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spta

Skip it

A small market ($0/yr) — this niche doesn't clear our bar today.

Market size 0Growth 24Conversion 0Competition 29Returns 95Price range 0Avg price 0Brand share 0Review moat 93Quality gap 92

Returns

Incredible1.0%

return rate — above 5% kills the launch gate

Review moat

Great148.65

avg incumbent reviews — the moat a new listing must climb

Quality gap

Great4.0★

avg incumbent rating — lower means beatable quality

Competition

Okay67%

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

Growth

Bad-1.1%

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

Market size

Bad¥0

¥0/yr · 45K searches

Conversion

Bad0.0%

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

Brand share

Bad100%

top-5 brand share — brand-locked demand

Avg price

Bad¥13559.47

avg listing price — sweet spot $15–$100

Price range

Bad¥3986.44–¥29338.01

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

According to Flapen's Amazon Japan niche tracking, spta is a ¥0/yr Amazon Japan market (45K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Oct–Nov–Dec. Verdict: Skip it — 31/100.

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

spta market data

Units sold / yr
100–250
avg 0–100/product
Revenue / yr
¥1.4M–¥3.4M
units × avg price
Conversion rate
0.0%
Avg BSR
#211
Page quality
0%
Prime
45%
Sponsored
95%
Out of stock
11.0%
Avg brand age
39 months
Avg seller age
170 days

Competition & brand share

The top 5 products take 67% of clicks — established leaders, but buyers still shop beyond them.

Brands

5 rising

Sellers

16

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

67%

Top 20: 100%

Open market

0%

  • SPTA75%
  • ZOTA19%
  • BATOCA4%
  • Mxmoonfree2%
  • ノーブランド品1%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -1.1% search growth over the last 90 days.
3K2KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Spike '26Prime Day '26SepDecMarJunAugNovMarMay

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

Top spta search terms

  • spta ポリッシャー22K/yr
  • spta15K/yr
  • spta ミニポリッシャー6K/yr
  • spta ポリッシャー コードレス2K/yr
All search terms

Top spta 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%5%¥010%¥015%¥020%¥01101001K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 20 tracked products in this niche — three views at once, no toggling.

What buyers say about spta

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

What buyers love

使用の容易さ24%

“普通に使えます”

コストパフォーマンス16%

“価格相応”

総合品質11%

“アタッチメントの交換が少し手間取る他は総じて良い商品だと思います。”

バッテリーの内蔵6%

“DIY程度であれば、有線でパワーが強く、バッテリーを考えなくてよいものがあっていますね。”

強さ4%

“流石にパワフル”

効率4%

“これは使える”

騒音レベル4%

“比較的静か”

明るさ/輝き/光沢3%

“隅々まで輝きを取り戻せますわ”

耐久性3%

“長い時間使えます。”

モーターのパワー3%

“DIY程度であれば、有線でパワーが強く、バッテリーを考えなくてよいものがあっていますね。”

What buyers complain about

騒音レベル14%

“止まる、うるさい、磨けない”

重い11%

“まず持った感じが重いです。1,9kg。わかっていたはずなのにね。”

使用の容易さ9%

“ただ頭を取り替える時にあまり強く締め込むと、外すのにめちゃくちゃ苦労します。”

耐久性6%

“休み休み行わないと壊れそうです。。。”

機能全体6%

“カーブヘッドが使えない...😫😖😣😩🥺😢”

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6%

“荒目、細目とか、ウールなのか、マイクロなのか、その辺りがの説明書なり商品自体に記載するなりして欲しい。”

強さ5%

“電池パックの爪が固くて脱着が出来ない”

広告と実際の製品の違い4%

“商品説明に嘘が無ければ、星3つです。”

総合品質3%

“ゴミ”

サイズ全体3%

“小さいのにパワーが有る。”

Top return reasons

不良材料/部品17%
騒音レベル11%
機能全体10%
使用の容易さ8%
耐久性6%
追加アイテム/添付ファイル6%
総合品質6%
匂い4%
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4%
メカニズムの問題4%

Common questions

Is spta profitable to sell on Amazon Japan?
The niche generates ¥0/yr across 20 tracked products. 6 of 7 products launched in the last 360 days are still selling. 90-day search growth is -1.1%. Flapen's verdict: Skip it (31/100).
How competitive is the spta niche?
5 brands and 16 sellers compete. The top 5 products take 67% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in spta?
Top complaints mined from reviews: 騒音レベル, 重い, 使用の容易さ. The return rate is 1.0%.
When does demand for spta peak?
Demand peaks in Oct–Nov–Dec; the busiest month runs 2.6× the quietest.
What does it cost to enter the spta niche?
Listings span ¥3986.44–¥29338.01; the average listing price is ¥13559.47 (sweet spot $15–$100). The average incumbent carries 149 reviews — the moat a new listing must climb.