muji pens
Skip itPrices mostly outside the sweet spot ($5.02–$14.14) — this niche doesn't clear our bar today.
Returns
Incredible0.4%return rate — above 5% kills the launch gate
Review moat
Good854.88avg incumbent reviews — the moat a new listing must climb
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Conversion
Okay2.8%search→purchase rate — share of searches ending in a sale
Competition
Okay64%top-5 click share — leaders hold, buyers still browse
Avg price
Okay£10.01avg listing price — sweet spot $15–$100
Growth
Bad-5.8%90-day search growth — must beat 0% to launch
Brand share
Bad93%top-5 brand share — brand-locked demand
Market size
Bad£68K£68K/yr · 246K searches
Price range
Bad£5.02–£14.14cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, muji pens is a £68K/yr Amazon United Kingdom market (246K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Apr–Sep. Verdict: Skip it — 36/100.
Data updated Jul 29, 2026 · scored weekly · How we score niches
muji pens market data
- Units sold / yr
- 8K–10K
- avg 250–500/product
- Revenue / yr
- £80K–£100K
- units × avg price
- Conversion rate
- 2.8%
- Avg BSR
- #303
- Page quality
- 0%
- Prime
- 94%
- Sponsored
- 81%
- Out of stock
- 2.6%
- Avg brand age
- 45 months
- Avg seller age
- 166 days
Competition & brand share
The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.Brands
7 rising
Sellers
63
Top-5 brand share
93%
Top 20: 100%
Top-5 click share
64%
Top 20: 100%
Open market
3%
- MUJI55%
- Muji12%
- ABEIER10%
- Hometric8%
- Shezi & co8%
- Generic5%
- Open — no brand owns it (1 brand, 3%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -5.8% search growth over the last 90 days.Peak months: Apr, Sep · busiest ÷ quietest = 4.3×
Top muji pens search terms
- muji pens104K/yr
- muji90K/yr
- muji pens 0.522K/yr
- muji pen17K/yr
- muji stationery5K/yr
- muji gel pens3K/yr
- muji5K/yr
Top muji pens 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.
All 16 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Muji Smooth Gel Ink Ballpoint Pen Knock Type 10-Pieces Set 0.5 mm Nib Size Black
MUJI£14.144.6★1,450 rev
MUJI 0.38mm Black Gel Ink Pen (Pack of 5)
Muji£10.664.6★781 rev
ABEIER Premium 12 Gel Ink Pens Fine Point Pens Ballpoint Pen 0.5mm for Japanese Office Stationery Supply Pack for XSG
ABEIER£7.724.6★2,345 rev
MUJI Gel Ink Ballpoint Pens 0.38mm Set of 9 Pack (5 Black 2 Blue 2 Red)
MUJI£13.404.5★1,278 rev
Muji Gel Ink Pen Black 0.5mm Pack of 3 (Japan Import)
MUJI£9.124.6★2,937 rev
Newest
by launch date
Surcotto Gel Ink Pens 12pcs 0.5mm Black Ultra-Fast Drying for Writing Drawing and Outlining - Suitable for Students and Office Workers
Surcotto£5.022,204 rev
Muji Gel Ink Ballpoint Pen Cap Type 10-Pieces Set 0.38 mm Nib Size Black
MUJI£13.75358 rev
MUJI Gel Ink Ballpoint Pens 0.38mm Set of 9 Pack (5 Black 2 Blue 2 Red)
MUJI£13.401,278 rev
ABEIER 0.35 mm Black Gel Pen Extra-Fine Ballpoint Pen for Office Stationery Supply (12 Pieces)
ABEIER£6.35536 rev
ABEIER Premium 12 Gel Ink Pens Fine Point Pens Ballpoint Pen 0.5mm for Japanese Office Stationery Supply Pack for XSG
ABEIER£7.722,345 rev
Trending
90-day click momentum
Shezi & co Muujiii Pens 0.38mm Black Gel Pen Pack of 10 | Smooth Writing Japanese Stationery | Fine Tip Ballpoint Pens for Students Office Handwriting Journaling & Notes (0.38mm Pack of 10)
Shezi & co£9.324.3★
Muujiii Pens 0.5mm Black Gel Pen Pack of 10 | Smooth Writing Japanese Stationery | Fine Tip Ballpoint Pens for Students Office Handwriting Journaling & Notes | Smudge-Free Ink
Shezi & co£10.783.8★
Muji Smooth Gel Ink Ballpoint Pen Knock Type 10-Pieces Set 0.5 mm Nib Size Black
MUJI£14.144.6★
MUJI Gel Ink Ballpoint Pens 0.38mm Set of 9 Pack (5 Black 2 Blue 2 Red)
MUJI£13.404.5★
Muji Pens 0.38mm Black Gel Pen Pack of 5 | Smooth Writing Japanese Stationery | Fine Tip Ballpoint Pens for Students Office Handwriting Journaling & Notes | Smudge-Free Ink
Hometric£8.034.4★
What buyers say about muji pens
What buyers praise and complain about, mined from review topics.What buyers love
“Beautiful writing”
“Brilliant Quality”
“Great pens”
“Really good vale at under £6 for 12”
“A pleasure to use”
“They dont smudge”
“The 0.38mm tip produces a very fine, precise line that is ideal for neat handwriting, detailed notes, and journaling”
“Well used and a good size”
“Smooth gel makes the difference”
“Awesome refillable pen design”
What buyers complain about
“one pen does not last long”
“A bit confused with all the good reviews”
“Writing is not smooth”
“Not very smooth”
“Bad Ink Flow”
“A few leaking in my bag”
“Zero value for money”
“However, these pens are quite scratchy, i tried the pens on a few different papers and it wasnt any better on any of them”
Top return reasons
Common questions
- Is muji pens profitable to sell on Amazon United Kingdom?
- The niche generates £68K/yr across 16 tracked products. 90-day search growth is -5.8%. Flapen's verdict: Skip it (36/100).
- How competitive is the muji pens niche?
- 7 brands and 63 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 93% of demand.
- What do buyers complain about in muji pens?
- Top complaints mined from reviews: Durability, Quality-Overall, Writing Experience. The return rate is 0.4%.
- When does demand for muji pens peak?
- Demand peaks in Apr–Sep; the busiest month runs 4.3× the quietest.
- What does it cost to enter the muji pens niche?
- Listings span £5.02–£14.14; the average listing price is £10.01 (sweet spot $15–$100). The average incumbent carries 855 reviews — the moat a new listing must climb.