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延長コード 50cm

延長コード 50cm shows a $5.9M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Flapen Score

59
Worth a look

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

Market size 98Growth 21Conversion 79Competition 61Returns 98Price range 0Avg price 0Brand share 52Review moat 53Quality gap 60
This niche Category average · 4,191 niches

Is 延長コード 50cm profitable on Amazon?

According to Flapen's Amazon Japan niche tracking, 延長コード 50cm is a ¥5.9M/yr Amazon Japan market (88K searches/yr). The top 5 brands hold 74% of demand. Demand peaks in Jan–Nov–Dec. Verdict: Worth a look — 59/100.

延長コード 50cm: 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 -7.1% over the last 90 days and 8.0% of searches end in a purchase.

¥5.9M

revenue / yr

Units sold / yr8K
Search volume / yr-7.1%88K
Conversion rate8.0%
Avg price¥835.71

Who owns the niche?

The top 5 brands hold 74% of demand, so 26% of the market is open.

26%

open market share

Brands · sellers16 · 64
Top-5 product click share49%
Open market26%
Avg brand age48 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 · 27 products

Sponsored placement67%
New entrants (1y)4· 2 succeeded
Avg rating4.4★
Avg reviews1,389

Top 延長コード 50cm 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 49% of clicks — established leaders, but buyers still shop beyond them.

¥0¥235K¥469K¥704K¥939K1101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

16 rising

Sellers

64

Top-5 brand share

74%

Top 20: 100%

Top-5 click share

49%

Top 20: 94%

Open market

20%

  • オーム(OHM)28%
  • サンワサプライ(Sanwa Supply)15%
  • エレコム(ELECOM)12%
  • TESSAN11%
  • KOZATO8%
  • ANPEI-ELEC6%

延長コード 50cm demand & seasonality

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

Volume88KCVR8.0%Products27Brands16Top 5 Brands74%OOS Rate6.5%Rating4.4★Reviews1,389Avg BSR#72
5K4KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Jan, Nov, Dec · busiest ÷ quietest = 2.2×

Top 延長コード 50cm search terms shoppers use

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

  • 延長コード 50cm46K/yr
  • 延長コード 0.5m22K/yr
  • 延長コード0.5m6K/yr
  • 延長コード 0.55K/yr
  • 延長コード 50cm 黒4K/yr
  • 延長コード 短い 0.5m4K/yr

What reviews say buyers love and hate about 延長コード 50cm

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

What buyers love

75% of reviews
使用の容易さ18%

机まわりをすっきりまとめやすいUSB付き電源タップ

コストパフォーマンス10%

お手頃価格

サイズ全体10%

大型アダプターもスムーズに収まる

充電8%

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。

コネクタ/ポート/プラグ7%

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。

What buyers complain about

50% of reviews
厚み12%

ケーブルは太く固め。

耐久性7%

すぐ使えなくなった

総合品質6%

安い

サイズ全体6%

50cmでは短かった。

コネクタ/ポート/プラグ4%

極性付きプラグは物理的に使用できません

延長コード 50cm 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
17%
2互換性-全体
14%
3コネクタ/ポート/プラグ
11%
4不良材料/部品
9%
5広告と実際の製品の違い
9%

Common 延長コード 50cm questions

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

Flapen scores 延長コード 50cm 59/100 on Amazon Japan — Worth a look. The niche generates ¥5.9M/yr across 27 tracked products. 2 of 4 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 50cm on Amazon Japan peaks in Jan–Nov–Dec, where the busiest month runs 2.2× the quietest.