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od-nestcom1bk

Skip it

Soft demand (-78.3% this quarter) — this niche doesn't clear our bar today.

Market size 81Growth 0Conversion 11Competition 19Returns 98Price range 0Avg price 0Brand share 0Review moat 93Quality gap 62

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Review moat

Great136.82

avg incumbent reviews — the moat a new listing must climb

Market size

Great¥1.2M

¥1.2M/yr · 30K searches

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Competition

Bad78%

top-5 click share — a locked-up shelf

Conversion

Bad0.9%

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

Growth

Bad-78.3%

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

Brand share

Bad100%

top-5 brand share — brand-locked demand

Avg price

Bad¥4620.49

avg listing price — sweet spot $15–$100

Price range

Bad¥715.48–¥14689.59

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

According to Flapen's Amazon Japan niche tracking, od-nestcom1bk is a ¥1.2M/yr Amazon Japan market (30K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 37/100.

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

od-nestcom1bk market data

Units sold / yr
100–250
avg 0–100/product
Revenue / yr
¥462K–¥1.2M
units × avg price
Conversion rate
0.9%
Avg BSR
#3,879
Page quality
0%
Prime
45%
Sponsored
100%
Out of stock
0.0%
Avg brand age
18 months
Avg seller age
222 days

Competition & brand share

The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.

Brands

5

Sellers

30

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

78%

Top 20: 100%

Open market

0%

  • エレコム(ELECOM)47%
  • MotoMoto17%
  • FILMEXT16%
  • VSTN13%
  • CARGO container7%
  • Open — no brand owns it (0%)

Demand

Weekly Amazon search volume, last 22 weeks — -78.3% search growth over the last 90 days.
700500Spike '26Prime Day '26Mar '26Mar '26Apr '26May '26May '26Jun '26Jul '26

Top od-nestcom1bk search terms

  • od-nestcom1bk8K/yr
  • nestout 一酸化炭素アラーム 3in14K/yr
  • 一酸化炭素チェッカー エレコム5K/yr
  • エレコム 一酸化炭素チェッカー6K/yr
  • ネストアウト 一酸化炭素チェッカー5K/yr
  • エレコム 一酸化炭素3K/yr
All search terms

Top od-nestcom1bk 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%¥179K30%¥359K45%¥538K60%¥717K1101001K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)3 products missing review or click data not plotted

All 11 tracked products in this niche — three views at once, no toggling.

What buyers say about od-nestcom1bk

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

What buyers love

使用の容易さ21%

“電池付属ですぐ使えます”

総合品質7%

“サイズやディスプレイが良く見やすく信用できる日本製”

コストパフォーマンス7%

“素晴らしいコストパフォーマンス”

バッテリーの内蔵7%

“電池付属ですぐ使えます”

デザイン全体7%

“小さくて軽く、スタイリッシュなデザインです。”

測定/読み取り精度6%

“エレコムのCO計は問題なく作動しています。”

サイズ全体6%

“ちょうどいいサイズ”

コンパクトさ6%

“コンパクトでおすすめです。”

セキュリティ4%

“安心して使える”

騒音レベル3%

“警報音はしっかり大きめで、いざという時に気づけそうな安心感があります。”

What buyers complain about

騒音レベル8%

“警報鳴りまくり”

充電5%

“充電式と迷ったのですが、電池で十分です。”

機能全体5%

“温度、湿度計として使おうにも五月蝿くて使えない。”

耐久性5%

“2ヶ月で故障”

コストパフォーマンス4%

“価格はやや高めで、静音時間が5分と長く感じる点が難点です。”

測定/読み取り精度4%

“ただ、実際に一酸化炭素が発生する状況を試すわけにはいかないので、精度については正直完全には分からない部分もあります。”

アラーム/タイマーの精度4%

“火の気の無い、風通しの良い屋外で、常に60PPM辺りを表示しており、1時間ほど放っておくと、何故かアラームが鳴り始める。”

バッテリーの内蔵4%

“裏を返せば電池がないとすぐに使えないのでやや不便です。”

軽い3%

“思ったより軽かったです”

材料の品質3%

“少しつくりは安っぽいですね。”

Top return reasons

測定/読み取り精度28%
アラーム/タイマーの精度19%
広告と実際の製品の違い11%
ディスプレイ全体8%
タッチ/ボタンコントロール7%
機能全体7%
漏れ防止6%
不良材料/部品6%
充電3%
3%

Common questions

Is od-nestcom1bk profitable to sell on Amazon Japan?
The niche generates ¥1.2M/yr across 11 tracked products. 4 of 9 products launched in the last 360 days are still selling. 90-day search growth is -78.3%. Flapen's verdict: Skip it (37/100).
How competitive is the od-nestcom1bk niche?
5 brands and 30 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in od-nestcom1bk?
Top complaints mined from reviews: 騒音レベル, 充電, 機能全体. The return rate is 0.4%.
What does it cost to enter the od-nestcom1bk niche?
Listings span ¥715.48–¥14689.59; the average listing price is ¥4620.49 (sweet spot $15–$100). The average incumbent carries 137 reviews — the moat a new listing must climb.