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メジャー 100m

Launch it

A $4.9M/yr market growing +9.5% this quarter with returns at 0.5% — clears our launch bar.

Market size 97Growth 37Conversion 72Competition 34Returns 97Price range 0Avg price 0Brand share 67Review moat 85Quality gap 94

Market size

Incredible¥4.9M

¥4.9M/yr · 20K searches

Returns

Incredible0.5%

return rate — above 5% kills the launch gate

Quality gap

Great4.0★

avg incumbent rating — lower means beatable quality

Review moat

Great296.35

avg incumbent reviews — the moat a new listing must climb

Conversion

Good6.6%

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

Brand share

Good65%

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

Growth

Okay+9.5%

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

Competition

Okay65%

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

Avg price

Bad¥3754.24

avg listing price — sweet spot $15–$100

Price range

Bad¥1149.10–¥16196.90

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

According to Flapen's Amazon Japan niche tracking, メジャー 100m is a ¥4.9M/yr Amazon Japan market (20K searches/yr). The top 5 brands hold 65% of demand. Verdict: Launch it — 62/100.

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

メジャー 100m market data

Units sold / yr
1K–2K
avg 0–100/product
Revenue / yr
¥4.7M–¥5.6M
units × avg price
Conversion rate
6.6%
Avg BSR
#157
Page quality
0%
Prime
80%
Sponsored
75%
Out of stock
7.4%
Avg brand age
62 months
Avg seller age
179 days

Competition & brand share

The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.

Brands

18 flat

Sellers

61

Top-5 brand share

65%

Top 20: 100%

Top-5 click share

65%

Top 20: 100%

Open market

29%

  • Amazonベーシック(Amazon Basics)21%
  • Krovat15%
  • Charmoon12%
  • Komelon9%
  • 近与(KONYO)8%
  • ヤマヨ測定機(Yamayo Sokuteiki)6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +9.5% search growth over the last 90 days.
600400Spike '24Holiday '24Spike '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.5×

Top メジャー 100m search terms

  • メジャー 100m11K/yr
  • 100mメジャー5K/yr
  • 巻き尺 100m3K/yr
All search terms

Top メジャー 100m 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%¥492K20%¥985K30%¥1.5M40%¥2.0M1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

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

What buyers say about メジャー 100m

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

What buyers love

使用の容易さ49%

“あれば便利”

強さ12%

“丈夫そうです。”

総合品質12%

“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。”

コストパフォーマンス11%

“コスパいい!”

軽い6%

“軽い、壊れにくい、バッグ付きで満足。”

サイズ全体4%

“100mタイプとしては持ち運びしやすいサイズ感でした。”

耐久性2%

“耐久性はそれなりにあります。”

コンパクトさ1%

“本体は思ったよりコンパクトで、100mタイプとしては持ち運びしやすいサイズ感でした。”

持ち運びやすさ1%

“本体は思ったよりコンパクトで、100mタイプとしては持ち運びしやすいサイズ感でした。”

What buyers complain about

サイズ全体19%

“おおきさ. 直径15cmなので、直径10cm製よりも安心感がある”

商品の状態13%

“中古品です。”

耐久性13%

“すぐに壊れた。メジャーもすぐに切れました。”

不良材料/部品13%

“不良品”

強さ13%

“ただ頑丈には出来ていないので、寿命は短いと思います。”

保管容量6%

“この大きさを突っ込むスペースはありませんでした。”

総合品質6%

“安物は安物”

コストパフォーマンス6%

“2000円を溝に捨てた気分で悲しいです。”

重い4%

“重いです。”

Top return reasons

不良材料/部品45%
握り心地10%
広告と実際の製品の違い10%
総合品質10%
使用の容易さ10%
商品の状態5%
伸縮性/拡張性/弾力性5%
取り付け3%
清掃の容易さ3%

Common questions

Is メジャー 100m profitable to sell on Amazon Japan?
The niche generates ¥4.9M/yr across 20 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +9.5%. Flapen's verdict: Launch it (62/100).
How competitive is the メジャー 100m niche?
18 brands and 61 sellers compete. The top 5 products take 65% of clicks and top 5 brands hold 65% of demand.
What do buyers complain about in メジャー 100m?
Top complaints mined from reviews: サイズ全体, 商品の状態, 耐久性. The return rate is 0.5%.
When does demand for メジャー 100m peak?
Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the メジャー 100m niche?
Listings span ¥1149.10–¥16196.90; the average listing price is ¥3754.24 (sweet spot $15–$100). The average incumbent carries 296 reviews — the moat a new listing must climb.