Is 換気扇 20cm profitable to sell on Amazon Japan?

The niche generates ¥5.3M/yr across 16 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +22.2%. Flapen's verdict: Launch it (57/100).

How competitive is the 換気扇 20cm niche?

8 brands and 119 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 92% of demand.

What do buyers complain about in 換気扇 20cm?

Top complaints mined from reviews: 材料の品質, コストパフォーマンス, 騒音レベル. The return rate is 0.6%.

When does demand for 換気扇 20cm peak?

Demand peaks in Jul–Aug; the busiest month runs 2.0× the quietest.

What does it cost to enter the 換気扇 20cm niche?

Listings span ¥2660.31–¥8673.27; the average listing price is ¥4727.76 (sweet spot $15–$100). The average incumbent carries 116 reviews — the moat a new listing must climb.

換気扇 20cm

Launch it

A $5.3M/yr market growing +22.2% this quarter with returns at 0.6% — clears our launch bar.

Market size

Incredible¥5.3M

¥5.3M/yr · 32K searches

Returns

Incredible0.6%

return rate — above 5% kills the launch gate

Review moat

Great116.38

avg incumbent reviews — the moat a new listing must climb

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Growth

Good+22.2%

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

Conversion

Okay3.5%

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

Competition

Okay61%

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

Brand share

Bad92%

top-5 brand share — brand-locked demand

Avg price

Bad¥4727.76

avg listing price — sweet spot $15–$100

Price range

Bad¥2660.31–¥8673.27

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

Signals Low Review Barrier High Price

According to Flapen's Amazon Japan niche tracking, 換気扇 20cm is a ¥5.3M/yr Amazon Japan market (32K searches/yr). The top 5 brands hold 92% of demand. Demand peaks in Jul–Aug. Verdict: Launch it — 57/100.

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

換気扇 20cm market data

Units sold / yr: 1K–1K; avg 0–100/product
Revenue / yr: ¥4.7M–¥5.9M; units × avg price
Conversion rate: 3.5%
Avg BSR: #147
Page quality: 0%
Prime: 75%
Sponsored: 44%
Out of stock: 0.4%
Avg brand age: 49 months
Avg seller age: 155 days

Competition & brand share

The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.

Brands

8 falling

Sellers

119

Top-5 brand share

92%

Top 20: 100%

Top-5 click share

61%

Top 20: 100%

Open market

高須産業(Takasu Sangyo)40%
パナソニック(Panasonic)24%
Umillion13%
YUASA PRIMUS10%
オーム（OHM）4%
日本電興株式会社3%
Open — no brand owns it (2 brands, 4%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +22.2% search growth over the last 90 days.

Peak months: Jul, Aug · busiest ÷ quietest = 2.0×

Open Trend

Top 換気扇 20cm 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

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

Top sellers

by 90-day click share

高須産業一般換気扇20ｃｍ FTD-200

高須産業(Takasu Sangyo)¥2660.314.2★353 rev

パナソニック一般換気扇スタンダードタイプ排気･引きひも連動式シャッター 20cm FY-20P6

パナソニック(Panasonic)¥4223.944.2★67 rev

Umillion 換気扇給排気両方向吸排気ファン 20cm 引き紐連動シャッター過熱保護付逆流防止可能一般換気扇通気用台所/居間/洗面所/トイレ/ペットの部屋/キッチン/ガレージ用

Umillion¥4323.105.0★2 rev

TSK 一般換気扇 20cm FT-200

高須産業(Takasu Sangyo)¥3117.164.3★29 rev

高須産業 FFB-200 (20cm) 一般換気扇 (フィルタータイプ)引き紐連動シャッター

高須産業(Takasu Sangyo)¥3332.353.8★81 rev

Newest

by launch date

Umillion¥4323.102 rev

7mo ago

Umillion 換気扇双方向吸排気ファンシャッター付 20cm 487m³/h大風量引きひも操作過熱保護付純銅モーター一般換気扇換気ファン通気用屋根裏/居間/洗面所/トイレ/ペットの部屋/キッチン/ガレージ用

Umillion¥4197.882 rev

7mo ago

Okryain 換気扇 200mm 金属製中間取付形ダクトファン業務用大風量強力 ON/OFFスイッチ付きダクト用換気扇排気専用工場・作業所・倉庫用 (200mm-黒)

Okryain¥5764.2750 rev

2y ago

パナソニック一般換気扇スタンダードタイプ排気･引きひも連動式シャッター 20cm FY-20P6

パナソニック(Panasonic)¥4223.9467 rev

2y ago

パナソニック(Panasonic) 一般換気扇 FY-20EF6

パナソニック(Panasonic)¥8493.273 rev

2y ago

What buyers say about 換気扇 20cm

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

What buyers love

組み立て/インストール30%

“取り付けは簡単で、良い商品です”

コストパフォーマンス25%

“リーズナブル”

騒音レベル20%

“静かです”

サイズ全体5%

“コンパクトなサイズでフード内に収まりました。”

総合品質4%

“良い商品だと思います。”

使用の容易さ3%

“お手入れがしやすそうです。”

軽い3%

“小型で軽量”

効率3%

“機能性は問題ありません。”

耐久性3%

“長く使える”

モーターのパワー1%

“パワーもまあまあでよい。”

What buyers complain about

材料の品質30%

“プラスチック”

コストパフォーマンス20%

“安さなりの理由がありました。”

騒音レベル20%

“かなりうるさい”

可燃性10%

“もし火災が起きた場合防火できないと思います。”

組み立て/インストール7%

“説明書は良く読まないといけませんね🥲取り付け時間は取り外しも含め、ボルトでモタモタしたので25分くらいだったかなと思います。”

Top return reasons

サイズ全体78%

機能全体6%

追加アイテム/添付ファイル4%

互換性-全体3%

エシカルトレード/フェアトレード2%

不良材料/部品2%

メカニズムの問題2%

組み立て/インストール2%

厚み1%

Common questions

Is 換気扇 20cm profitable to sell on Amazon Japan?: The niche generates ¥5.3M/yr across 16 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +22.2%. Flapen's verdict: Launch it (57/100).
How competitive is the 換気扇 20cm niche?: 8 brands and 119 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 92% of demand.
What do buyers complain about in 換気扇 20cm?: Top complaints mined from reviews: 材料の品質, コストパフォーマンス, 騒音レベル. The return rate is 0.6%.
When does demand for 換気扇 20cm peak?: Demand peaks in Jul–Aug; the busiest month runs 2.0× the quietest.
What does it cost to enter the 換気扇 20cm niche?: Listings span ¥2660.31–¥8673.27; the average listing price is ¥4727.76 (sweet spot $15–$100). The average incumbent carries 116 reviews — the moat a new listing must climb.

換気扇 20cm

換気扇 20cm market data

Competition & brand share

Demand & seasonality

Top 換気扇 20cm products on Amazon

Top sellers

Newest

Trending

What buyers say about 換気扇 20cm

What buyers love

What buyers complain about

Top return reasons

Common questions

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