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7mm スパナ

Skip it

Pricing outside the sweet spot ($619.95 avg) — this niche doesn't clear our bar today.

Market size 55Growth 20Conversion 79Competition 24Returns 98Price range 0Avg price 0Brand share 33Review moat 70Quality gap 73

Returns

Incredible0.5%

return rate — above 5% kills the launch gate

Conversion

Great8.0%

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

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Review moat

Good691.6

avg incumbent reviews — the moat a new listing must climb

Market size

Good¥396K

¥396K/yr · 8K searches

Brand share

Okay85%

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

Competition

Bad71%

top-5 click share — a locked-up shelf

Growth

Bad-10.7%

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

Avg price

Bad¥619.95

avg listing price — sweet spot $15–$100

Price range

Bad¥281.08–¥1317.07

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

According to Flapen's Amazon Japan niche tracking, 7mm スパナ is a ¥396K/yr Amazon Japan market (8K searches/yr). The top 5 brands hold 85% of demand. Verdict: Skip it — 47/100.

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

7mm スパナ market data

Units sold / yr
750–1K
avg 0–100/product
Revenue / yr
¥465K–¥620K
units × avg price
Conversion rate
8.0%
Avg BSR
#11
Page quality
0%
Prime
100%
Sponsored
67%
Out of stock
0.0%
Avg brand age
83 months
Avg seller age
192 days

Competition & brand share

The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.

Brands

11 falling

Sellers

55

Top-5 brand share

85%

Top 20: 100%

Top-5 click share

71%

Top 20: 100%

Open market

11%

  • トネ(TONE)58%
  • Gulenvailo14%
  • トラスコ中山(TRUSCO)5%
  • DFsucces4%
  • SIGNET(シグネット)4%
  • FLZOSPER4%
  • Open — no brand owns it (5 brands, 11%)

Demand

Weekly Amazon search volume, last 17 weeks — -10.7% search growth over the last 90 days.
200150Spike '26Prime Day '26Apr '26Apr '26May '26May '26May '26Jun '26Jun '26Jul '26Jul '26

Top 7mm スパナ 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%¥40K20%¥79K30%¥119K40%¥158K1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 15 tracked products in this niche — three views at once, no toggling.

What buyers say about 7mm スパナ

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

What buyers love

総合品質24%

“品質はそこそこ、これで充分です。”

コストパフォーマンス20%

“お手頃価格”

使用の容易さ13%

“使い勝手が楽”

サイズ全体13%

“よく使うサイズと、自転車ペダル用のサイズが揃ってホルダーまで付いてるので大満足です。”

コンパクトさ6%

“コンパクトでイイ”

ロック機構4%

“こちらはラチェット機能も付いており、ほかのレンチの受けとしてもラチェットとしても使える。”

セキュリティ4%

“サイズに拘らずやっぱKTCの安心感は不滅です😊✌️”

保管容量3%

“価格的にお得の上、収納器具もついているのでよかった。”

持ち運びやすさ2%

“小型にセットしてあり便利”

メンテナンスと修理2%

“簡単なメンテナンスなどには重宝してます。”

What buyers complain about

サイズ全体33%

“10mmのスパナも11mmのスパナも10mmのナットより小さい”

互換性-全体11%
総合品質11%

“つまるところ良い工具はトータルで安くつく。”

材料の品質11%

“材質は弱い部分などはありますが、簡単なメンテナンスなどには重宝してます。”

耐久性6%

“耐久性はわかりませんが”

使用の容易さ4%

“剥がしたら汚いし、綺麗にするのが大変です。”

清掃の容易さ4%

“剥がしたら汚いし、綺麗にするのが大変です。”

Top return reasons

サイズ全体77%
厚み8%
機能全体8%
不良材料/部品8%

Common questions

Is 7mm スパナ profitable to sell on Amazon Japan?
The niche generates ¥396K/yr across 15 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -10.7%. Flapen's verdict: Skip it (47/100).
How competitive is the 7mm スパナ niche?
11 brands and 55 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 85% of demand.
What do buyers complain about in 7mm スパナ?
Top complaints mined from reviews: サイズ全体, 互換性-全体, 総合品質. The return rate is 0.5%.
What does it cost to enter the 7mm スパナ niche?
Listings span ¥281.08–¥1317.07; the average listing price is ¥619.95 (sweet spot $15–$100). The average incumbent carries 692 reviews — the moat a new listing must climb.