em菌
Worth a lookShows a $30.1M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size
Incredible¥30.1M¥30.1M/yr · 131K searches
Returns
Incredible0.2%return rate — above 5% kills the launch gate
Review moat
Great181.5avg incumbent reviews — the moat a new listing must climb
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Conversion
Good6.2%search→purchase rate — share of searches ending in a sale
Competition
Good51%top-5 click share — leaders hold, buyers still browse
Brand share
Bad92%top-5 brand share — brand-locked demand
Growth
Bad-17.1%90-day search growth — must beat 0% to launch
Avg price
Bad¥3728.14avg listing price — sweet spot $15–$100
Price range
Bad¥483.40–¥9629.89cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon Japan niche tracking, em菌 is a ¥30.1M/yr Amazon Japan market (131K searches/yr). The top 5 brands hold 92% of demand. Demand peaks in Feb–Mar–Apr. Verdict: Worth a look — 57/100.
Data updated Jul 30, 2026 · scored weekly · How we score niches
em菌 market data
- Units sold / yr
- 6K–8K
- avg 100–250/product
- Revenue / yr
- ¥22.4M–¥29.8M
- units × avg price
- Conversion rate
- 6.2%
- Avg BSR
- #137
- Page quality
- 0%
- Prime
- 88%
- Sponsored
- 81%
- Out of stock
- 0.0%
- Avg brand age
- 91 months
- Avg seller age
- 170 days
Competition & brand share
The top 5 products take 51% of clicks — established leaders, but buyers still shop beyond them.Brands
10 flat
Sellers
53
Top-5 brand share
92%
Top 20: 100%
Top-5 click share
51%
Top 20: 92%
Open market
6%
- EM生活80%
- ＥＭ 農業資材 有用微生物4%
- 割主烹従 飛竜4%
- 株式会社 EM生活3%
- ノーブランド品2%
- ＥＭ研究所2%
- Open — no brand owns it (4 brands, 6%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -17.1% search growth over the last 90 days.Peak months: Feb, Mar, Apr · busiest ÷ quietest = 2.0×
Top em菌 search terms
- em菌68K/yr
- em生活10K/yr
- em活性液4K/yr
- em 菌4K/yr
Top em菌 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Newest
by launch date
EM生活 EM・X GOLD 500ml×2本セット【EMW1本プレゼント付】
割主烹従 飛竜¥9608.256 rev
EM生活 EM-W 500ml×2セット
EM生活¥2391.26131 rev
EM生活 EM1 500ml×2セット
EM生活¥2380.1440 rev
EM・X GOLD 500ml×2本セット【EMW1本プレゼント付】
ノーブランド品¥9629.8927 rev
【川端滝三郎商店】 生ゴミを肥料に EMぼかし500g×2P（生活モノ語り） 生ごみ発酵促進剤 生ゴミを肥料に EM菌 リサイクル 堆肥 有効利用 発酵 微生物 エシカル
川端滝三郎商店¥644.1548 rev
What buyers say about em菌
What buyers praise and complain about, mined from review topics.What buyers love
“良い商品です”
“便利です”
“汚れ落ち抜群”
“全く匂わなくなりました。”
“値段”
“身体にも環境にも優しく、汚れも取れます。”
“長年使っています”
“何年も再利用しています。”
“使い心地も良く、生クリームみたいに適度にやわらかくて、口に入れると溶ける感じが好きです。”
“友達にもプレゼントしました^_^。”
What buyers complain about
“臭いが少ない”
“ドラッグストアに売っている一般的なものより高価ですが体のことを考えてシャボン玉にしてます。”
“使いこなせない”
“シンクが汚れる”
“少し不快な気持ちになりました。”
“添加物が少ない方が良いと思い購入。”
“寝るときまでに乾くし、フカフカ。”
“異なる商品の説明書が同梱されていた。”
“室内や袋内で行う勇気はないけど屋外の庭なら私でもできそうです。”
Top return reasons
Common questions
- Is em菌 profitable to sell on Amazon Japan?
- The niche generates ¥30.1M/yr across 26 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -17.1%. Flapen's verdict: Worth a look (57/100).
- How competitive is the em菌 niche?
- 10 brands and 53 sellers compete. The top 5 products take 51% of clicks and top 5 brands hold 92% of demand.
- What do buyers complain about in em菌?
- Top complaints mined from reviews: 匂い, コストパフォーマンス, 使用の容易さ. The return rate is 0.2%.
- When does demand for em菌 peak?
- Demand peaks in Feb–Mar–Apr; the busiest month runs 2.0× the quietest.
- What does it cost to enter the em菌 niche?
- Listings span ¥483.40–¥9629.89; the average listing price is ¥3728.14 (sweet spot $15–$100). The average incumbent carries 182 reviews — the moat a new listing must climb.