Twsbi Eco Fountain Pen Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Twsbi Eco Fountain Pen sales on Amazon US totaled 19,650 units in July 2026 (▼ 3.9% vs. the prior month), generating an estimated $304,532 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 67.2% of unit volume and 59.8% of revenue, while a typical listing is priced at $22.67. The keyword itself pulled 22,570 Amazon queries over the same period (▲ 31.0% MoM).
Zooming out to the 12-month window ending July 2026, the twsbi eco fountain pen Top 50 moved 245,700 units and $4,095,716 in cumulative sales — an average of 20,475 units and $341,310 per month. Monthly throughput topped out at 32,650 units in December 2025 and dipped to 10,300 in May 2026, leaving the latest reading 6.8% higher than August 2025.
Twsbi Eco Fountain 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
19.6K
▼ 3.9% MoM
Monthly Revenue 2026/07
$304.5K
▼ 9.4% MoM
Top 10 Market Share 2026/07
67.2%
Twsbi Eco Fountain Pen Market Share & Sales Concentration on Amazon US — July 2026
The most-sold twsbi eco fountain pen listing on Amazon US in July 2026 is ASIN B004QHI43S (Brand: SAKURA), which sold 4,000 units at $15.85 apiece — equal to 20.4% of every unit tracked in this report and 2.0× the volume of the No. 2 listing.
The Top 10 ASINs account for 13,200 units and $182,254 in July 2026 — 67.2% of unit volume and 59.8% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Twsbi Eco Fountain Pen' on Amazon
July 2026
Is 67.2% Top 10 share highly concentrated?
Ask AI to evaluate competition, market structure, and entry opportunities using ’s tracked Amazon sales, ranking, and keyword data.
Powered by ASINSIGHT MCP · Grounded in ASINSIGHT Amazon data
Top 5 Volume Share breakdown
B004QHI43S
SAKURA Pigma 30067 Micron Blister Card Ink Pen Set, Black, 8/Set
4K
▼ 20.0%vs. prior month
$62.4K
latest month
12-month trend
B07KBVCTR3
PILOT Kakuno Fountain Pen, Clear Barrel, Medium Nib 0.5mm | Writing for taking notes, beginner fountain pen, hexagonal barrel, easy hold, writing pens
2K
▲ 100.0%vs. prior month
$25K
latest month
12-month trend
B07Y8KN5QD
Matte Black Forest Fountain Pen Extra Fine Nib Classic Design with Converter and Metal Pen Box Set by Asvine
1K
▲ 0.0%vs. prior month
$16.4K
latest month
12-month trend
B09ZXVXPSF
EYEYE Fountain Pens for Writing, 8 Pack Assorted Colors Fine Point Disposable Fountain Pens Stainless Steel Nib, Smooth Writing for Journaling, Drafting, Sketching, Doodling & Gifts
1K
▲ 0.0%vs. prior month
$9K
latest month
12-month trend
B0F6M4L9H9
uniball™ one P Retractable Gel Pens, Micro Point (0.5mm), Black, 2 Pack | Pocket-size design, ink stays on top of paper fibers for crisp lines, wire pocket clip, color indicator top, rubber grip
1K
▲ 0.0%vs. prior month
$9K
latest month
12-month trend
B0DP68D4QR
PILOT Kakuno Fountain Pen Madoromi Color Series, Gold (Smiley Face) Fine Nib, Perfect for Beginners and Creative Expression, Pink, PFKA-1MDPF
1K
▲ 25.0%vs. prior month
$13.6K
latest month
12-month trend
Unlock to view all Top 50 ASIN competitors and their sales contributions
Best Twsbi Eco Fountain Pen Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
PILOT is the best-performing twsbi eco fountain pen brand in July 2026, moving 6,200 units across 6 ASINs for 47.0% of Top 10 volume. SAKURA follows with 4,000 units (30.3%), ahead of Asvine on 1,000 units (7.6%).
