---
title: "Em菌 — ¥30.1M/yr Amazon JP Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/jp/diy/em"
last_updated: "2026-08-06T04:17:05.630Z"
locale: en
meta:
description: "Niche score 57/100 · ¥30.1M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 57/100 · ¥30.1M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Em菌 — ¥30.1M/yr Amazon JP Niche (2026) - Flapen"
---
# **em菌**
**Worth a look**
Shows a $30.1M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 100Growth 16Conversion 68Competition 56Returns 99Price range 0Avg price 0Brand share 21Review moat 91Quality gap 75
**Market size**
**Incredible****¥30.1M**
¥30.1M/yr · 131K searches
**Returns**
**Incredible****0.2%**
return rate — above 5% kills the launch gate
**Review moat**
**Great****181.5**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Good****6.2%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Good****51%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Bad****92%**
top-5 brand share — brand-locked demand
**Growth**
**Bad****-17.1%**
90-day search growth — must beat 0% to launch
**Avg price**
**Bad****¥3728.14**
avg listing price — sweet spot $15–$100
**Price range**
**Bad****¥483.40–¥9629.89**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Signals**[** High Price**](https://flapen.com/research/niches?market=jp&signal=high_price "Avg price > $50")
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 ~~](https://flapen.com/research/methodology)
## **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.
5K4KSpike '24Holiday '24Spike '25Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Feb, Mar, Apr · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/jp/diy/em/trend)
## **Top em菌 search terms**
- **em菌**68K/yr-23.3%4.7% conv. - **em生活**10K/yr-8.4%2.9% conv. - **em活性液**4K/yr+6.0%3.4% conv. - **em 菌**4K/yr-52.1%4.8% conv. [**All search terms **](https://flapen.com/research/jp/diy/em/search-terms)
## **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.
0%5%¥1.5M10%¥3.0M15%¥4.5M20%¥6.0M1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**EM生活 EM1 500ml**EM生活**¥1519.01**4.1★312 rev](https://www.amazon.co.jp/dp/B00EYDUA68) [2**EM生活(EMseikatsu) EM-W 500ml**EM生活**¥1480.78**4.3★819 rev](https://www.amazon.co.jp/dp/B000FQKGEE) [3**EM生活 EM-W 500ml - 2入**EM生活**¥2337.90**4.4★291 rev](https://www.amazon.co.jp/dp/B07YB5QCL2) [4**EM生活 EM・X GOLD 500ml**EM生活**¥4763.82**4.4★481 rev](https://www.amazon.co.jp/dp/B0012I0TB4) [5**EM生活 EM-W 500ml×2セット**EM生活**¥2391.26**4.3★131 rev](https://www.amazon.co.jp/dp/B0DZ5TRQ53)
**~~View all top sellers →~~**
### **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**¥9608.25**6 rev6mo ago](https://www.amazon.co.jp/dp/B0GHQB8L1N) [**EM生活 EM-W 500ml×2セット**EM生活**¥2391.26**131 rev1y ago](https://www.amazon.co.jp/dp/B0DZ5TRQ53) [**EM生活 EM1 500ml×2セット**EM生活**¥2380.14**40 rev1y ago](https://www.amazon.co.jp/dp/B0DZ5KW44R) [**EM・X GOLD 500ml×2本セット【EMW1本プレゼント付】**ノーブランド品**¥9629.89**27 rev3y ago](https://www.amazon.co.jp/dp/B0G6LSPZNR) [**【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**¥644.15**48 rev3y ago](https://www.amazon.co.jp/dp/B0C85HZQ3C)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**¥9608.25**5.0★**▲ 208%**](https://www.amazon.co.jp/dp/B0GHQB8L1N) [**ＥＭ研究所 環境浄化微生物資材 EMW（５００ｍｌ）× 3本セット**ＥＭ研究所**¥3356.90**4.6★**▲ 97%**](https://www.amazon.co.jp/dp/B013LEEI90) [**EM生活 EM3 1L**EM生活**¥2391.31**3.6★**▲ 68%**](https://www.amazon.co.jp/dp/B00ZU2FDO6) [**EM生活 EM2 1L**EM生活**¥2588.34**3.9★**▲ 64%**](https://www.amazon.co.jp/dp/B0089A51AM) [**EM生活 EM1 500ml**EM生活**¥1519.01**4.1★**▲ 54%**](https://www.amazon.co.jp/dp/B00EYDUA68)
**~~View all trending →~~**
## **What buyers say about em菌**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**総合品質**14%
*“良い商品です”*
**使用の容易さ**12%
*“便利です”*
**清掃の容易さ**12%
*“汚れ落ち抜群”*
**匂い**10%
*“全く匂わなくなりました。”*
**コストパフォーマンス**9%
*“値段”*
**環境に優しい**8%
*“身体にも環境にも優しく、汚れも取れます。”*
**耐久性**4%
*“長年使っています”*
**リサイクル・再利用**3%
*“何年も再利用しています。”*
**柔らかい感触**3%
*“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。”*
**ギフト用**3%
*“友達にもプレゼントしました^_^。”*
### **What buyers complain about **
**匂い**34%
*“臭いが少ない”*
**コストパフォーマンス**22%
*“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。”*
**使用の容易さ**8%
*“使いこなせない”*
**清掃の容易さ**4%
*“シンクが汚れる”*
**快適さ-全体**4%
*“少し不快な気持ちになりました。”*
**成分全体**4%
*“添加物が少ない方が良いと思い購入。”*
**湿った/乾燥した**4%
*“寝るときまでに乾くし、フカフカ。”*
**使用説明書/ユーザーマニュアル/トラブルシューティング**2%
*“異なる商品の説明書が同梱されていた。”*
**室内での使用に適している**2%
*“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 **
**広告と実際の製品の違い**50%
**匂い**50%
## **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.
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