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47

カルスnc-r

Skip it

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

Market size 100Growth 21Conversion 55Competition 8Returns 99Price range 0Avg price 0Brand share 0Review moat 74Quality gap 81

Market size

Incredible¥58.6M

¥58.6M/yr · 358K searches

Returns

Incredible0.3%

return rate — above 5% kills the launch gate

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Review moat

Good522.38

avg incumbent reviews — the moat a new listing must climb

Conversion

Good4.6%

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

Growth

Bad-7.9%

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

Competition

Bad90%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Avg price

Bad¥3582.06

avg listing price — sweet spot $15–$100

Price range

Bad¥1506.01–¥6880.52

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

According to Flapen's Amazon Japan niche tracking, カルスnc-r is a ¥58.6M/yr Amazon Japan market (358K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Apr–May. Verdict: Skip it — 47/100.

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

カルスnc-r market data

Units sold / yr
20K–25K
avg 2,000–2,500/product
Revenue / yr
¥71.6M–¥89.6M
units × avg price
Conversion rate
4.6%
Avg BSR
#99
Page quality
0%
Prime
63%
Sponsored
38%
Out of stock
10.0%
Avg brand age
61 months
Avg seller age
188 days

Competition & brand share

The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.

Brands

5 falling

Sellers

17

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

90%

Top 20: 100%

Open market

0%

  • アイアグリ(I Agri)52%
  • 超SUPERカルスNC-R20%
  • アイアグリ19%
  • ノーブランド品7%
  • chabishop08083%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -7.9% search growth over the last 90 days.
13K8KSpike '24Spike '25Black Friday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Apr, May · busiest ÷ quietest = 2.5×

Top カルスnc-r search terms

  • カルスnc-r172K/yr
  • カルス66K/yr
  • カルス ncr29K/yr
  • カルスncr24K/yr
  • カルス nc r8K/yr
  • カルスnc-r 1kg 最安値11K/yr
  • カルスnc8K/yr
  • カルスncr 10kg3K/yr
  • カルス nc-r 1kg8K/yr
  • カルス nc-r 10kg5K/yr
All search terms

Top カルスnc-r 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%¥8.8M30%¥17.6M45%¥26.4M60%¥35.2M1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 8 tracked products in this niche — three views at once, no toggling.

What buyers say about カルスnc-r

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

What buyers love

使用の容易さ25%

“手軽に使える”

総合品質12%

“良い品です”

環境に優しい11%

“微生物資材は良いと思います。”

効率8%

“綺麗に残渣処理出来ますが、籾殻や硫安など説明書き通りの配合での使用をお勧めします。”

コストパフォーマンス8%

“近くのホームセンターより手頃だった”

広告と実際の製品の違い3%

“商品説明どおり”

柔らかい感触3%

“土が柔らかくなり”

リサイクル・再利用3%

“残渣をすき込んで分解リサイクル効果出てます。”

匂い3%

“嫌な匂いも全くせず。”

湿った/乾燥した2%

“さらさらで水分の少ない土のままだったので新しい土と混ぜて使っています。”

What buyers complain about

コストパフォーマンス38%

“もう少し値段が下がるといいなぁ。”

機能全体7%

“効果は、まったくわからなかった。”

使用の容易さ6%

“取り扱いが少し大変(..)”

破れ抵抗性4%

“破れにくい袋にしていただきたいです。”

強さ4%

“よく見ると、カルスの袋が弱いように思います。”

測定/読み取り精度4%

“割合正しいか、わからなかったです”

4%

“芝の色が濃くなりました”

匂い4%

“匂いはカビ臭い匂いを発しますが、野菜の腐った臭いはありません。”

サイズ全体4%

“硫安の粒が少し大きいかったです。”

リサイクル・再利用2%

“なかなか捨てにくいベランダ土のリサイクルに。残滓なども入れられて1週間おけばOK。”

Top return reasons

漏れ防止57%
保管容量14%
サイズ全体14%
総合品質14%

Common questions

Is カルスnc-r profitable to sell on Amazon Japan?
The niche generates ¥58.6M/yr across 8 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -7.9%. Flapen's verdict: Skip it (47/100).
How competitive is the カルスnc-r niche?
5 brands and 17 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in カルスnc-r?
Top complaints mined from reviews: コストパフォーマンス, 機能全体, 使用の容易さ. The return rate is 0.3%.
When does demand for カルスnc-r peak?
Demand peaks in Apr–May; the busiest month runs 2.5× the quietest.
What does it cost to enter the カルスnc-r niche?
Listings span ¥1506.01–¥6880.52; the average listing price is ¥3582.06 (sweet spot $15–$100). The average incumbent carries 522 reviews — the moat a new listing must climb.