Is マグァンプk profitable to sell on Amazon Japan?

The niche generates ¥9.8M/yr across 6 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +14.9%. Flapen's verdict: Skip it (48/100).

How competitive is the マグァンプk niche?

2 brands and 49 sellers compete. The top 5 products take 97% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in マグァンプk?

Top complaints mined from reviews: サイズ全体, 握り心地, 匂い. The return rate is 0.2%.

When does demand for マグァンプk peak?

Demand peaks in Apr–May; the busiest month runs 3.4× the quietest.

What does it cost to enter the マグァンプk niche?

Listings span ¥431.14–¥1551.48; the average listing price is ¥800.83 (sweet spot $15–$100). The average incumbent carries 2,787 reviews — the moat a new listing must climb.

マグァンプk

Skip it

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

Market size

Incredible¥9.8M

¥9.8M/yr · 149K searches

Returns

Incredible0.2%

return rate — above 5% kills the launch gate

Conversion

Great8.2%

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Growth

Okay+14.9%

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

Review moat

Okay2,786.83

avg incumbent reviews — the moat a new listing must climb

Competition

Bad97%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Avg price

Bad¥800.83

avg listing price — sweet spot $15–$100

Price range

Bad¥431.14–¥1551.48

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

Signals High Price

According to Flapen's Amazon Japan niche tracking, マグァンプk is a ¥9.8M/yr Amazon Japan market (149K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Apr–May. Verdict: Skip it — 48/100.

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

マグァンプk market data

Units sold / yr: 13K–15K; avg 1,500–2,000/product
Revenue / yr: ¥10.0M–¥12.0M; units × avg price
Conversion rate: 8.2%
Avg BSR: #28
Page quality: 0%
Prime: 100%
Sponsored: 33%
Out of stock: 5.1%
Avg brand age: 65 months
Avg seller age: 178 days

Competition & brand share

The top 5 products capture 97% of clicks — a locked-up shelf that new listings rarely crack.

Brands

2 flat

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

97%

Top 20: 100%

Open market

ハイポネックスジャパン(HYPONeX JAPAN)96%
ハイポネックス4%
Open — no brand owns it (0%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +14.9% search growth over the last 90 days.

Peak months: Apr, May · busiest ÷ quietest = 3.4×

Open Trend

Top マグァンプk search terms

マグァンプk39K/yr +17.2%7.0% conv.
マグアンプ15K/yr +21.5%6.1% conv.
マグアンプk16K/yr +8.4%4.7% conv.
マグァンプ14K/yr +15.7%6.2% conv.
まぐあんぷk 中粒12K/yr +2.9%6.5% conv.
マグァンプk 中粒12K/yr +17.9%8.7% conv.
マグアンプk 中粒8K/yr +2.7%10.8% conv.
マグァンプk 小粒7K/yr +30.3%8.8% conv.
まがんぷk7K/yr +12.6%5.6% conv.
マガンプk4K/yr +13.8%7.6% conv.

All search terms

Top マグァンプk 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 6 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

ハイポネックスマグァンプK 中粒 1.1kg

ハイポネックスジャパン(HYPONeX JAPAN)¥954.654.4★4,083 rev

ハイポネックスマグァンプK 中粒 200g

ハイポネックスジャパン(HYPONeX JAPAN)¥431.144.4★4,083 rev

ハイポネックスマグァンプK 小粒 500g

ハイポネックスジャパン(HYPONeX JAPAN)¥647.934.4★4,083 rev

ハイポネックスマグァンプK 中粒 500g

ハイポネックスジャパン(HYPONeX JAPAN)¥650.694.4★4,083 rev

ハイポネックスジャパン(HYPONeX JAPAN) 追肥緩効性肥料マグァンプK 小粒 1.1kg 草花・野菜・芝生・観葉植物に

ハイポネックス¥1551.484.5★5 rev

Newest

by launch date

ハイポネックスジャパン(HYPONeX JAPAN) 追肥緩効性肥料マグァンプK 小粒 1.1kg 草花・野菜・芝生・観葉植物に

ハイポネックス¥1551.485 rev

6mo ago

ハイポネックスマグァンプK 中粒 200g

ハイポネックスジャパン(HYPONeX JAPAN)¥431.144,083 rev

3y ago

ハイポネックスマグァンプK 小粒 500g

ハイポネックスジャパン(HYPONeX JAPAN)¥647.934,083 rev

3y ago

ハイポネックスマグァンプK 中粒 500g

ハイポネックスジャパン(HYPONeX JAPAN)¥650.694,083 rev

3y ago

ハイポネックスマグァンプK 中粒 1.1kg

ハイポネックスジャパン(HYPONeX JAPAN)¥954.654,083 rev

3y ago

What buyers say about マグァンプk

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

What buyers love

使用の容易さ46%

“小粒が手軽で良いので買えて良かったです。”

コストパフォーマンス13%

“お買い得でした”

総合品質8%

“良い商品です。”

耐久性8%

“持続力: 中粒は約1年効くので、植え替え頻度が少ない観葉植物や多肉植物に最適です。”

機能全体3%

“即効効果ありました。”

正しい内容3%

“程よい量”

広告と実際の製品の違い3%

“問題ありません”

測定/読み取り精度3%

“いつもハッキリと効果が確認できます。”

効率3%

“土の入れ替えには必ず使用しています。このおかげかどうかわかりませんがよく実ります”

清掃の容易さ2%

“手入れが楽になる”

What buyers complain about

サイズ全体20%

“大きくなぁれ。。。”

握り心地20%

“手袋しないと手が荒れるので注意”

匂い20%

“確かにニオイはないし”

コストパフォーマンス10%

“参考価格、高くし過ぎ”

硬い感覚10%

“難しいね”

色10%

“花の色の濃さがまばらになりました”

Top return reasons

漏れ防止40%

耐久性20%

サイズ全体20%

不良材料/部品20%

Common questions

Is マグァンプk profitable to sell on Amazon Japan?: The niche generates ¥9.8M/yr across 6 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +14.9%. Flapen's verdict: Skip it (48/100).
How competitive is the マグァンプk niche?: 2 brands and 49 sellers compete. The top 5 products take 97% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in マグァンプk?: Top complaints mined from reviews: サイズ全体, 握り心地, 匂い. The return rate is 0.2%.
When does demand for マグァンプk peak?: Demand peaks in Apr–May; the busiest month runs 3.4× the quietest.
What does it cost to enter the マグァンプk niche?: Listings span ¥431.14–¥1551.48; the average listing price is ¥800.83 (sweet spot $15–$100). The average incumbent carries 2,787 reviews — the moat a new listing must climb.

マグァンプk

マグァンプk market data

Competition & brand share

Demand & seasonality

Top マグァンプk search terms

Top マグァンプk products on Amazon

Top sellers

Newest

Trending

What buyers say about マグァンプk

What buyers love

What buyers complain about

Top return reasons

Common questions

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