are still selling. Search demand moved -2.3% over the last 90 days.
Search demand for 10mm レンチ on Amazon Japan peaks in Apr, where the busiest month runs 2.3× the quietest.