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M4 10mm

Maybe

An estimated 0.4% of orders come back. But products sell for $550.54 on average, outside the sweet spot, so M4 10mm is a Maybe.

Flapen Score
56
56 / 100
Ranks 2,232 of 4,191 DIY・工具・ガーデン niches · −1 vs the category median of 57
Market size
¥413K/yr10K searches / yr
90-day growth
-10.6%search demand this quarter
Competition
54%top-5 click share · 15 brands · 51 sellers

Flapen Score

M4 10mm against its category

The dotted line is the DIY・工具・ガーデン average. Past it, M4 10mm is stronger. Inside it, weaker.

56Maybe
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The M4 10mm market on Amazon at a glance

Shoppers on Amazon Japan searched for M4 10mm 10K times last year and spent an estimated ¥413K. The top 5 brands take 66% of clicks. Flapen scores it 56 out of 100, a Maybe.

01 · Demand

An estimated 7.7% of those searches ended in a purchase.

Shoppers searched for this 10K times in the last 12 months. That counts every search on Amazon Japan for this niche's terms. An estimated 7.7% of those searches ended in a purchase. Searches in the last 90 days moved -10.6% against the 90 days before. Searches, conversion and average price together put the market at an estimated ¥413K a year.

Searches, last 12 months
10K
Growth, 90 days vs prior 90
-10.6%
Conversion, latest week
7.7%
Market size, estimated
¥413Ka year
Peak month
December1.4× the quietest month
Top search term
m4 10mm6K searches a year

02 · Price

A sale here is worth ¥550.54.

Listings sell for ¥550.54 on average, from ¥299.80 to ¥1147.01. Amazon reports units sold in ranges. This niche sold 500 to 750 a year. The average listing sells 0 to 100 of them. At ¥550.54 that is ¥0 to ¥55K a year per listing.

Average price
¥550.54above the $15 to $100 sweet spot
Price range
¥299.80–¥1147.01
Amazon Japan median price
¥1942.07across 14,733 niches
Units sold a year
500–750
Units per listing a year
0–100
Revenue per listing a year
¥0–¥55K
Returns
0.4%of orders · Amazon Japan median 0.4%

03 · Entry bar

The bar here is low.

72% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 1.2% of listings are out of stock. The average listing ranks #29 within 建築金物. It carries 87 reviews at 4.24 stars, so a new listing needs social proof before a better product.

Sponsored listings
72%
Prime listings
100%
Out of stock, average day
1.2%
Average rank
#29in 建築金物
Average rating
4.24 starsAmazon Japan average 4.15 stars
Average reviews
87per listing
Listings tracked
18

04 · Newcomers

1 of last year's 2 launches cleared the first-year sales bar.

2 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 45 months on average, so the names here are settling in.

Launched, last 12 months
2
Successful launches
1Amazon's first-year sales bar
Average brand age
45 months

Products

Top M4 10mm products & what they sell for

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 31, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 54% of clicks. Leaders hold, but buyers still shop past them.

¥0¥21K¥41K¥62K¥83K1101001K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

Brands

15 rising

Sellers

51

Est. top-5 brand share

66%

Top 20: 100%

Est. top-5 click share

54%

Top 20: 100%

Open market

27%

  • nejico(ネジコ)17%
  • Ysintl16%
  • トラスコ中山(TRUSCO)13%
  • ネジのトミモリ10%
  • SZBRSKJ10%
  • Mikankawa7%

Demand

M4 10mm search demand

Weekly searches over the year, seasonality beneath. Pick a range.

250150Spike '25Prime Day '25Holiday '25Spike '26Prime Day '26MayJunJulAugSepOctNovDecJanFebMarAprMayJunJul

No pronounced peak months · busiest ÷ quietest = 1.4×

Reviews and returns

What reviews say buyers love and hate about M4 10mm

We read the reviews and the return reasons for every product selling here.

32%of positive reviews mention “使用の容易さ”
50%of negative reviews mention “サイズ全体”
0.4%of orders come back
“ヘッドも意外と大きくて、表記通り手回しでシッカリと締められます。”
A buyer, on “サイズ全体”50% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

11 topics

NegativePositive

FAQ

Common M4 10mm questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data