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延長コード 1.5m

延長コード 1.5m clears our launch bar: a $6.5M/yr market growing +3.9% this quarter with returns at 0.4%.

Flapen Score

61
Launch it

Top 29% of 4,191 DIY・工具・ガーデン niches · +4 vs the category median of 57

Market size 99Growth 30Conversion 52Competition 86Returns 98Price range 0Avg price 0Brand share 43Review moat 47Quality gap 75
This niche Category average · 4,191 niches

Is 延長コード 1.5m profitable on Amazon?

According to Flapen's Amazon Japan niche tracking, 延長コード 1.5m is a ¥6.5M/yr Amazon Japan market (133K searches/yr). The top 5 brands hold 79% of demand. Demand peaks in Jan–Dec. Verdict: Launch it — 61/100.

延長コード 1.5m: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Yes. Search demand moved +3.9% over the last 90 days and 4.2% of searches end in a purchase.

¥6.5M

revenue / yr

Units sold / yr5K
Search volume / yr+3.9%133K
Conversion rate4.2%
Avg price¥1173.52

Who owns the niche?

The top 5 brands hold 79% of demand, so 21% of the market is open.

21%

open market share

Brands · sellers16 · 128
Top-5 product click share29%
Open market21%
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 · 56 products

Sponsored placement59%
New entrants (1y)5· 4 succeeded
Avg rating4.3★
Avg reviews1,814

Top 延長コード 1.5m 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 (29% combined) — an open shelf where new products get seen.

¥0¥196K¥392K¥589K¥785K1101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

16 flat

Sellers

128

Top-5 brand share

79%

Top 20: 100%

Top-5 click share

29%

Top 20: 73%

Open market

18%

  • エレコム(ELECOM)34%
  • オーム(OHM)24%
  • サンワサプライ(Sanwa Supply)12%
  • エルパ(ELPA)5%
  • uxcell4%
  • TOPREK3%

延長コード 1.5m demand & seasonality

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

Volume133KCVR4.2%Products56Brands16Top 5 Brands79%OOS Rate3.6%Rating4.3★Reviews1,814Avg BSR#112
5K3KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Prime Day '26SepDecMarJunAugNovMarMay

Peak months: Jan, Dec · busiest ÷ quietest = 1.9×

Top 延長コード 1.5m search terms shoppers use

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

  • 延長コード 1.5m57K/yr
  • 延長コード1.5m33K/yr
  • 電源タップ 1.5m22K/yr
  • えんちようこーど 1.5m8K/yr
  • 延長コード 1 .5m4K/yr
  • 延長コード 1.55K/yr
  • 延長コード 1.5m 3口4K/yr

What reviews say buyers love and hate about 延長コード 1.5m

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

What buyers love

75% of reviews
使用の容易さ24%

使える

コストパフォーマンス12%

お手頃価格

総合品質9%

リーズナブルで問題なし。

デザイン全体6%

アダプターの使用を考慮した設計

充電6%

スマホワイヤレス充電

What buyers complain about

60% of reviews
充電17%

USB差し込み口から充電出来なくなった

耐久性12%

一カ月と1日で壊れた

コネクタ/ポート/プラグ6%

USB-Aポートのひとつが機能しなくなりました。

サイズ全体5%

サイズ小さめ

総合品質4%

良いか悪いかは分かりませんが

延長コード 1.5m 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充電
23%
2サイズ全体
14%
3コネクタ/ポート/プラグ
11%
4不良材料/部品
7%
5
6%

Common 延長コード 1.5m questions

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

Flapen scores 延長コード 1.5m 61/100 on Amazon Japan — Launch it. The niche generates ¥6.5M/yr across 56 tracked products. 4 of 5 products launched in the last 360 days are still selling. Search demand moved +3.9% over the last 90 days.
Search demand for 延長コード 1.5m on Amazon Japan peaks in Jan–Dec, where the busiest month runs 1.9× the quietest.