Muji Pen Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Muji Pen sales on Amazon US totaled 171,600 units in July 2026 (▲ 11.0% vs. the prior month), generating an estimated $1,803,306 in revenue across the 50 top-ranked ASINs for this search term. Demand is heavily concentrated at the top of the ranking — the ten best performers capture 70.5% of unit volume and 68.4% of revenue, while a typical listing is priced at $10.54. The keyword itself pulled 46,882 Amazon queries over the same period (▲ 34.8% MoM).
Zooming out to the 12-month window ending July 2026, the muji pen Top 50 moved 2,001,350 units and $20,213,018 in cumulative sales — an average of 166,779 units and $1,684,418 per month. Monthly throughput topped out at 267,650 units in August 2025 and dipped to 102,850 in May 2026, leaving the latest reading 35.9% lower than August 2025.
Muji Pen Sales Trend (Trailing 12 Months)
Based on the top 50 ASINs by monthly sales for this keyword
2025/08
2025/09
2025/10
2025/11
2025/12
2026/01
2026/02
2026/03
2026/04
2026/05
2026/06
2026/07
Monthly Sales 2026/07
171.6K
▲ 11.0% MoM
Monthly Revenue 2026/07
$1.8M
▲ 19.1% MoM
Top 10 Market Share 2026/07
70.5%
Muji Pen Market Share & Sales Concentration on Amazon US — July 2026
The most-sold muji pen listing on Amazon US in July 2026 is ASIN B082PN4X5J (Brand: Sharpie), which sold 50,000 units at $9.99 apiece — equal to 29.1% of every unit tracked in this report and 2.5× the volume of the No. 2 listing.
The Top 10 ASINs account for 121,000 units and $1,233,790 in July 2026 — 70.5% of unit volume and 68.4% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Muji Pen' on Amazon
July 2026
Is 70.5% Top 10 share highly concentrated?
Ask AI to evaluate competition, market structure, and entry opportunities using ’s tracked Amazon sales, ranking, and keyword data.
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Top 5 Volume Share breakdown
B082PN4X5J
Sharpie Gel Gel Pens, Black Barrel, Medium Point (0.7mm), Black Gel Ink, 12 Count - Home, Office, School, Journaling, Writing, Note-Taking, Teacher Supplies
50K
▲ 25.0%vs. prior month
$599.5K
latest month
12-month trend
B0C9W8DD9S
Ddaowanx Gel Pens,6 Pcs 0.5mm Retractable Quick Dry Black Ink Pens | Fine Point Smooth Writing Pens for Nurses,Teachers,Cute Stationery Office&School Supplies,Gifts for Women
20K
▲ 0.0%vs. prior month
$170.8K
latest month
12-month trend
B019QBOFZO
Paper Mate InkJoy Gel Pens, Medium Point, 10 Count - Teacher Supplies, Writing, Journaling, Back to School
10K
▲ 0.0%vs. prior month
$99.7K
latest month
12-month trend
B0008G8G8Y
SAKURA Pigma Micron Fineliner Pens, Black, Assorted Points, 6 Pack
10K
▲ 0.0%vs. prior month
$123.6K
latest month
12-month trend
B0B45RTFQH
UIXJODO Gel Pens, 5 Pcs 0.5mm Black Ink Pens Fine Point Smooth Writing Pens, High-End Series Pens for Journaling Note Taking, Cute Office School Supplies Gifts for Women Men (Morandi)
8K
▲ 0.0%vs. prior month
$59.3K
latest month
12-month trend
B0DLX3SYLP
uniball™ Zento Gel Pens, Black Ink, 0.7mm Medium Point, 4 Count | Retractable, Smooth Writing, Quick-Drying, No Smear, No Bleed, Muted Barrel Colors
7K
▲ 0.0%vs. prior month
$45.1K
latest month
12-month trend
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Best Muji Pen Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
Sharpie is the best-performing muji pen brand in July 2026, moving 50,000 units across 1 ASIN for 41.3% of Top 10 volume. Ddaowanx follows with 20,000 units (16.5%), ahead of Uni-Ball on 11,000 units (9.1%).
With 9 brands splitting the Top 10 and 66.9% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $6.92 to $9.99, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
Sharpie
1 ASIN in Top 10
41.3%
Units
50K
Revenue
$599.5K
Avg. price
$9.99
B082PN4X5J
$9.99·★4.7·84.2K revsSharpie Gel Gel Pens, Black Barrel, Medium Point (0.7mm), Black Gel Ink, 12 Count - Home, Office, School, Journaling, Writing, Note-Taking, Teacher Supplies
Units sold50K
Ddaowanx
1 ASIN in Top 10
16.5%
Units
20K
Revenue
$170.8K
Avg. price
$7.99
B0C9W8DD9S
$7.99·★4.6·9.1K revsDdaowanx Gel Pens,6 Pcs 0.5mm Retractable Quick Dry Black Ink Pens | Fine Point Smooth Writing Pens for Nurses,Teachers,Cute Stationery Office&School Supplies,Gifts for Women
Units sold20K
Uni-Ball
2 ASINs in Top 10
9.1%
Units
11K
Revenue
$75.3K
Avg. price
$6.92
B0DLX3SYLP
$6.89·★4.7·3.4K revsuniball™ Zento Gel Pens, Black Ink, 0.7mm Medium Point, 4 Count | Retractable, Smooth Writing, Quick-Drying, No Smear, No Bleed, Muted Barrel Colors
Units sold7KB0012YVR1O
$6.95·★4.7·15K revsUni-Ball Vision Stick Roller Ball Pens, Fine Point, Black Ink, Pack of 4
Units sold4K
Trending Muji Pen Products — Growth Leaders & New Top 10 Entrants
Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, one ASIN forced its way in: B0F4X8NR2M booked 4K units at $8.99, with ▲ 33.3% MoM change. On the growth side, B0DPN3WQCR leads positive momentum with ▲ 500.0% MoM growth on 300 units, with B09ZK13551 close behind at ▲ 200.0% MoM on 3K units.
The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.
B0F4X8NR2M
Hiacry 8 Pack Gel Pens, Quick-Drying Black Ink, 0.7mm Fine Point Fidget Pen | Smooth Long-Lasting Ink Pens, Stress Relief , No Smear, No Bleed, Journaling, Note Taking ,School Office, Gifts for Men Women
Price
$8.99
Rating
4.6
Reviews
2.4K
Latest month sales
B0DPN3WQCR
10PCs Pastel Gel Ink Pen Set,Retractable Black Ink Pens 0.5mm Fine Point | Smooth Writing, Quick-Drying, No Smear,Black Gel Pens for Writing, Journaling, Note Taking, Home, School, Office Supplies
Price
$9.98
Rating
4.6
Reviews
280
Latest month sales
B09ZK13551
Uniball One Gel Pen 12 Pack; 0.38mm Ultra Micro Black Pens; Gel Ink Pens | Office Supplies Sold by Uniball are Pens; Ballpoint Pen; Colored Pens; Gel Pens; Fine Point; Smooth Writing Pens
Unlock to view ASIN details and product titles
Price
$18.01
Rating
4.5
Reviews
1.4K
Latest month sales
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