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62

化成肥料 8-8-8 20kg

Worth a look

Shows low returns (0.2%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 95Growth 22Conversion 80Competition 57Returns 99Price range 0Avg price 0Brand share 49Review moat 93Quality gap 84

Returns

Incredible0.2%

return rate — above 5% kills the launch gate

Market size

Incredible¥2.1M

¥2.1M/yr · 13K searches

Review moat

Great141.42

avg incumbent reviews — the moat a new listing must climb

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Conversion

Great8.1%

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

Competition

Good51%

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

Brand share

Okay76%

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

Growth

Bad-6.8%

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

Avg price

Bad¥1933.00

avg listing price — sweet spot $15–$100

Price range

Bad¥533.55–¥4369.64

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

According to Flapen's Amazon Japan niche tracking, 化成肥料 8-8-8 20kg is a ¥2.1M/yr Amazon Japan market (13K searches/yr). The top 5 brands hold 76% of demand. Demand peaks in Mar–Apr–May. Verdict: Worth a look — 62/100.

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

化成肥料 8-8-8 20kg market data

Units sold / yr
500–750
avg 0–100/product
Revenue / yr
¥967K–¥1.4M
units × avg price
Conversion rate
8.1%
Avg BSR
#183
Page quality
0%
Prime
69%
Sponsored
35%
Out of stock
2.9%
Avg brand age
94 months
Avg seller age
212 days

Competition & brand share

The top 5 products take 51% of clicks — established leaders, but buyers still shop beyond them.

Brands

14 rising

Sellers

29

Top-5 brand share

76%

Top 20: 100%

Top-5 click share

51%

Top 20: 94%

Open market

19%

  • サンアンドホープ26%
  • セントラルグリーン(Central Green)24%
  • 朝日アグリア14%
  • 大宮グリーンサービス6%
  • 花ごころ6%
  • 三菱商事アグリサービス(MAC)5%

Demand & seasonality

Weekly Amazon search volume, last 64 weeks — -6.8% search growth over the last 90 days.
500300Spike '25Prime Day '25Black Friday '25Spike '26JunJulAugSepOctNovDecJanFebMarAprMayJunJul

Peak months: Mar, Apr, May · busiest ÷ quietest = 3.0×

Top 化成肥料 8-8-8 20kg search terms

  • 化成肥料 8-8-8 10kg4K/yr
  • 化成肥料 8-8-8 20kg6K/yr
  • 化成肥料 8-8-8 5kg3K/yr
All search terms

Top 化成肥料 8-8-8 20kg 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%4%¥82K8%¥164K12%¥246K16%¥328K1101001K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)2 products missing review or click data not plotted

All 24 tracked products in this niche — three views at once, no toggling.

What buyers say about 化成肥料 8-8-8 20kg

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

What buyers love

使用の容易さ46%

“使いやすく土に溶けやすい”

コストパフォーマンス15%

“コスパいいです”

総合品質11%

“良い商品”

匂い5%

“匂いは控えめ基本的に使い易く庭の花壇ぐらいにはちょうど良い”

広告と実際の製品の違い3%

“情報通りで良かったです”

重い3%

“すぐ来て、重いので助かる”

保管容量3%

“大容量で助かりました。”

持ち運びやすさ3%

“重宝しています。”

サイズ全体3%

“量が凄くていい”

What buyers complain about

コストパフォーマンス29%

“肥料の値段が高くなってるので、自分はこれでじゅうぶんです。”

匂い19%

“匂いは少なめ”

総合品質17%

“安い”

サイズ全体8%

“思っていたより大粒だった”

Top return reasons

サイズ全体67%
漏れ防止22%
清掃の容易さ11%

Common questions

Is 化成肥料 8-8-8 20kg profitable to sell on Amazon Japan?
The niche generates ¥2.1M/yr across 26 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -6.8%. Flapen's verdict: Worth a look (62/100).
How competitive is the 化成肥料 8-8-8 20kg niche?
14 brands and 29 sellers compete. The top 5 products take 51% of clicks and top 5 brands hold 76% of demand.
What do buyers complain about in 化成肥料 8-8-8 20kg?
Top complaints mined from reviews: コストパフォーマンス, 匂い, 総合品質. The return rate is 0.2%.
When does demand for 化成肥料 8-8-8 20kg peak?
Demand peaks in Mar–Apr–May; the busiest month runs 3.0× the quietest.
What does it cost to enter the 化成肥料 8-8-8 20kg niche?
Listings span ¥533.55–¥4369.64; the average listing price is ¥1933.00 (sweet spot $15–$100). The average incumbent carries 141 reviews — the moat a new listing must climb.