---
title: "Reviews — 17mm ソケット - Flapen"
canonical_url: "https://flapen.com/research/jp/diy/17mm/reviews"
last_updated: "2026-08-08T09:33:10.083Z"
locale: en
meta:
  description: "Niche score 62/100 · ¥4.3M/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 62/100 · ¥4.3M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Reviews — 17mm ソケット - Flapen"
---

# **17mm ソケット**

**Worth a look**

Shows a $4.3M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 97Growth 16Conversion 69Competition 79Returns 97Price range 0Avg price 0Brand share 57Review moat 79Quality gap 72

**Market size**

**Incredible****¥4.3M**

¥4.3M/yr · 70K searches

**Returns**

**Incredible****0.5%**

return rate — above 5% kills the launch gate

**Competition**

**Great****36%**

top-5 click share — an open shelf

**Review moat**

**Great****422.29**

avg incumbent reviews — the moat a new listing must climb

**Quality gap**

**Good****4.3★**

avg incumbent rating — lower means beatable quality

**Conversion**

**Good****6.2%**

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

**Brand share**

**Good****71%**

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

**Growth**

**Bad****-18.6%**

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

**Avg price**

**Bad****¥981.05**

avg listing price — sweet spot $15–$100

**Price range**

**Bad****¥346.78–¥3598.10**

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")

## Reviews