Kokuyo Campus Notebook Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Kokuyo Campus Notebook sales on Amazon US totaled 24,300 units in July 2026 (▲ 74.6% vs. the prior month), generating an estimated $346,033 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 76.5% of unit volume and 76.5% of revenue, while a typical listing is priced at $15.13. The keyword itself pulled 30,971 Amazon queries over the same period (▲ 41.6% MoM).
Zooming out to the 12-month window ending July 2026, the kokuyo campus notebook Top 50 moved 208,750 units and $2,863,376 in cumulative sales — an average of 17,396 units and $238,615 per month. Monthly throughput topped out at 80,550 units in August 2025 and dipped to 4,650 in May 2026, leaving the latest reading 69.8% lower than August 2025.
Kokuyo Campus Notebook 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
24.3K
▲ 74.6% MoM
Monthly Revenue 2026/07
$346K
▲ 88.9% MoM
Top 10 Market Share 2026/07
76.5%
Kokuyo Campus Notebook Market Share & Sales Concentration on Amazon US — July 2026
The most-sold kokuyo campus notebook listing on Amazon US in July 2026 is ASIN B0CWS28VK1 (Brand: Five Star), which sold 10,000 units at $12.99 apiece — equal to 41.2% of every unit tracked in this report and 5.0× the volume of the No. 2 listing.
The Top 10 ASINs account for 18,600 units and $264,881 in July 2026 — 76.5% of unit volume and 76.5% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Kokuyo Campus Notebook' on Amazon
July 2026
Is 76.5% Top 10 share highly concentrated?
Ask AI to evaluate competition, market structure, and entry opportunities using ’s tracked Amazon sales, ranking, and keyword data.
Powered by ASINSIGHT MCP · Grounded in ASINSIGHT Amazon data
Top 5 Volume Share breakdown
B0CWS28VK1
Five Star Spiral Notebook + Study App, 100 Sheets, 1 Subject, College Ruled Paper, Fights Ink Bleed, Water Resistant Cover, 820337-ECM, Purple, Pink, White & Green, 8-1/2" x 11", 4 Pack
10K
▲ 25.0%vs. prior month
$128.4K
latest month
12-month trend
B079CY4R9M
Kokuyo Campus Smart Ring Binders 3 Pack, B5 Notebook Binder +100 Sheet 6mm Dot Ruled Refiller Paper, 25 Sheet Capacity, 26 Rings, Light Color, Perfect for Work, Study & Journal
2K
▲ 300.0%vs. prior month
$44.9K
latest month
12-month trend
B0C5J5KMNX
KOKUYO Composition Notebooks, 3 Pack Campus 9-3/4" x 7-1/2" Comp Book with College Ruled, 80 Sheets, Pink Blue Lavender School Lined Notebook Journal for Work Study Note Taking (WSG-NO-308CG1×3)
1K
▲ 42.9%vs. prior month
$14.6K
latest month
12-month trend
B0C5JCJ8JZ
KOKUYO Spiral Notebooks, 3 Pack 10-1/2" x 8" Lined Notebook College Ruled | Campus Subject Notebooks, 80 Sheets, 3 Holes School Japanese Ring Journal for Work Study Note Taking, Pink Blue Green
1K
▲ 66.7%vs. prior month
$16K
latest month
12-month trend
B001GSQZ5Y
KOKUYO Campus B5 Loose Leaf Paper, 6mm Dot Ruled Refill Paper, 100 Sheets | 75gsm Sarasara smooth filler paper in 7.2"x10.2", 26 holes dotted narrow line spacing notebook paper for school, 100/pack
1K
▲ 150.0%vs. prior month
$5K
latest month
12-month trend
B0012O7K8I
KOKUYO Campus Loose Leaf Paper, 5mm Grid 50 Sheets, 7.2×10.2" Filler Paper | Sarasara smooth 5x5 graph B5 refill paper for 26 holes binder notebooks, 75gsm squared paper for math, engineering, drawing
1K
▲ 150.0%vs. prior month
$4.5K
latest month
12-month trend
Unlock to view all Top 50 ASIN competitors and their sales contributions
Best Kokuyo Campus Notebook Brands on Amazon US — Top 2 Brand Sales Concentration (July 2026)
Five Star is the best-performing kokuyo campus notebook brand in July 2026, moving 10,000 units across 1 ASIN for 53.8% of Top 10 volume. KOKUYO follows with 8,600 units (46.2%).
