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kukiire

Skip it

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

Market size 77Growth 36Conversion 52Competition 3Returns 97Price range 0Avg price 0Brand share 0Review moat 44Quality gap 73

Returns

Incredible0.7%

return rate — above 5% kills the launch gate

Market size

Great¥948K

¥948K/yr · 5K searches

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Conversion

Good4.3%

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

Review moat

Okay2,068.43

avg incumbent reviews — the moat a new listing must climb

Growth

Okay+8.6%

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

Competition

Bad96%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Avg price

Bad¥4532.13

avg listing price — sweet spot $15–$100

Price range

Bad¥2000.48–¥10599.86

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

According to Flapen's Amazon Japan niche tracking, kukiire is a ¥948K/yr Amazon Japan market (5K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 42/100.

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

kukiire market data

Units sold / yr
100–250
avg 0–100/product
Revenue / yr
¥453K–¥1.1M
units × avg price
Conversion rate
4.3%
Avg BSR
#6
Page quality
0%
Prime
100%
Sponsored
100%
Out of stock
4.2%
Avg brand age
32 months
Avg seller age
204 days

Competition & brand share

The top 5 products capture 96% of clicks — a locked-up shelf that new listings rarely crack.

Brands

6 flat

Sellers

33

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

96%

Top 20: 100%

Open market

0%

  • PANP36%
  • Leacco21%
  • AAL21%
  • Philoent7%
  • Kaedear7%
  • BTIHCEUOT7%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +8.6% search growth over the last 90 days.
450350Spike '24Holiday '24Spike '25Prime Day '25Black Friday '25Spike '26Prime Day '26SepDecMarJunAugNovMarMay

Peak months: Sep, Oct · busiest ÷ quietest = 2.4×

Top kukiire search terms

  • kukiire1K/yr
  • kuukiire1K/yr
  • kukiire スマート空気入れ955/yr
  • スマート空気入れ1K/yr
  • スマート空気入れ kukiire188/yr
  • スマート空気入れ 日本製69/yr
  • スマート空気いれ11/yr
All search terms

Top kukiire 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%¥95K20%¥190K30%¥284K40%¥379K1001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 7 tracked products in this niche — three views at once, no toggling.

What buyers say about kukiire

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

What buyers love

使用の容易さ32%

“ストレスフリー”

コストパフォーマンス10%

“お手頃”

コンパクトさ8%

“コンパクトでコードレス”

圧力7%

“空気圧の単位の変更など問題なし。”

総合品質4%

“good gear”

持ち運びやすさ4%

“小型・パワー、コスパに優れます。”

充電3%

“久々の充電タイプ。”

騒音レベル2%

“音はそこそこ”

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2%

“説明書もわかりやすくてシンプル”

バッテリーの内蔵2%

“8000mAh容量あるのですが一度充電を満タンにすれば結構長く使えると思います。”

What buyers complain about

騒音レベル25%

“会話できないレベルでうるさいわけではない”

耐久性6%

“壊れた。”

サイズ全体5%

“小さい”

圧力4%

“空気圧がどのタイヤを測っても255kpa”

充電3%

“万充電にならない”

バッテリーの内蔵3%

“バッテリーが死んでるのが届く”

漏れ防止3%

“空気が漏れる”

機能全体3%

“全く動作しません”

総合品質2%

“ゴミ”

測定/読み取り精度2%

“圧力の単位がスタンドのKg表示に慣れていたのでこれはちょっと計算しないといけません。”

Top return reasons

機能全体17%
充電14%
不良材料/部品13%
漏れ防止7%
騒音レベル7%
圧力6%
使用の容易さ3%
広告と実際の製品の違い3%
サイズ全体3%
追加アイテム/添付ファイル3%

Common questions

Is kukiire profitable to sell on Amazon Japan?
The niche generates ¥948K/yr across 7 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +8.6%. Flapen's verdict: Skip it (42/100).
How competitive is the kukiire niche?
6 brands and 33 sellers compete. The top 5 products take 96% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in kukiire?
Top complaints mined from reviews: 騒音レベル, 耐久性, サイズ全体. The return rate is 0.7%.
When does demand for kukiire peak?
Demand peaks in Sep–Oct; the busiest month runs 2.4× the quietest.
What does it cost to enter the kukiire niche?
Listings span ¥2000.48–¥10599.86; the average listing price is ¥4532.13 (sweet spot $15–$100). The average incumbent carries 2,068 reviews — the moat a new listing must climb.