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延長コード 7m

延長コード 7m clears our launch bar: a $10.3M/yr market growing +7.1% this quarter with returns at 0.6%.

Flapen Score

58
Launch it

Top 45% of 4,191 DIY・工具・ガーデン niches · +1 vs the category median of 57

Market size 100Growth 34Conversion 56Competition 56Returns 97Price range 0Avg price 0Brand share 48Review moat 42Quality gap 73
This niche Category average · 4,191 niches

Is 延長コード 7m profitable on Amazon?

According to Flapen's Amazon Japan niche tracking, 延長コード 7m is a ¥10.3M/yr Amazon Japan market (110K searches/yr). The top 5 brands hold 76% of demand. Verdict: Launch it — 58/100.

延長コード 7m: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Yes. Search demand moved +7.1% over the last 90 days and 4.8% of searches end in a purchase.

¥10.3M

revenue / yr

Units sold / yr5K
Search volume / yr+7.1%110K
Conversion rate4.8%
Avg price¥1960.90

Who owns the niche?

The top 5 brands hold 76% of demand, so 24% of the market is open.

24%

open market share

Brands · sellers14 · 128
Top-5 product click share51%
Open market24%
Avg brand age54 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.3★ — the gap to enter on.

0/100

page quality · 32 products

Sponsored placement69%
New entrants (1y)2· 2 succeeded
Avg rating4.3★
Avg reviews2,255

Top 延長コード 7m 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 51% of clicks — established leaders, but buyers still shop beyond them.

¥0¥513K¥1.0M¥1.5M¥2.1M101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

14 falling

Sellers

128

Top-5 brand share

76%

Top 20: 100%

Top-5 click share

51%

Top 20: 87%

Open market

24%

  • サンワサプライ(Sanwa Supply)45%
  • エレコム(ELECOM)7%
  • オーム(OHM)6%
  • ANPEI-ELEC6%
  • トラスコ中山(TRUSCO)6%
  • Amazonベーシック(Amazon Basics)6%

延長コード 7m demand & seasonality

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

Volume110KCVR4.8%Products32Brands14Top 5 Brands76%OOS Rate0.0%Rating4.3★Reviews2,255Avg BSR#60
4K3KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Prime Day '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.4×

Top 延長コード 7m search terms shoppers use

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

  • 延長コード 7m36K/yr
  • 延長コード 6m31K/yr
  • 延長コード 8m19K/yr
  • 電源タップ 7m11K/yr
  • 電源タップ 6m6K/yr
  • 電源タップ 8m4K/yr
  • 延長ケーブル 7m3K/yr

What reviews say buyers love and hate about 延長コード 7m

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

What buyers love

81% of reviews
使用の容易さ22%

問題なく使えます

コネクタ/ポート/プラグ11%

USB-Aも含めてポート数があるので、充電器をいくつも持ち歩かなくて済むのは助かります。

コストパフォーマンス11%

低価格

デザイン全体9%

デザインはシンプルで好印象です。

充電7%

あくまでスマホの夜間充電などのおまけ程度として割り切って使っています。

What buyers complain about

57% of reviews
厚み13%

ケーブルは太く固め。

サイズ全体11%

あとはサイズは大きめなので、置く場所が確保できるなら。

総合品質8%

ゴミ

コネクタ/ポート/プラグ5%

最近一部のコンセント口が通電しなくなりました。

充電5%

一部通電しなくなってきた

延長コード 7m return rate & reasons

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

0.6%

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サイズ全体
26%
2コネクタ/ポート/プラグ
14%
3機能全体
12%
4互換性-全体
9%
5不良材料/部品
9%

Common 延長コード 7m questions

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

Flapen scores 延長コード 7m 58/100 on Amazon Japan — Launch it. The niche generates ¥10.3M/yr across 32 tracked products. 2 of 2 products launched in the last 360 days are still selling. Search demand moved +7.1% over the last 90 days.
Search demand for 延長コード 7m on Amazon Japan is steady year-round — the busiest month runs 1.4× the quietest.