Is ブレーカー 30a profitable to sell on Amazon Japan?

The niche generates ¥1.5M/yr across 17 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +18.6%. Flapen's verdict: Launch it (59/100).

How competitive is the ブレーカー 30a niche?

8 brands and 121 sellers compete. The top 5 products take 59% of clicks and top 5 brands hold 91% of demand.

What do buyers complain about in ブレーカー 30a?

Top complaints mined from reviews: 耐久性, 漏れ防止, コストパフォーマンス. The return rate is 0.4%.

When does demand for ブレーカー 30a peak?

Demand is steady year-round — the busiest month runs 1.5× the quietest.

What does it cost to enter the ブレーカー 30a niche?

Listings span ¥742.32–¥5715.88; the average listing price is ¥2160.15 (sweet spot $15–$100). The average incumbent carries 59 reviews — the moat a new listing must climb.

ブレーカー 30a

Launch it

A $1.5M/yr market growing +18.6% this quarter with returns at 0.4% — clears our launch bar.

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Review moat

Incredible59.12

avg incumbent reviews — the moat a new listing must climb

Market size

Great¥1.5M

¥1.5M/yr · 9K searches

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Conversion

Great7.8%

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

Growth

Okay+18.6%

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

Competition

Okay59%

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

Brand share

Bad91%

top-5 brand share — brand-locked demand

Avg price

Bad¥2160.15

avg listing price — sweet spot $15–$100

Price range

Bad¥742.32–¥5715.88

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

Signals High Price

According to Flapen's Amazon Japan niche tracking, ブレーカー 30a is a ¥1.5M/yr Amazon Japan market (9K searches/yr). The top 5 brands hold 91% of demand. Verdict: Launch it — 59/100.

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

ブレーカー 30a market data

Units sold / yr: 500–750; avg 0–100/product
Revenue / yr: ¥1.1M–¥1.6M; units × avg price
Conversion rate: 7.8%
Avg BSR: #353
Page quality: 0%
Prime: 82%
Sponsored: 41%
Out of stock: 1.3%
Avg brand age: 74 months
Avg seller age: 141 days

Competition & brand share

The top 5 products take 59% of clicks — established leaders, but buyers still shop beyond them.

Brands

8 rising

Sellers

121

Top-5 brand share

91%

Top 20: 100%

Top-5 click share

59%

Top 20: 100%

Open market

パナソニック(Panasonic)62%
テンパール12%
ノーブランド品7%
マクサー電機6%
RAISE UP4%
東芝(TOSHIBA)4%
Open — no brand owns it (2 brands, 5%)

Demand & seasonality

Weekly Amazon search volume, last 57 weeks — +18.6% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.5×

Open Trend

Top ブレーカー 30a 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★)1 product missing review or click data not plotted

All 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

パナソニック(Panasonic) 安全ブレーカ HB型 BS1113

パナソニック(Panasonic)¥1112.544.3★140 rev

パナソニック(Panasonic) 安全ブレーカ HB型 2P2E 30A BS2023

パナソニック(Panasonic)¥1477.944.4★107 rev

パナソニック(Panasonic) 安全ブレーカHB型 30AF 2P1E 20A BS1112

パナソニック(Panasonic)¥742.324.3★245 rev

パナソニック(Panasonic) コンパクトブレーカSH型2P2E30A BSH2302

パナソニック(Panasonic)¥1681.494.5★144 rev

テンパール(Tempearl) Eシリーズ経済タイプ配線用遮断器 B-33EC(3P・3E・30AF)

テンパール¥2716.204.4★28 rev

Newest

by launch date

BCWA330 サーキットブレーカパナ二ソック BCWA 型 (モータ保護兼用) BCWA-30 BCWA30 3P30A (BCW330 の後継品仕様違い)

ノーブランド品¥3394.290 rev

10mo ago

パナソニック(Panasonic) 安全ブレーカHB型 30AF 2P1E 20A BS1112

パナソニック(Panasonic)¥742.32245 rev

2y ago

[RAISE UP] サーキットブレーカー遮断器 [30A～300Aまでご用意] 【電圧 12-48Vの範囲でご使用いただけます】自己回復ヒューズメタル車ボートバイク (150A)

RAISE UP¥1841.5724 rev

3y ago

[RAISE UP] サーキットブレーカー遮断器 [30A～300Aまでご用意] 【電圧 12-48Vの範囲でご使用いただけます】自己回復ヒューズメタル車ボートバイク（40A）

RAISE UP¥1831.8915 rev

3y ago

マクサー電機電設用安全ブレーカー 110V 30A 1個入

マクサー電機¥915.033 rev

3y ago

What buyers say about ブレーカー 30a

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

What buyers love

耐久性18%

“問題なく使用中”

総合品質18%

“良い商品です。”

コストパフォーマンス18%

“安価ですね”

使用の容易さ18%

“便利ですよ”

安全基準9%

“安全で便利になりました。”

機能全体5%

“コンパクトなのにスッキリと機能性もある”

コンパクトさ5%

“スッキリコンパクト”

持ち運びやすさ3%

“小型化で便利ですが”

What buyers complain about

耐久性33%

“耐久性信頼は不明です。”

漏れ防止25%

“ブレーカ漏電のテストはしませんでした”

コストパフォーマンス25%

“割と高価なのに悲しいわ”

厚み8%

“本体取付部が薄くて、硬いケーブル配線をした時に電線の張りで”

Top return reasons

不良材料/部品50%

使用の容易さ17%

コストパフォーマンス17%

総合品質17%

Common questions

Is ブレーカー 30a profitable to sell on Amazon Japan?: The niche generates ¥1.5M/yr across 17 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +18.6%. Flapen's verdict: Launch it (59/100).
How competitive is the ブレーカー 30a niche?: 8 brands and 121 sellers compete. The top 5 products take 59% of clicks and top 5 brands hold 91% of demand.
What do buyers complain about in ブレーカー 30a?: Top complaints mined from reviews: 耐久性, 漏れ防止, コストパフォーマンス. The return rate is 0.4%.
When does demand for ブレーカー 30a peak?: Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the ブレーカー 30a niche?: Listings span ¥742.32–¥5715.88; the average listing price is ¥2160.15 (sweet spot $15–$100). The average incumbent carries 59 reviews — the moat a new listing must climb.

ブレーカー 30a

ブレーカー 30a market data

Competition & brand share

Demand & seasonality

Top ブレーカー 30a products on Amazon

Top sellers

Newest

Trending

What buyers say about ブレーカー 30a

What buyers love

What buyers complain about

Top return reasons

Common questions

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