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63

メジャー 50m

Launch it

A $8.7M/yr market growing +17.6% this quarter with returns at 0.6% — clears our launch bar.

Market size 100Growth 47Conversion 79Competition 31Returns 97Price range 0Avg price 0Brand share 59Review moat 84Quality gap 90

Market size

Incredible¥8.7M

¥8.7M/yr · 39K searches

Returns

Incredible0.6%

return rate — above 5% kills the launch gate

Quality gap

Great4.1★

avg incumbent rating — lower means beatable quality

Review moat

Great322.75

avg incumbent reviews — the moat a new listing must climb

Conversion

Great8.1%

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

Brand share

Good70%

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

Growth

Okay+17.6%

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

Competition

Okay67%

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

Avg price

Bad¥2779.88

avg listing price — sweet spot $15–$100

Price range

Bad¥1162.52–¥9178.39

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

According to Flapen's Amazon Japan niche tracking, メジャー 50m is a ¥8.7M/yr Amazon Japan market (39K searches/yr). The top 5 brands hold 70% of demand. Demand peaks in May. Verdict: Launch it — 63/100.

Data updated Jul 31, 2026 · scored weekly · How we score niches

メジャー 50m market data

Units sold / yr
3K–3K
avg 100–250/product
Revenue / yr
¥6.9M–¥8.3M
units × avg price
Conversion rate
8.1%
Avg BSR
#138
Page quality
0%
Prime
100%
Sponsored
63%
Out of stock
7.0%
Avg brand age
65 months
Avg seller age
172 days

Competition & brand share

The top 5 products take 67% of clicks — established leaders, but buyers still shop beyond them.

Brands

14 falling

Sellers

89

Top-5 brand share

70%

Top 20: 100%

Top-5 click share

67%

Top 20: 100%

Open market

24%

  • Amazonベーシック(Amazon Basics)26%
  • Charmoon14%
  • Krovat12%
  • タジマ9%
  • ヤマヨ測定機(Yamayo Sokuteiki)8%
  • Komelon6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +17.6% search growth over the last 90 days.
1K600Spike '24Spike '25Spike '26SepDecMarJunAugNovMarMay

Peak months: May · busiest ÷ quietest = 1.8×

Top メジャー 50m search terms

  • メジャー 50m17K/yr
  • 巻き尺 50m6K/yr
  • 巻尺 50m11K/yr
  • 50mメジャー4K/yr
All search terms

Top メジャー 50m 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%¥865K20%¥1.7M30%¥2.6M40%¥3.5M1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

All 16 tracked products in this niche — three views at once, no toggling.

What buyers say about メジャー 50m

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

What buyers love

使用の容易さ29%

“持っておくと便利”

軽い21%

“本体は軽量かつコンパクト。”

コストパフォーマンス9%

“お値段以上”

総合品質6%

“ちょうど良いサイズで、動きもスムーズ。いい品と思います。”

サイズ全体5%

“ちょうど良いサイズで、動きもスムーズ。”

握り心地3%

“ハンドルはちゃんとグリップを持って回した時に手に当たらないようにオフセットされて、畳むとノブがグリップに収まります。”

測定/読み取り精度3%

“夏場はふにゃるが精度に問題なし。”

強さ2%

“このお値段なのにしっかりしてます”

柔らかい感触2%

“巻き取りなど滑らかな操作性で良いです。”

持ち運びやすさ2%

“DIYでの利用から仕事作業でのツールとしても、存分に活躍してくれる工具だと思います。”

What buyers complain about

耐久性10%

“直ぐに壊れる”

使用の容易さ9%

“不便です”

サイズ全体8%

“おおきさ. 直径15cmなので、直径10cm製よりも安心感がある”

強さ7%

“使いにくくなってしまったので、新しい別の丈夫そうなものを買い直します。”

匂い6%

“目立った汚れあり、匂いもひどい”

コストパフォーマンス6%

“値段が安いから仕方ないのか...”

取り付け6%

“ナットがついてなくて、品物を開けた瞬間ボルトが落ちました。”

総合品質6%

“あまり良い製造状況ではないようです”

厚み4%

“メジャー部分も薄めな感じで軽量なだけに耐久性はちょっと落ちそうな感じはあります。”

印刷の品質3%

“少し引っ張り出してみると印刷面が汚れと言うか折れた傷のような感じになっていました”

Top return reasons

不良材料/部品39%
総合品質22%
サイズ全体11%
伸縮性/拡張性/弾力性6%
広告と実際の製品の違い6%
測定/読み取り精度6%
6%
機能全体6%

Common questions

Is メジャー 50m profitable to sell on Amazon Japan?
The niche generates ¥8.7M/yr across 16 tracked products. 4 of 4 products launched in the last 360 days are still selling. 90-day search growth is +17.6%. Flapen's verdict: Launch it (63/100).
How competitive is the メジャー 50m niche?
14 brands and 89 sellers compete. The top 5 products take 67% of clicks and top 5 brands hold 70% of demand.
What do buyers complain about in メジャー 50m?
Top complaints mined from reviews: 耐久性, 使用の容易さ, サイズ全体. The return rate is 0.6%.
When does demand for メジャー 50m peak?
Demand peaks in May; the busiest month runs 1.8× the quietest.
What does it cost to enter the メジャー 50m niche?
Listings span ¥1162.52–¥9178.39; the average listing price is ¥2779.88 (sweet spot $15–$100). The average incumbent carries 323 reviews — the moat a new listing must climb.