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ブレーカー 30a

ブレーカー 30a clears our launch bar: a $1.5M/yr market growing +18.6% this quarter with returns at 0.4%.

Flapen Score

59
Launch it

Top 39% of 4,191 DIY・工具・ガーデン niches · +2 vs the category median of 57

Market size 86Growth 48Conversion 78Competition 43Returns 98Price range 0Avg price 0Brand share 22Review moat 97Quality gap 80
This niche Category average · 4,191 niches

Is ブレーカー 30a profitable on Amazon?

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.

ブレーカー 30a: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Yes. Search demand moved +18.6% over the last 90 days and 7.8% of searches end in a purchase.

¥1.5M

revenue / yr

Units sold / yr750
Search volume / yr+18.6%9K
Conversion rate7.8%
Avg price¥2160.15

Who owns the niche?

The top 5 brands hold 91% of demand, so 9% of the market is open.

9%

open market share

Brands · sellers8 · 121
Top-5 product click share59%
Open market9%
Avg brand age74 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.2★ — the gap to enter on.

0/100

page quality · 17 products

Sponsored placement41%
New entrants (1y)1· 1 succeeded
Avg rating4.2★
Avg reviews59

Top ブレーカー 30a products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

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

¥0¥73K¥147K¥220K¥293K1101001K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

Brands

8 rising

Sellers

121

Top-5 brand share

91%

Top 20: 100%

Top-5 click share

59%

Top 20: 100%

Open market

5%

  • 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%)

ブレーカー 30a demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume9KCVR7.8%Products17Brands8Top 5 Brands91%OOS Rate1.3%Rating4.2★Reviews59Avg BSR#353
225175Prime Day '25Spike '25Holiday '25Spike '26JulAugSepOctNovDecJanFebMarAprMayJunJul

No pronounced peak months · busiest ÷ quietest = 1.5×

What reviews say buyers love and hate about ブレーカー 30a

What buyers mention most, as a share of all reviews.

What buyers love

94% of reviews
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。

What buyers complain about

92% of reviews
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

ブレーカー 30a return rate & reasons

Why buyers send it back, as a share of all return requests.

0.4%

Return rate

0%

Fixable by listing

The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.

1不良材料/部品
50%
2使用の容易さ
17%
3コストパフォーマンス
17%
4総合品質
17%

Common ブレーカー 30a questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores ブレーカー 30a 59/100 on Amazon Japan — Launch it. The niche generates ¥1.5M/yr across 17 tracked products. 1 of 1 products launched in the last 360 days are still selling. Search demand moved +18.6% over the last 90 days.
Search demand for ブレーカー 30a on Amazon Japan is steady year-round — the busiest month runs 1.5× the quietest.