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61

ph測定器

Launch it

A $20.0M/yr market growing +0.6% this quarter with returns at 0.6% — clears our launch bar.

Market size 100Growth 26Conversion 46Competition 62Returns 97Price range 0Avg price 0Brand share 55Review moat 73Quality gap 97

Market size

Incredible¥20.0M

¥20.0M/yr · 192K searches

Quality gap

Incredible3.8★

avg incumbent rating — lower means beatable quality

Returns

Incredible0.6%

return rate — above 5% kills the launch gate

Review moat

Good589.06

avg incumbent reviews — the moat a new listing must climb

Competition

Good48%

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

Brand share

Good72%

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

Conversion

Okay3.7%

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

Growth

Okay+0.6%

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

Avg price

Bad¥2798.40

avg listing price — sweet spot $15–$100

Price range

Bad¥381.72–¥12536.52

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

According to Flapen's Amazon Japan niche tracking, ph測定器 is a ¥20.0M/yr Amazon Japan market (192K searches/yr). The top 5 brands hold 72% of demand. Verdict: Launch it — 61/100.

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

ph測定器 market data

Units sold / yr
6K–8K
avg 100–250/product
Revenue / yr
¥16.8M–¥22.4M
units × avg price
Conversion rate
3.7%
Avg BSR
#52
Page quality
0%
Prime
90%
Sponsored
84%
Out of stock
0.9%
Avg brand age
49 months
Avg seller age
167 days

Competition & brand share

The top 5 products take 48% of clicks — established leaders, but buyers still shop beyond them.

Brands

21 flat

Sellers

109

Top-5 brand share

72%

Top 20: 99%

Top-5 click share

48%

Top 20: 90%

Open market

22%

  • FieldNew21%
  • シンワ測定(Shinwa Sokutei)17%
  • MMK SCIENTIFIC12%
  • YAMRON11%
  • メーター名人10%
  • TAORAYO6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +0.6% search growth over the last 90 days.
5K3KSpike '25Black Friday '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.6×

Top ph測定器 search terms

  • ph測定器78K/yr
  • ペーハー測定器18K/yr
  • phメーター14K/yr
  • ph 測定17K/yr
  • ph計16K/yr
  • ph メーター11K/yr
  • ph測定器 水槽6K/yr
  • ph 測定器6K/yr
  • ph測定5K/yr
  • 水槽 ph測定器5K/yr
All search terms

Top ph測定器 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%¥800K8%¥1.6M12%¥2.4M16%¥3.2M101001K10K Reviews — right = deep review moat Market 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.

Trending

90-day click momentum

What buyers say about ph測定器

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

What buyers love

使用の容易さ43%

“お手軽”

コストパフォーマンス17%

“お手頃”

総合品質9%

“Good商品”

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5%

“使う前に良く説明書を読む事”

測定/読み取り精度4%

“シンワ測定器は安心”

水に強い2%

“水質調査結果判定素晴らしい”

地元製造2%

“安心の国内ブランド”

強さ1%

“電極は強そうです。”

バッテリーの内蔵1%

“簡易測定 電池要らず お手頃価格”

ディスプレイ全体1%

“ブルーのボディも視認性がよく、液晶もくっきり見やすいです。”

What buyers complain about

測定/読み取り精度23%

“測定精度が足りません。”

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10%

“説明書が英語でわからない”

コストパフォーマンス8%

“お値段以下”

使用の容易さ7%

“使えません”

機能全体6%

“全く機能しません。”

耐久性5%

“壊れる。”

総合品質5%

“安いから期待してませんでしたが。。。”

4%

“全部白いままでした”

ディスプレイ全体4%

“表示が0.00と表示される。”

バッテリーの内蔵3%

“乾電池が放電 「0」でした”

Top return reasons

機能全体26%
測定/読み取り精度22%
不良材料/部品9%
ディスプレイ全体7%
広告と実際の製品の違い7%
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5%
タッチ/ボタンコントロール4%
バッテリーの内蔵3%
傷に強い2%
総合品質2%

Common questions

Is ph測定器 profitable to sell on Amazon Japan?
The niche generates ¥20.0M/yr across 31 tracked products. 7 of 7 products launched in the last 360 days are still selling. 90-day search growth is +0.6%. Flapen's verdict: Launch it (61/100).
How competitive is the ph測定器 niche?
21 brands and 109 sellers compete. The top 5 products take 48% of clicks and top 5 brands hold 72% of demand.
What do buyers complain about in ph測定器?
Top complaints mined from reviews: 測定/読み取り精度, 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, コストパフォーマンス. The return rate is 0.6%.
When does demand for ph測定器 peak?
Demand is steady year-round — the busiest month runs 1.6× the quietest.
What does it cost to enter the ph測定器 niche?
Listings span ¥381.72–¥12536.52; the average listing price is ¥2798.40 (sweet spot $15–$100). The average incumbent carries 589 reviews — the moat a new listing must climb.