---
title: "Trend — 換気扇 20cm - Flapen"
canonical_url: "https://flapen.com/research/jp/diy/20cm/trend"
last_updated: "2026-08-08T08:42:24.691Z"
locale: en
meta:
  description: "Niche score 57/100 · ¥5.3M/yr market · 32K searches/yr · ¥4727.76 avg price. Clears our launch bar. Data updated Jul 2026."
  "og:description": "Niche score 57/100 · ¥5.3M/yr market · 32K searches/yr · ¥4727.76 avg price. Clears our launch bar. Data updated Jul 2026."
  "og:title": "Trend — 換気扇 20cm - Flapen"
---

# **換気扇 20cm**

**Launch it**

A $5.3M/yr market growing +22.2% this quarter with returns at 0.6% — clears our launch bar.

Market size 98Growth 51Conversion 44Competition 40Returns 97Price range 0Avg price 0Brand share 19Review moat 94Quality gap 83

**Market size**

**Incredible****¥5.3M**

¥5.3M/yr · 32K searches

**Returns**

**Incredible****0.6%**

return rate — above 5% kills the launch gate

**Review moat**

**Great****116.38**

avg incumbent reviews — the moat a new listing must climb

**Quality gap**

**Great****4.2★**

avg incumbent rating — lower means beatable quality

**Growth**

**Good****+22.2%**

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

**Conversion**

**Okay****3.5%**

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

**Competition**

**Okay****61%**

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

**Brand share**

**Bad****92%**

top-5 brand share — brand-locked demand

**Avg price**

**Bad****¥4727.76**

avg listing price — sweet spot $15–$100

**Price range**

**Bad****¥2660.31–¥8673.27**

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

**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=jp&signal=low_review_barrier "Top brand's reviews < 500") [** High Price**](https://flapen.com/research/niches?market=jp&signal=high_price "Avg price > $50")

## Trend