Is 200v 延長コード profitable to sell on Amazon Japan?

The niche generates ¥5.1M/yr across 21 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +8.5%. Flapen's verdict: Worth a look (55/100).

How competitive is the 200v 延長コード niche?

11 brands and 102 sellers compete. The top 5 products take 55% of clicks and top 5 brands hold 87% of demand.

What do buyers complain about in 200v 延長コード?

Top complaints mined from reviews: 機能全体. The return rate is 1.0%.

When does demand for 200v 延長コード peak?

Demand peaks in Jul; the busiest month runs 1.8× the quietest.

What does it cost to enter the 200v 延長コード niche?

Listings span ¥1362.33–¥25355.50; the average listing price is ¥7663.92 (sweet spot $15–$100). The average incumbent carries 55 reviews — the moat a new listing must climb.

200v 延長コード

Worth a look

Shows a $5.1M/yr market, but pricing outside the sweet spot ($7663.92 avg) keeps it on the watch list.

Market size

Incredible¥5.1M

¥5.1M/yr · 47K searches

Review moat

Incredible55.48

avg incumbent reviews — the moat a new listing must climb

Returns

Great1.0%

return rate — above 5% kills the launch gate

Quality gap

Great4.1★

avg incumbent rating — lower means beatable quality

Competition

Okay55%

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

Growth

Okay+8.5%

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

Brand share

Okay87%

top-5 brand share — brands hold most of the demand

Conversion

Bad1.4%

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

Avg price

Bad¥7663.92

avg listing price — sweet spot $15–$100

Price range

Bad¥1362.33–¥25355.50

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

Signals Low Review Barrier High Price

According to Flapen's Amazon Japan niche tracking, 200v 延長コード is a ¥5.1M/yr Amazon Japan market (47K searches/yr). The top 5 brands hold 87% of demand. Demand peaks in Jul. Verdict: Worth a look — 55/100.

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

200v 延長コード market data

Units sold / yr: 500–750; avg 0–100/product
Revenue / yr: ¥3.8M–¥5.7M; units × avg price
Conversion rate: 1.4%
Avg BSR: #431
Page quality: 0%
Prime: 67%
Sponsored: 38%
Out of stock: 11.1%
Avg brand age: 53 months
Avg seller age: 184 days

Competition & brand share

The top 5 products take 55% of clicks — established leaders, but buyers still shop beyond them.

Brands

11 falling

Sellers

102

Top-5 brand share

87%

Top 20: 100%

Top-5 click share

55%

Top 20: 100%

Open market

トラスコ中山(TRUSCO)31%
ノーブランド品25%
NICHIDO13%
サンワサプライ(Sanwa Supply)10%
ハタヤ(HATAYA)9%
鯛勝産業4%
Open — no brand owns it (5 brands, 8%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +8.5% search growth over the last 90 days.

Peak months: Jul · busiest ÷ quietest = 1.8×

Open Trend

Top 200v 延長コード search terms

200v 延長コード38K/yr +10.5%0.9% conv.
単相200v 延長コード5K/yr +5.4%0.6% conv.
三相200v 延長コード4K/yr -7.7%2.5% conv.

All search terms

Top 200v 延長コード 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 21 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

【WH4931WP】3m 1個口接地15A·20A兼用200V器具用延長コード 1個口

ノーブランド品¥4573.453.9★10 rev

トラスコ中山(TRUSCO) 三相200V延長コード5m T4P20AW5

トラスコ中山(TRUSCO)¥6900.734.1★96 rev

トラスコ中山(TRUSCO) 三相200V延長コードブラック 10m T4P20AW10

トラスコ中山(TRUSCO)¥9006.934.1★96 rev

ハタヤ (HATAYA) 三相200V型コードリール屋内用 200V型コード10m 太さ2.0㎟コンパクトタイプ接地付コンセント2個コンセント防塵キャップ付き家庭用工場用建設現場 JTIII-102M

ハタヤ(HATAYA)¥8742.204.4★40 rev

TRUSCO(トラスコ) 三相200V延長コード20M

トラスコ中山(TRUSCO)¥15420.104.1★96 rev

Newest

by launch date

パワーエクステンションコード延長コード屋外パワーエクステンションコード 2500W 長さ 2M/3M/5M/10m/15m/20m/30m/ 40m/50m産業用屋内屋外PVC素材雨耐性耐燃性延長延長ソケット延長コード路面電車充電電動工具作業用、電動工具、園芸用具、掃除機、芝刈り機、照明、家庭・商業用 (黒 15メートル)

ノーブランド品¥2716.091 rev

3mo ago

高耐久電源延長コード 2500W対応 - 屋外・室内兼用 2m/3m/5m/10m/15m/20m/選べる長さ PVC材質防雨・難燃性延長ケーブル作業用・電動工具・照明に最適家庭用および商業用 (ブラック 5m)

Notiavy¥2698.671 rev

12mo ago

Share FunN 延長コード屋内用 200V 20A 単相 1m 2m 5m 10m MGC (屋内用 5m)

ShareFunn¥14078.003 rev

1y ago

電源延長コード延長ケーブル屋外電源延長線 2000W 長さ3m/5m/10m/15m/20m/30m/40m 産業用室内屋外 pvc材質防雨難燃性延長コンセント延長コード路面電車充電電動工具草刈機照明掃除機作業用 30メートル (黒色 5m)

FsjDuwj¥1362.335 rev

1y ago

【WH4931WP】3m 1個口接地15A·20A兼用200V器具用延長コード 1個口

ノーブランド品¥4573.4510 rev

1y ago

What buyers say about 200v 延長コード

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

What buyers love

総合品質30%

“よく出来てます”

効率20%

“問題なく使えました。”

持ち運びやすさ20%

“旅行に行く時に便利です。”

伸縮性/拡張性/弾力性10%

“延長に便利”

耐久性10%

“思っていたままの商品で丈夫で使用し易いです。”

充電10%

“USBも充電できるのが便利。”

What buyers complain about

機能全体100%

“このコードだけ100Vも200Vも通電しなかった”

Top return reasons

サイズ全体42%

互換性-全体21%

コネクタ/ポート/プラグ10%

接続性 - 全体10%

出し機構4%

ロープ/ワイヤーの絡まり4%

機能全体4%

広告と実際の製品の違い2%

可燃性2%

Common questions

Is 200v 延長コード profitable to sell on Amazon Japan?: The niche generates ¥5.1M/yr across 21 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +8.5%. Flapen's verdict: Worth a look (55/100).
How competitive is the 200v 延長コード niche?: 11 brands and 102 sellers compete. The top 5 products take 55% of clicks and top 5 brands hold 87% of demand.
What do buyers complain about in 200v 延長コード?: Top complaints mined from reviews: 機能全体. The return rate is 1.0%.
When does demand for 200v 延長コード peak?: Demand peaks in Jul; the busiest month runs 1.8× the quietest.
What does it cost to enter the 200v 延長コード niche?: Listings span ¥1362.33–¥25355.50; the average listing price is ¥7663.92 (sweet spot $15–$100). The average incumbent carries 55 reviews — the moat a new listing must climb.

200v 延長コード

200v 延長コード market data

Competition & brand share

Demand & seasonality

Top 200v 延長コード search terms

Top 200v 延長コード products on Amazon

Top sellers

Newest

Trending

What buyers say about 200v 延長コード

What buyers love

What buyers complain about

Top return reasons

Common questions

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