With 5 brands splitting the Top 10 and 84.8% 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 $13.85 to $16.99, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
PILOT
6 ASINs in Top 10
47.0%
Units
6.2K
Revenue
$85.5K
Avg. price
$13.85
B07KBVCTR3
$11.69·★4.6·4.5K revsPILOT Kakuno Fountain Pen, Clear Barrel, Medium Nib 0.5mm | Writing for taking notes, beginner fountain pen, hexagonal barrel, easy hold, writing pens
Units sold2KB0DP68D4QR
$13.70·★4.7·238 revsPILOT Kakuno Fountain Pen Madoromi Color Series, Gold (Smiley Face) Fine Nib, Perfect for Beginners and Creative Expression, Pink, PFKA-1MDPF
Units sold1KB00092PRCA
$14.18·★4.6·10.4K revsPILOT Precise Varsity Pre-Filled Fountain Pens, 1.0mm, Multicolor, 7-Pack | Everyday writing made easy, smooth writing pens for school, medium point stainless steel nib, pens assorted color ink
Units sold1KB00AEUWPF4
$18.90·★4.8·1.5K revsPILOT Iroshizuku Bottled Fountain Pen Ink, Take-Sumi, Bamboo Charcoal (Black) 50ml Bottle (69224)
Units sold800B0DT4ZN58L
$12.71·★4.8·174 revsPILOT Kakuno Fountain Pen, Pink Barrel, Fine Nib
Units sold800B07KBN9YTK
$11.89·★4.6·4.5K revsPILOT Kakuno Fountain Pen, Clear Barrel, Extra Fine Nib 0.3mm | Writing for taking notes, beginner fountain pen, hexagonal barrel, easy hold, writing pens
Units sold600
SAKURA
1 ASIN in Top 10
30.3%
Units
4K
Revenue
$62.4K
Avg. price
$15.85
B004QHI43S
$15.85·★4.8·65.2K revsSAKURA Pigma 30067 Micron Blister Card Ink Pen Set, Black, 8/Set
Units sold4K
Asvine
1 ASIN in Top 10
7.6%
Units
1K
Revenue
$16.4K
Avg. price
$16.99
B07Y8KN5QD
$16.99·★4.5·17.6K revsMatte Black Forest Fountain Pen Extra Fine Nib Classic Design with Converter and Metal Pen Box Set by Asvine
Units sold1K
Trending Twsbi Eco Fountain 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: B07KBN9YTK booked 600 units at $11.89, with ▲ 20.0% MoM change. On the growth side, B07KBVCTR3 leads positive momentum with ▲ 100.0% MoM growth on 2K units, with B00IOOOBWC close behind at ▲ 100.0% MoM on 200 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.
B07KBN9YTK
PILOT Kakuno Fountain Pen, Clear Barrel, Extra Fine Nib 0.3mm | Writing for taking notes, beginner fountain pen, hexagonal barrel, easy hold, writing pens
Price
$11.89
Rating
4.6
Reviews
4.5K
Latest month sales
B07KBVCTR3
PILOT Kakuno Fountain Pen, Clear Barrel, Medium Nib 0.5mm | Writing for taking notes, beginner fountain pen, hexagonal barrel, easy hold, writing pens
Price
$11.69
Rating
4.6
Reviews
4.5K
Latest month sales
B00IOOOBWC
PILOT Kakuno Fine-Nib Fountain Pen, White Body Soft Violet Cap Body (FKA-1SR-SVF)
Unlock to view ASIN details and product titles
Price
$9.99
Rating
4.7
Reviews
310
Latest month sales
One Amazon dataset. Two ways to use it.
Every number in this twsbi eco fountain pen report comes from the Amazon market data ASINSIGHT tracks. Pick how you want to work with it.
Explore the full data
Browse the complete, structured picture in a ready-made interface — and keep tracking it as the market moves.
- Organic vs. ad traffic shifts per product
- Hourly rank and search-volume tracking
- Competitor ASINs and historical trends
Starts with a free ASINSIGHT account
Analyze the data your way
Connect the same data to ChatGPT, Claude or Cursor, then combine any dimensions to answer your own questions.
- Combine product, keyword, sales & ranking data freely
- Follow up in your own words, no fixed reports
- Works in ChatGPT, Claude & Cursor
20,000 credits/mo free, no credit card