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delta 3 plus

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Market size 100Growth 19Conversion 3Competition 38Returns 99Price range 0Avg price 0Brand share 0Review moat 95Quality gap 81

Market size

Incredible¥41.6M

¥41.6M/yr · 191K searches

Returns

Incredible0.2%

return rate — above 5% kills the launch gate

Review moat

Great105.24

avg incumbent reviews — the moat a new listing must climb

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Competition

Okay62%

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

Growth

Bad-12.1%

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

Conversion

Bad0.2%

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

Brand share

Bad100%

top-5 brand share — brand-locked demand

Avg price

Bad¥99093.91

avg listing price — sweet spot $15–$100

Price range

Bad¥57054.90–¥185837.78

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

According to Flapen's Amazon Japan niche tracking, delta 3 plus is a ¥41.6M/yr Amazon Japan market (191K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jul–Nov–Dec. Verdict: Skip it — 47/100.

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

delta 3 plus market data

Units sold / yr
1K–1K
avg 0–100/product
Revenue / yr
¥99.1M–¥123.9M
units × avg price
Conversion rate
0.2%
Avg BSR
#72
Page quality
0%
Prime
6%
Sponsored
100%
Out of stock
14.9%
Avg brand age
24 months
Avg seller age
171 days

Competition & brand share

The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.

Brands

1 flat

Sellers

3

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

62%

Top 20: 100%

Open market

0%

  • EF ECOFLOW100%
  • Open — no brand owns it (0%)

Demand & seasonality

Weekly Amazon search volume, last 88 weeks — -12.1% search growth over the last 90 days.
15K10KHoliday '24Spike '25Prime Day '25Black Friday '25Spike '26Prime Day '26DecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun

Peak months: Jul, Nov, Dec · busiest ÷ quietest = 2.6×

Top delta 3 plus search terms

  • エコフローデルタ349K/yr
  • ecoflow delta 3 plus17K/yr
  • デルタ321K/yr
  • エコフロー デルタ 317K/yr
  • ecoflow delta 319K/yr
  • エコフローデルタ3プラス13K/yr
  • デルタ3プラス15K/yr
  • delta 3 plus10K/yr
  • delta 37K/yr
  • delta3 plus3K/yr
All search terms

Top delta 3 plus 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.

0%10%¥4.2M20%¥8.3M30%¥12.5M40%¥16.6M101001K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 17 tracked products in this niche — three views at once, no toggling.

What buyers say about delta 3 plus

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

What buyers love

充電16%

“約3時間でフル充電、中々いい感じです。”

使用の容易さ15%

“シンプルモデル”

持ち運びやすさ11%

“初めてのポータブル電源としても使いやすいサイズ感と容量”

保管容量10%

“大容量”

コストパフォーマンス6%

“コンパクト高コスパモデル”

バッテリーの内蔵6%

“太陽光発電と蓄電池システムは装備していますが、災害対策でもよいと思います。”

総合品質5%

“日常の枠を越えた圧倒的なスペックを誇る、EcoFlowのフラッグシップ級ポータブル電源です。”

騒音レベル3%

“音です。”

耐久性3%

“問題なく使えます。”

軽い3%

“また12キロという重量は決して軽くはありませんが両サイドの持ち手が出っ張りすぎないデザインになっており車への積み込みもスムーズです。”

What buyers complain about

充電12%

“フル充電に少し時間がかかる。”

重い9%

“ただ重い”

耐久性8%

“電源が切れる”

コストパフォーマンス4%

“高価な製品なので購入時のご参考まで。”

機能全体3%

“Ecoflow Delta 3は、Ecoflow Delta 2の機能の一部が使えません。”

保管容量3%

“重量は17.8kgなので、リン酸鉄なので容量から考えたら仕方ないと思われる。”

サイズ全体3%

“到着時に想像より小さな段ボールで届いた(140サイズ).”

バッテリーの内蔵2%

“通常は充電コンセントに繋げれば充電が始まりますが、我が家で言えばソーラー発電時間、また時間帯によって変動する家庭であれば深夜帯などを利用するために、その時間だけ充電をする、というのができません。”

接続性 - 全体2%

“もう携帯に繋がらない”

高さ2%

“もう少し背が低ければなお良いと思います。”

Top return reasons

機能全体21%
充電16%
不良材料/部品14%
バッテリーの内蔵9%
サイズ全体6%
互換性-全体6%
組み立て/インストール6%
重い4%
コストパフォーマンス3%
強さ3%

Common questions

Is delta 3 plus profitable to sell on Amazon Japan?
The niche generates ¥41.6M/yr across 17 tracked products. 10 of 10 products launched in the last 360 days are still selling. 90-day search growth is -12.1%. Flapen's verdict: Skip it (47/100).
How competitive is the delta 3 plus niche?
1 brands and 3 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in delta 3 plus?
Top complaints mined from reviews: 充電, 重い, 耐久性. The return rate is 0.2%.
When does demand for delta 3 plus peak?
Demand peaks in Jul–Nov–Dec; the busiest month runs 2.6× the quietest.
What does it cost to enter the delta 3 plus niche?
Listings span ¥57054.90–¥185837.78; the average listing price is ¥99093.91 (sweet spot $15–$100). The average incumbent carries 105 reviews — the moat a new listing must climb.