kokuyo planner
Skip itSoft demand (-49.1% this quarter) — this niche doesn't clear our bar today.
Market size
Incredible$2.8M$2.8M/yr · 5.4M searches
Avg price
Incredible$33.97avg listing price — sweet spot $15–$100
Review moat
Great231.03avg incumbent reviews — the moat a new listing must climb
Price range
Great$9.05–$77.50cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Good43%top-5 click share — leaders hold, buyers still browse
Returns
Okay3.5%return rate — above 6% kills the launch gate
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Conversion
Bad1.5%search→purchase rate — share of searches ending in a sale
Growth
Bad-49.1%90-day search growth — must beat 0% to launch
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, kokuyo planner is a $2.8M/yr Amazon United States market (5.4M searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 47/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
Market data
- Units sold / yr
- 60K–80K
- avg 1,500–2,000/product
- Revenue / yr
- $2.0M–$2.7M
- units × avg price
- Launch success
- 65%
- 11 of 17 new (360d)
- Conversion rate
- 1.5%
- Avg BSR
- #1,266
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 55%
- Out of stock
- 50.8%
- Avg brand age
- 40 months
- Avg seller age
- 167 days
Competition
The top 5 products take 43% of clicks — established leaders, but buyers still shop beyond them.Brands
4 falling
Sellers
92
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
43%
Top 20: 87%
Open market
0%
- ほぼ日86%
- receip11%
- MUJI2%
- Fromthenon1%
Demand
Weekly Amazon search volume, last 16 weeks — -49.1% search growth over the last 90 days.Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 31 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Hobonichi Techo 2026 Original Book A6 English Daily January Start Monday Start Planner
ほぼ日$38.254.7★413 rev
Hobonichi Techo 2026 Cousin Book A5 Japanese Daily April Start Monday Start Planner
ほぼ日$64.184.8★57 rev
Undated Weekly Planner Notebook Pocket Organizer Appointment Book Journal Notebook A6 Week Plan Notepad (Beige)
receip$12.644.4★386 rev
Hobonichi Techo 2026 Cousin Book A5 Japanese Daily Weekly Jan Start Mon Start Planner
ほぼ日$50.604.7★58 rev
Hobonichi Techo 2026 Cousin Avec Book A5 Japanese Daily 6-month only July Start Monday Start Planner
ほぼ日$36.764.9★15 rev
Newest
by launch dateHobonichi Techo 2026 Cousin Avec Book A5 Japanese Daily 6-month only July Start Monday Start Planner
ほぼ日$36.7615 rev
Hobonichi Techo 2026 Original Avec Book A6 Japanese Daily 6-month only July Start Monday Start Plannerr
ほぼ日$22.819 rev
Hobonichi Techo 2026 Cousin Book A5 Japanese Daily April Start Monday Start Planner
ほぼ日$64.1857 rev
Hobonichi Techo 2026 Original Book A6 Japanese Daily April Start Monday Start Planner
ほぼ日$39.9535 rev
Hobonichi Techo 2026 Spring Weeks Colors: Sky Mist (Japanese Tall & Slim April Start)
ほぼ日$35.9151 rev
Trending
90-day click momentum![Hobonichi Techo A6 Tamagotchi Techo Discovered! [English Original book]](https://m.media-amazon.com/images/I/51eIOLbmX2L.jpg)
Hobonichi Techo A6 Tamagotchi Techo Discovered! [English Original book]
ほぼ日$59.874.4★
Hobonichi Techo 2026 Original Avec Book A6 Japanese Daily 6-month only July Start Monday Start Plannerr
ほぼ日$22.814.4★
Hobonichi Techo 2026 Cousin Avec Book A5 Japanese Daily 6-month only July Start Monday Start Planner
ほぼ日$36.764.9★
Undated Weekly Planner Notebook Pocket Organizer Appointment Book Journal Notebook A6 Week Plan Notepad (Pink with cover)
receip$15.464.4★
Hobonichi Techo 2026 Cousin Book A5 Japanese Daily April Start Monday Start Planner
ほぼ日$64.184.8★
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Great for organizing”
“Beautiful paper”
“Fits perfectly”
“Arrived quickly, great quality”
“Great price”
“has a nice clean design”
“exactly what I wanted”
“Easy to use”
“Holding up well through daily use”
“Wife loves writing everything is this thing”
What buyers complain about
“Too expensive”
“Small”
“Paper is a little thinner than expected”
“thick”
“Not durable”
“Was worried about ink bleeding through the pages because they are so thin”
“this listing is inaccurate”
“cheap quality”
“Im a little disappointed because it appears to be already used or dirty”
“It was wrinkled”
Top return reasons
Common questions
- Is kokuyo planner profitable to sell on Amazon United States?
- The niche generates $2.8M/yr across 31 tracked products. 11 of 17 products launched in the last 360 days are still selling. 90-day search growth is -49.1%. Flapen's verdict: Skip it (47/100).
- How competitive is the kokuyo planner niche?
- 4 brands and 92 sellers compete. The top 5 products take 43% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in kokuyo planner?
- Top complaints mined from reviews: Value For Money, Size-Overall, Paper Quality. The return rate is 3.5%.
- What does it cost to enter the kokuyo planner niche?
- Listings span $9.05–$77.50; the average listing price is $33.97 (sweet spot $15–$100). The average incumbent carries 231 reviews — the moat a new listing must climb.
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