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72

水中ポンプ 12v

Launch it

A $8.9M/yr market growing +48.2% this quarter with returns at 0.9% — clears our launch bar.

Market size 100Growth 68Conversion 40Competition 71Returns 96Price range 0Avg price 0Brand share 81Review moat 92Quality gap 99

Market size

Incredible¥8.9M

¥8.9M/yr · 63K searches

Quality gap

Incredible3.6★

avg incumbent rating — lower means beatable quality

Returns

Incredible0.9%

return rate — above 5% kills the launch gate

Review moat

Great164.77

avg incumbent reviews — the moat a new listing must climb

Brand share

Great54%

top-5 brand share — no brand owns this niche

Competition

Good42%

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

Growth

Good+48.2%

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

Conversion

Okay3.2%

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

Avg price

Bad¥4404.27

avg listing price — sweet spot $15–$100

Price range

Bad¥1026.22–¥30342.16

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

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.

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

水中ポンプ 12v market data

Units sold / yr
1K–2K
avg 0–100/product
Revenue / yr
¥5.5M–¥6.6M
units × avg price
Conversion rate
3.2%
Avg BSR
#45
Page quality
0%
Prime
84%
Sponsored
68%
Out of stock
10.8%
Avg brand age
47 months
Avg seller age
174 days

Competition & brand share

The top 5 products take 42% of clicks — established leaders, but buyers still shop beyond them.

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%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +48.2% search growth over the last 90 days.
2K2KSpike '25Prime Day '25Black Friday '25Spike '26SepDecMarJunAugNovMarMay

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

Top 水中ポンプ 12v search terms

  • 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
All search terms

Top 水中ポンプ 12v 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%4%¥357K8%¥714K12%¥1.1M16%¥1.4M101001K 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 水中ポンプ 12v

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

What buyers love

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。”

耐久性7%

“耐久力”

水に強い5%

“水量に満足”

水の流れ4%

“水抜き、給水らくらくです。”

強さ3%

“パワー最高”

騒音レベル3%

“コンパクトで静音、排水量も思った以上にあり大変満足しています。”

What buyers complain about

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”

漏れ防止4%

“流量調整ノブから水が漏れて使えません”

騒音レベル4%

“確かに音はうるさいですが”

コストパフォーマンス3%

“値段なりの勢い”

総合品質3%

“ゴミ”

広告と実際の製品の違い3%

“商品説明と違う”

Top return reasons

機能全体23%
不良材料/部品13%
広告と実際の製品の違い8%
互換性-全体7%
サイズ全体7%
耐久性6%
商品の状態5%
コネクタ/ポート/プラグ4%
水に強い4%
接続性 - 全体3%

Common questions

Is 水中ポンプ 12v profitable to sell on Amazon Japan?
The niche generates ¥8.9M/yr across 31 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +48.2%. Flapen's verdict: Launch it (72/100).
How competitive is the 水中ポンプ 12v niche?
24 brands and 72 sellers compete. The top 5 products take 42% of clicks and top 5 brands hold 54% of demand.
What do buyers complain about in 水中ポンプ 12v?
Top complaints mined from reviews: 耐久性, 水に強い, サイズ全体. The return rate is 0.9%.
When does demand for 水中ポンプ 12v peak?
Demand peaks in Jul–Aug; the busiest month runs 2.5× the quietest.
What does it cost to enter the 水中ポンプ 12v niche?
Listings span ¥1026.22–¥30342.16; the average listing price is ¥4404.27 (sweet spot $15–$100). The average incumbent carries 165 reviews — the moat a new listing must climb.