Skip to content
49

bl1815n

Skip it

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

Market size 95Growth 36Conversion 67Competition 10Returns 97Price range 0Avg price 0Brand share 0Review moat 71Quality gap 80

Returns

Incredible0.7%

return rate — above 5% kills the launch gate

Market size

Incredible¥2.6M

¥2.6M/yr · 5K searches

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Review moat

Good646.63

avg incumbent reviews — the moat a new listing must climb

Conversion

Good6.0%

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

Growth

Okay+8.5%

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

Competition

Bad88%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Avg price

Bad¥7805.20

avg listing price — sweet spot $15–$100

Price range

Bad¥2147.34–¥14066.46

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

According to Flapen's Amazon Japan niche tracking, bl1815n is a ¥2.6M/yr Amazon Japan market (5K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 49/100.

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

bl1815n market data

Units sold / yr
500–750
avg 0–100/product
Revenue / yr
¥3.9M–¥5.9M
units × avg price
Conversion rate
6.0%
Avg BSR
#303
Page quality
0%
Prime
75%
Sponsored
50%
Out of stock
3.3%
Avg brand age
27 months
Avg seller age
144 days

Competition & brand share

The top 5 products capture 88% of clicks — a locked-up shelf that new listings rarely crack.

Brands

5 rising

Sellers

213

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

88%

Top 20: 100%

Open market

0%

  • Makita(マキタ)62%
  • ノーブランド品19%
  • §VANKO9%
  • waitley7%
  • Baterieco3%
  • Open — no brand owns it (0%)

Demand

Weekly Amazon search volume, last 30 weeks — +8.5% search growth over the last 90 days.
150100Spike '26Prime Day '26Jan '26Feb '26Mar '26Apr '26May '26Jun '26

Top bl1815n 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%15%¥387K30%¥774K45%¥1.2M60%¥1.5M1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

All 8 tracked products in this niche — three views at once, no toggling.

What buyers say about bl1815n

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

What buyers love

総合品質13%

“信頼できるブランド”

バッテリーの内蔵11%

“軽量な3000mAhのマキタ互換バッテリー”

充電11%

“1回の充電で長時間使えます。”

コストパフォーマンス10%

“低価格”

耐久性7%

“耐久性とかはこれからわかってくると思います。”

軽い7%

“サイズも重さもバッチリですね”

使用の容易さ7%

“装着はスムーズで、純正と同じ感覚でカチッとはまります。”

互換性-全体5%

“問題なく使えています。 マキタの純正品のインパクトレンチにも互換品のインパクトドライバー等にも問題なく使えました。”

セキュリティ4%

“保管時にバッテリーを保護する防塵カバーが付属します。”

広告と実際の製品の違い4%

“想定通り”

What buyers complain about

充電29%

“充電できません”

バッテリーの内蔵13%

“3.0Ahの容量であれば放電時間は1時間程度かかるはずですが45分で終了、放電電流は2274mAhの結果となりました。”

コストパフォーマンス11%

“11,000円も請求し領収しながら全く信じられない。”

耐久性10%

“壊れた”

商品の状態6%

“新品なのにガッカリです。”

総合品質3%

“また、制御基板は防水コートされておらず、温度センサもセルにつけるものではないのでかなり質が悪いと感じます.”

互換性-全体2%

“互換性が全くありません。”

重い2%

“重い”

使用説明書/ユーザーマニュアル/トラブルシューティング1%

“説明書に書いてあったのか確認する気にもなれずあぁ残念”

清掃の容易さ1%

“とにかく汚い”

Top return reasons

充電38%
商品の状態14%
互換性-全体11%
サイズ全体10%
機能全体4%
バッテリーの内蔵4%
不良材料/部品3%
広告と実際の製品の違い2%
総合品質2%
タッチ/ボタンコントロール2%

Common questions

Is bl1815n profitable to sell on Amazon Japan?
The niche generates ¥2.6M/yr across 8 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +8.5%. Flapen's verdict: Skip it (49/100).
How competitive is the bl1815n niche?
5 brands and 213 sellers compete. The top 5 products take 88% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in bl1815n?
Top complaints mined from reviews: 充電, バッテリーの内蔵, コストパフォーマンス. The return rate is 0.7%.
What does it cost to enter the bl1815n niche?
Listings span ¥2147.34–¥14066.46; the average listing price is ¥7805.20 (sweet spot $15–$100). The average incumbent carries 647 reviews — the moat a new listing must climb.