Skip to content
59

ブラックライト 365nm

Launch it

A $6.5M/yr market growing +38.6% this quarter with returns at 0.4% — clears our launch bar.

Market size 99Growth 62Conversion 48Competition 53Returns 98Price range 0Avg price 0Brand share 32Review moat 30Quality gap 82

Market size

Incredible¥6.5M

¥6.5M/yr · 84K searches

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Growth

Good+38.6%

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

Competition

Good53%

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

Conversion

Okay3.8%

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

Brand share

Okay86%

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

Review moat

Okay3,517.88

avg incumbent reviews — the moat a new listing must climb

Avg price

Bad¥2029.81

avg listing price — sweet spot $15–$100

Price range

Bad¥690.02–¥8248.84

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

According to Flapen's Amazon Japan niche tracking, ブラックライト 365nm is a ¥6.5M/yr Amazon Japan market (84K searches/yr). The top 5 brands hold 86% of demand. Demand peaks in Jul. Verdict: Launch it — 59/100.

Data updated Jul 30, 2026 · scored weekly · How we score niches

ブラックライト 365nm market data

Units sold / yr
3K–3K
avg 0–100/product
Revenue / yr
¥5.1M–¥6.1M
units × avg price
Conversion rate
3.8%
Avg BSR
#68
Page quality
0%
Prime
97%
Sponsored
97%
Out of stock
0.6%
Avg brand age
38 months
Avg seller age
181 days

Competition & brand share

The top 5 products take 53% of clicks — established leaders, but buyers still shop beyond them.

Brands

16 rising

Sellers

42

Top-5 brand share

86%

Top 20: 100%

Top-5 click share

53%

Top 20: 86%

Open market

12%

  • DARKBEAM53%
  • ALONEFIRE17%
  • Lepro9%
  • RACAYZEE4%
  • BESTSUN2%
  • SUNPIE2%
  • Open — no brand owns it (10 brands, 12%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +38.6% search growth over the last 90 days.
3K2KSpike '24Holiday '24Spike '25Prime Day '25Black Friday '25Spike '26Prime Day '26SepDecMarJunAugNovMarMay

Peak months: Jul · busiest ÷ quietest = 1.6×

Top ブラックライト 365nm search terms

  • ブラックライト 365nm37K/yr
  • uvライト 365nm13K/yr
  • ブラックライト 充電式10K/yr
  • 365nm ブラックライト8K/yr
  • 365nm5K/yr
  • 鉱物 ライト6K/yr
  • uvライト 充電式4K/yr
All search terms

Top ブラックライト 365nm 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%4%¥259K8%¥517K12%¥776K16%¥1.0M101001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

What buyers say about ブラックライト 365nm

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

What buyers love

明るさ/輝き/光沢18%

“めちゃくちゃ蓄光します”

使用の容易さ14%

“実用メリット”

充電10%

“充電式でスリムなボディは使いやすい”

総合品質7%

“アルミボディの質感も良く、ガジェットとして手元に置いておくだけで頼もしい優秀なクオリティ。”

コストパフォーマンス6%

“お手頃価格”

サイズ全体4%

“良いサイズ”

強さ3%

“強力です”

持ち運びやすさ3%

“小型でもしっかり反応”

軽い3%

“単4形3本タイプのUVライトより小型軽量です。”

コンパクトさ3%

“本体はコンパクトで軽く、収納場所を取らないところも良いです。”

What buyers complain about

明るさ/輝き/光沢17%

“光量にばらつき”

充電10%

“全く充電出来ません。”

サイズ全体7%

“到底収まりません。”

総合品質5%

“ゴミ”

耐久性4%

“3か月ほど使用しなかったら、なかなかONしなかった。”

使用の容易さ4%

“ベタな使い方ですが腹痛はごめんこうむる。”

広告と実際の製品の違い4%

“虚偽広告やめてくれ”

バッテリーの内蔵3%

“バッテリーが弱すぎる”

強さ3%

“壊れやすい”

接着性/粘着性3%

“ベタベタ感が無くなるには丸一日かかりました。”

Top return reasons

充電34%
明るさ/輝き/光沢14%
不良材料/部品11%
機能全体9%
広告と実際の製品の違い6%
加熱5%
タッチ/ボタンコントロール4%
傷に強い2%
バッテリーの内蔵2%
耐久性2%

Common questions

Is ブラックライト 365nm profitable to sell on Amazon Japan?
The niche generates ¥6.5M/yr across 34 tracked products. 8 of 8 products launched in the last 360 days are still selling. 90-day search growth is +38.6%. Flapen's verdict: Launch it (59/100).
How competitive is the ブラックライト 365nm niche?
16 brands and 42 sellers compete. The top 5 products take 53% of clicks and top 5 brands hold 86% of demand.
What do buyers complain about in ブラックライト 365nm?
Top complaints mined from reviews: 明るさ/輝き/光沢, 充電, サイズ全体. The return rate is 0.4%.
When does demand for ブラックライト 365nm peak?
Demand peaks in Jul; the busiest month runs 1.6× the quietest.
What does it cost to enter the ブラックライト 365nm niche?
Listings span ¥690.02–¥8248.84; the average listing price is ¥2029.81 (sweet spot $15–$100). The average incumbent carries 3,518 reviews — the moat a new listing must climb.