With 2 brands splitting the Top 10 and 100.0% 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 $12.99 to $18.35, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
Five Star
1 ASIN in Top 10
53.8%
Units
10K
Revenue
$128.4K
Avg. price
$12.99
B0CWS28VK1
$12.99·★4.8·2.4K revsFive Star Spiral Notebook + Study App, 100 Sheets, 1 Subject, College Ruled Paper, Fights Ink Bleed, Water Resistant Cover, 820337-ECM, Purple, Pink, White & Green, 8-1/2" x 11", 4 Pack
Units sold10K
KOKUYO
9 ASINs in Top 10
46.2%
Units
8.6K
Revenue
$136.5K
Avg. price
$18.35
B079CY4R9M
$26.40·★4.6·1.8K revsKokuyo Campus Smart Ring Binders 3 Pack, B5 Notebook Binder +100 Sheet 6mm Dot Ruled Refiller Paper, 25 Sheet Capacity, 26 Rings, Light Color, Perfect for Work, Study & Journal
Units sold2KB0C5J5KMNX
$14.39·★4.8·843 revsKOKUYO Composition Notebooks, 3 Pack Campus 9-3/4" x 7-1/2" Comp Book with College Ruled, 80 Sheets, Pink Blue Lavender School Lined Notebook Journal for Work Study Note Taking (WSG-NO-308CG1×3)
Units sold1KB0C5JCJ8JZ
$16.99·★4.8·967 revsKOKUYO Spiral Notebooks, 3 Pack 10-1/2" x 8" Lined Notebook College Ruled | Campus Subject Notebooks, 80 Sheets, 3 Holes School Japanese Ring Journal for Work Study Note Taking, Pink Blue Green
Units sold1KB001GSQZ5Y
$6.89·★4.8·4.9K revsKOKUYO Campus B5 Loose Leaf Paper, 6mm Dot Ruled Refill Paper, 100 Sheets | 75gsm Sarasara smooth filler paper in 7.2"x10.2", 26 holes dotted narrow line spacing notebook paper for school, 100/pack
Units sold1KB0012O7K8I
$5.49·★4.8·2.8K revsKOKUYO Campus Loose Leaf Paper, 5mm Grid 50 Sheets, 7.2×10.2" Filler Paper | Sarasara smooth 5x5 graph B5 refill paper for 26 holes binder notebooks, 75gsm squared paper for math, engineering, drawing
Units sold1KB0012ONGHM
$8.99·★4.8·4K revsKOKUYO Campus Composition Notebook, 1 Pack B5 Lined Notebooks with 100 Sheets 6mm Ruled Paper, 7 x 10 inch Notebook for School and Work, School Supplies Comp Book for Journal Diary
Units sold800B0DX67S17Z
$16.99·★4.8·967 revsKOKUYO Spiral Notebooks, 3 Pack 10-1/2" x 8" Lined Notebook College Ruled | Campus Subject Notebooks, 80 Sheets, 3 Holes School Japanese Ring Journal for Work Study Note Taking, Yellow Orange Purple
Units sold700B0BXPN4GNN
$49.00·★4.4·199 revsKOKUYO Campus Smart Ring Binders 5 Pack, B5 Binder Notebooks, 60 Sheets Capacity, 26 Holes Slim Binder Folder and 300 Sheets Campus Loose-leaf Paper for Work, Study and Journal
Units sold600B079CVCVMQ
$19.98·★4.6·1.8K revsKOKUYO Campus Smart Ring Binders 3 Pack, A5 Binder Notebooks + 100 Campus Loose-Leaf Paper, 25 Sheet Capacity, 20 Ring, Slim Binder Folder for Meeting and Classes, Vivid Color
Units sold500
Trending Kokuyo Campus Notebook 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: B0BXPN4GNN booked 600 units at $49.00, with ▲ 1100.0% MoM change. On the growth side, B07G7C61NH leads positive momentum with ▲ 500.0% MoM growth on 300 units, with B079CY4R9M close behind at ▲ 300.0% MoM on 2K 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.
B0BXPN4GNN
KOKUYO Campus Smart Ring Binders 5 Pack, B5 Binder Notebooks, 60 Sheets Capacity, 26 Holes Slim Binder Folder and 300 Sheets Campus Loose-leaf Paper for Work, Study and Journal
Price
$49.00
Rating
4.4
Reviews
199
Latest month sales
B07G7C61NH
Kokuyo Campus Smart Ring Binder, B5 Light Blue Refillable Binder Notebook 26 Holes with 10 Extra Loose-Leaf Paper, Up to 60 Filler Papers for Work & Study, Japan Import (RU-SP706LB)
Price
$9.43
Rating
4.6
Reviews
1.5K
Latest month sales
B079CY4R9M
Kokuyo Campus Smart Ring Binders 3 Pack, B5 Notebook Binder +100 Sheet 6mm Dot Ruled Refiller Paper, 25 Sheet Capacity, 26 Rings, Light Color, Perfect for Work, Study & Journal
Unlock to view ASIN details and product titles
Price
$26.40
Rating
4.6
Reviews
1.8K
Latest month sales
One Amazon dataset. Two ways to use it.
Every number in this kokuyo campus notebook 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