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G1/2

Maybe

An estimated 0.7% of orders come back. But products sell for $663.15 on average, outside the sweet spot, so G1/2 is a Maybe.

Flapen Score
59
59 / 100
Top 39% of 4,191 DIY・工具・ガーデン niches · +2 vs the category median of 57
Market size
¥1.0M/yr25K searches / yr
90-day growth
+15.3%search demand this quarter
Competition
48%top-5 click share · 13 brands · 96 sellers

Flapen Score

G1/2 against its category

The dotted line is the DIY・工具・ガーデン average. Past it, G1/2 is stronger. Inside it, weaker.

59Maybe
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The G1/2 market on Amazon at a glance

Shoppers on Amazon Japan searched for G1/2 25K times last year and spent an estimated ¥1.0M. The top 5 brands take 91% of clicks. Demand peaks in Jul. Flapen scores it 59 out of 100, a Maybe.

01 · Demand

An estimated 6.2% of those searches ended in a purchase.

Shoppers searched for this 25K times in the last 12 months. That counts every search on Amazon Japan for this niche's terms. An estimated 6.2% of those searches ended in a purchase. Searches in the last 90 days moved +15.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated ¥1.0M a year.

Searches, last 12 months
25K
Growth, 90 days vs prior 90
+15.3%
Conversion, latest week
6.2%
Market size, estimated
¥1.0Ma year
Peak month
July1.8× the quietest month
Top search term
g1/210K searches a year

02 · Price

A sale here is worth ¥663.15.

Listings sell for ¥663.15 on average, from ¥280.22 to ¥1802.97. Amazon reports units sold in ranges. This niche sold 1K to 1K a year. The average listing sells 0 to 100 of them. At ¥663.15 that is ¥0 to ¥66K a year per listing.

Average price
¥663.15above the $15 to $100 sweet spot
Price range
¥280.22–¥1802.97
Amazon Japan median price
¥1942.07across 14,733 niches
Units sold a year
1K–1K
Units per listing a year
0–100
Revenue per listing a year
¥0–¥66K
Returns
0.7%of orders · Amazon Japan median 0.4%

03 · Entry bar

The bar here is low.

32% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 2.8% of listings are out of stock. The average listing ranks #83 within 農具・散水用品. It carries 178 reviews at 4.16 stars, so a new listing needs social proof before a better product.

Sponsored listings
32%
Prime listings
100%
Out of stock, average day
2.8%
Average rank
#83in 農具・散水用品
Average rating
4.16 starsAmazon Japan average 4.15 stars
Average reviews
178per listing
Listings tracked
34

04 · Newcomers

4 of last year's 7 launches cleared the first-year sales bar.

7 products launched here in the last 12 months. 4 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 46 months on average, so the names here are settling in.

Launched, last 12 months
7
Successful launches
4Amazon's first-year sales bar
Average brand age
46 months

Products

Top G1/2 products & what they sell for

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 30, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 48% of clicks. Leaders hold, but buyers still shop past them.

¥0¥41K¥82K¥123K¥164K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

13 rising

Sellers

96

Est. top-5 brand share

91%

Top 20: 100%

Est. top-5 click share

48%

Top 20: 88%

Open market

7%

  • タカギ(Takagi)35%
  • SANEI(サンエイ)34%
  • カクダイ(KAKUDAI)14%
  • ISTORA6%
  • Mythtrail3%
  • PATIKIL2%
  • Open — no brand owns it (7 brands, 7%)

Demand

G1/2 search demand

Weekly searches over the year, seasonality beneath. Pick a range.

600400Spike '25Prime Day '25Black Friday '25Spike '26JanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJunJul

Peak months: Jul · busiest ÷ quietest = 1.8×

Search terms

Top G1/2 search terms shoppers use

The exact words shoppers type, with estimated yearly volume, growth, and conversion.

  • g1/210K/yr
  • g1/2 ニップル5K/yr
  • g1/2 ホース ジョイント4K/yr
  • 蛇口 g1/23K/yr
  • g1/2 継手3K/yr

Reviews and returns

What reviews say buyers love and hate about G1/2

We read the reviews and the return reasons for every product selling here.

14%of positive reviews mention “漏れ防止”
26%of negative reviews mention “漏れ防止”
0.7%of orders come back
“水漏れ”
A buyer, on “漏れ防止”26% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

20 topics

NegativePositive

FAQ

Common G1/2 questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data