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水中ポンプ 12v

水中ポンプ 12v clears our launch bar: a $8.9M/yr market growing +48.2% this quarter with returns at 0.9%.

Flapen Score

72
Launch it

Top 3% of 4,191 DIY・工具・ガーデン niches · +15 vs the category median of 57

Market size 100Growth 68Conversion 40Competition 71Returns 96Price range 0Avg price 0Brand share 81Review moat 92Quality gap 99
This niche Category average · 4,191 niches

Is 水中ポンプ 12v profitable on Amazon?

According to Flapen's Amazon Japan niche tracking, 水中ポンプ 12v is a ¥8.9M/yr Amazon Japan market (63K searches/yr). The top 5 brands hold 54% of demand. Demand peaks in Jul–Aug. Verdict: Launch it — 72/100.

水中ポンプ 12v: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Yes. Search demand moved +48.2% over the last 90 days and 3.2% of searches end in a purchase.

¥8.9M

revenue / yr

Units sold / yr2K
Search volume / yr+48.2%63K
Conversion rate3.2%
Avg price¥4404.27

Who owns the niche?

The top 5 brands hold 54% of demand, so 46% of the market is open.

46%

open market share

Brands · sellers24 · 72
Top-5 product click share42%
Open market46%
Avg brand age47 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 3.6★ — the gap to enter on.

0/100

page quality · 31 products

Sponsored placement68%
New entrants (1y)2· 2 succeeded
Avg rating3.6★
Avg reviews165

Top 水中ポンプ 12v 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 42% of clicks — established leaders, but buyers still shop beyond them.

¥0¥357K¥714K¥1.1M¥1.4M101001K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

24 falling

Sellers

72

Top-5 brand share

54%

Top 20: 97%

Top-5 click share

42%

Top 20: 90%

Open market

40%

  • Tencen17%
  • ルボナリエ12%
  • AeKeatDa10%
  • Marintec9%
  • G&G6%
  • Sutekus6%

水中ポンプ 12v demand & seasonality

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

Volume63KCVR3.2%Products31Brands24Top 5 Brands54%OOS Rate10.8%Rating3.6★Reviews165Avg BSR#45
2K2KSpike '25Prime Day '25Black Friday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Jul, Aug · busiest ÷ quietest = 2.5×

Top 水中ポンプ 12v search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

  • 水中ポンプ 12v24K/yr
  • 12v ポンプ12K/yr
  • 海水ポンプ12K/yr
  • ポンプ 12v4K/yr
  • 12v 水中ポンプ3K/yr
  • 12v水中ポンプ3K/yr
  • 海水用水中ポンプ4K/yr

What reviews say buyers love and hate about 水中ポンプ 12v

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

What buyers love

71% of reviews
コストパフォーマンス14%

お手頃

使用の容易さ11%

水換え楽ちん

モーターのパワー8%

12vでもハイパワー

総合品質8%

商品自体は良さそうで普通の使い方であれば大丈夫だと思うが、ハードな現場には耐えられないのかも。

圧力7%

水の勢いも良かった。

What buyers complain about

71% of reviews
耐久性29%

3ヶ月 海水に浸けていたら 壊れた

水に強い9%

スイッチは防水ではない

サイズ全体7%

思っていたより小さくてびっくりしたが

生锈/腐食する5%

中身が錆びて動かなくなっていた

強さ4%

壊れやすいかも

水中ポンプ 12v return rate & reasons

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

0.9%

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機能全体
23%
2不良材料/部品
13%
3広告と実際の製品の違い
8%
4互換性-全体
7%
5サイズ全体
7%

Common 水中ポンプ 12v questions

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

Flapen scores 水中ポンプ 12v 72/100 on Amazon Japan — Launch it. The niche generates ¥8.9M/yr across 31 tracked products. 2 of 2 products launched in the last 360 days are still selling. Search demand moved +48.2% over the last 90 days.
Search demand for 水中ポンプ 12v on Amazon Japan peaks in Jul–Aug, where the busiest month runs 2.5× the quietest.