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72

ダクトファン 100mm

Launch it

A $3.7M/yr market growing +47.0% this quarter with returns at 0.7% — clears our launch bar.

Market size 96Growth 67Conversion 26Competition 95Returns 97Price range 0Avg price 0Brand share 68Review moat 92Quality gap 96

Returns

Incredible0.7%

return rate — above 5% kills the launch gate

Market size

Incredible¥3.7M

¥3.7M/yr · 30K searches

Quality gap

Incredible3.9★

avg incumbent rating — lower means beatable quality

Competition

Incredible19%

top-5 click share — an open shelf

Review moat

Great160.8

avg incumbent reviews — the moat a new listing must climb

Brand share

Good64%

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

Growth

Good+47.0%

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

Conversion

Okay2.1%

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

Avg price

Bad¥5906.10

avg listing price — sweet spot $15–$100

Price range

Bad¥1761.42–¥17540.36

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

According to Flapen's Amazon Japan niche tracking, ダクトファン 100mm is a ¥3.7M/yr Amazon Japan market (30K searches/yr). The top 5 brands hold 64% of demand. Demand peaks in Jul. Verdict: Launch it — 72/100.

Data updated Jul 30, 2026 · scored weekly · How we score niches

ダクトファン 100mm market data

Units sold / yr
500–750
avg 0–100/product
Revenue / yr
¥3.0M–¥4.4M
units × avg price
Conversion rate
2.1%
Avg BSR
#222
Page quality
0%
Prime
99%
Sponsored
91%
Out of stock
13.6%
Avg brand age
54 months
Avg seller age
163 days

Competition & brand share

Clicks spread well past the top 5 (19% combined) — an open shelf where new products get seen.

Brands

22 rising

Sellers

73

Top-5 brand share

64%

Top 20: 99%

Top-5 click share

19%

Top 20: 56%

Open market

30%

  • Hon&Guan21%
  • Sidvkut17%
  • SAILFLO10%
  • Okryain10%
  • BreeRainz7%
  • MechCore6%

Demand & seasonality

Weekly Amazon search volume, last 55 weeks — +47.0% search growth over the last 90 days.
1K800Black Friday '25Spike '26Prime Day '26JulAugSepOctNovDecJanFebMarAprMayJunJul

Peak months: Jul · busiest ÷ quietest = 2.5×

Top ダクトファン 100mm search terms

  • ダクトファン 100mm13K/yr
  • ダクトファン 150mm9K/yr
  • 塗装ブース ファン8K/yr
All search terms

Top ダクトファン 100mm 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%2%¥73K4%¥147K6%¥220K8%¥293K1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

What buyers say about ダクトファン 100mm

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

What buyers love

コストパフォーマンス15%

“コスパOK”

組み立て/インストール8%

“中間取付形なのでダクトの途中にすっきり設置でき、省エネ設計で電気代を気にせず24時間使えます。”

使用の容易さ8%

“お手軽DIY”

騒音レベル7%

“轟音扇風機に最適”

総合品質6%

“長く使えるフルスペックモデル”

加熱6%

“状況に合わせて必要最低限の風量に絞って換気を行えるため、部屋の冷暖房効率を大きく落とさずに使える点が気に入っています。”

耐久性5%

“長く使えるフルスペックモデル”

強さ5%

“日中は少し強めにと、. 細かく調整できます。”

コンパクトさ4%

“サイズも比較的コンパクトで設置しやすく、塗装ブースや換気用途、ペット周りの空気循環など幅広く使いやすいと思います。”

広告と実際の製品の違い3%

“期待通り”

What buyers complain about

耐久性9%

“1年ちょっとで壊れました。”

騒音レベル8%

“音はそこまでうるさくなく、最弱だと無音に近いです。”

匂い7%

“スイッチの部分が臭すぎます。”

強さ7%

“弱すぎ”

組み立て/インストール7%

“作り方が複雑で、苦労してしまいました。”

サイズ全体6%

“思いのほか小さかった笑”

機能全体5%

“最初から全く作動しなかった”

コストパフォーマンス3%

“値段なりかな💦”

接続性 - 全体3%

“スイッチのオンオフで同じ所に繋いでるモニターが一瞬落ちたりします。”

使用の容易さ3%

“頻繁に風量調節をしたい人は使いにくいと思う。”

Top return reasons

サイズ全体31%
機能全体22%
広告と実際の製品の違い6%
不良材料/部品5%
騒音レベル4%
接続性 - 全体4%
強さ4%
耐久性4%
組み立て/インストール3%
タッチ/ボタンコントロール3%

Common questions

Is ダクトファン 100mm profitable to sell on Amazon Japan?
The niche generates ¥3.7M/yr across 76 tracked products. 9 of 14 products launched in the last 360 days are still selling. 90-day search growth is +47.0%. Flapen's verdict: Launch it (72/100).
How competitive is the ダクトファン 100mm niche?
22 brands and 73 sellers compete. The top 5 products take 19% of clicks and top 5 brands hold 64% of demand.
What do buyers complain about in ダクトファン 100mm?
Top complaints mined from reviews: 耐久性, 騒音レベル, 匂い. The return rate is 0.7%.
When does demand for ダクトファン 100mm peak?
Demand peaks in Jul; the busiest month runs 2.5× the quietest.
What does it cost to enter the ダクトファン 100mm niche?
Listings span ¥1761.42–¥17540.36; the average listing price is ¥5906.10 (sweet spot $15–$100). The average incumbent carries 161 reviews — the moat a new listing must climb.