---
title: "Reviews — スパナ 13mm - Flapen"
canonical_url: "https://flapen.com/research/jp/diy/13mm/reviews"
last_updated: "2026-08-08T09:33:25.566Z"
locale: en
meta:
  description: "Niche score 58/100 · ¥1.5M/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 58/100 · ¥1.5M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Reviews — スパナ 13mm - Flapen"
---

# **スパナ 13mm**

**Worth a look**

Shows low returns (0.5%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 86Growth 14Conversion 97Competition 56Returns 98Price range 0Avg price 0Brand share 40Review moat 74Quality gap 77

**Returns**

**Incredible****0.5%**

return rate — above 5% kills the launch gate

**Conversion**

**Incredible****15.9%**

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

**Market size**

**Great****¥1.5M**

¥1.5M/yr · 14K searches

**Quality gap**

**Great****4.3★**

avg incumbent rating — lower means beatable quality

**Review moat**

**Good****533.48**

avg incumbent reviews — the moat a new listing must climb

**Competition**

**Good****52%**

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

**Brand share**

**Okay****81%**

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

**Growth**

**Bad****-21.8%**

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

**Avg price**

**Bad****¥651.88**

avg listing price — sweet spot $15–$100

**Price range**

**Bad****¥349.41–¥1433.76**

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