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100v 延長コード

100v 延長コード shows low returns (0.4%), but pricing outside the sweet spot ($939.20 avg) keeps it on the watch list.

Flapen Score

55
Worth a look

Ranks 2,433 of 4,191 DIY・工具・ガーデン niches · −2 vs the category median of 57

Market size 77Growth 27Conversion 33Competition 79Returns 98Price range 0Avg price 0Brand share 55Review moat 41Quality gap 65
This niche Category average · 4,191 niches

Is 100v 延長コード profitable on Amazon?

According to Flapen's Amazon Japan niche tracking, 100v 延長コード is a ¥947K/yr Amazon Japan market (38K searches/yr). The top 5 brands hold 72% of demand. Demand peaks in Feb–Nov. Verdict: Worth a look — 55/100.

100v 延長コード: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Worth a look. Search demand moved +1.8% over the last 90 days and 2.6% of searches end in a purchase.

¥947K

revenue / yr

Units sold / yr2K
Search volume / yr+1.8%38K
Conversion rate2.6%
Avg price¥939.20

Who owns the niche?

The top 5 brands hold 72% of demand, so 28% of the market is open.

28%

open market share

Brands · sellers17 · 87
Top-5 product click share36%
Open market28%
Avg brand age49 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.4★ — the gap to enter on.

0/100

page quality · 40 products

Sponsored placement73%
New entrants (1y)7· 4 succeeded
Avg rating4.4★
Avg reviews2,445

Top 100v 延長コード 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

Clicks spread well past the top 5 (36% combined) — an open shelf where new products get seen.

¥0¥38K¥76K¥114K¥151K1101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

17 falling

Sellers

87

Top-5 brand share

72%

Top 20: 100%

Top-5 click share

36%

Top 20: 79%

Open market

23%

  • エレコム(ELECOM)28%
  • サンワサプライ(Sanwa Supply)20%
  • AKIRARI13%
  • オーム(OHM)6%
  • 宏和工業5%
  • KOTUBAME5%

100v 延長コード demand & seasonality

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

Volume38KCVR2.6%Products40Brands17Top 5 Brands72%OOS Rate1.2%Rating4.4★Reviews2,445Avg BSR#33
2K1KSpike '25Black Friday '25Spike '26Prime Day '26JulAugSepOctNovDecJanFebMarAprMayJunJul

Peak months: Feb, Nov · busiest ÷ quietest = 1.7×

Top 100v 延長コード search terms shoppers use

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

  • 100v 延長コード13K/yr
  • 電源延長ケーブル7K/yr
  • 電源ケーブル 延長7K/yr
  • 1500w 延長コード6K/yr
  • 延長プラグ6K/yr

What reviews say buyers love and hate about 100v 延長コード

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

What buyers love

79% of reviews
使用の容易さ27%

普通に使えます

コストパフォーマンス18%

お手頃価格

総合品質10%

これで良い. 企業のエレコムの信頼.

強さ5%

丈夫そう

サイズ全体5%

ちょうどいい大きさ

What buyers complain about

59% of reviews
総合品質14%

ゴミ

耐久性8%

1ヶ月そこそこで断線。 1ヶ月程で断線。

サイズ全体8%

とにかく小さく邪魔に成らない

使用の容易さ5%

とにかく外れやすい。

コストパフォーマンス5%

ちょっと高いかな

100v 延長コード 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サイズ全体
16%
2互換性-全体
11%
3広告と実際の製品の違い
9%
4充電
7%
5接続性 - 全体
7%

Common 100v 延長コード questions

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

Flapen scores 100v 延長コード 55/100 on Amazon Japan — Worth a look. The niche generates ¥947K/yr across 40 tracked products. 4 of 7 products launched in the last 360 days are still selling. Search demand moved +1.8% over the last 90 days.
Search demand for 100v 延長コード on Amazon Japan peaks in Feb–Nov, where the busiest month runs 1.7× the quietest.