Is the kaizen challenge profitable to sell on Amazon United States?

The niche generates $136K/yr across 7 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -28.0%. Flapen's verdict: Skip it (38/100).

How competitive is the the kaizen challenge niche?

5 brands and 8 sellers compete. The top 5 products take 95% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in the kaizen challenge?

Top complaints mined from reviews: Value For Money, Design-Overall, Writing Experience. The return rate is 1.4%.

When does demand for the kaizen challenge peak?

Demand peaks in Jan–Oct–Nov–Dec; the busiest month runs 5.7× the quietest.

What does it cost to enter the the kaizen challenge niche?

Listings span $11.60–$34.99; the average listing price is $23.58 (sweet spot $15–$100). The average incumbent carries 614 reviews — the moat a new listing must climb.

the kaizen challenge

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Avg price

Incredible$23.58

avg listing price — sweet spot $15–$100

Returns

Great1.4%

return rate — above 5% kills the launch gate

Price range

Great$11.60–$34.99

cheapest to priciest tracked listing — scored on the share inside $15–$100

Review moat

Good613.86

avg incumbent reviews — the moat a new listing must climb

Conversion

Good6.4%

search→purchase rate — share of searches ending in a sale

Market size

Okay$136K

$136K/yr · 90K searches

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Growth

Bad-28.0%

90-day search growth — must beat 0% to launch

Competition

Bad95%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Signals Low Review Barrier

According to Flapen's Amazon United States niche tracking, the kaizen challenge is a $136K/yr Amazon United States market (90K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Oct–Nov–Dec. Verdict: Skip it — 38/100.

Data updated Jul 9, 2026 · scored weekly · How we score niches

the kaizen challenge market data

Units sold / yr: 6K–8K; avg 1,000–1,250/product
Revenue / yr: $141K–$189K; units × avg price
Conversion rate: 6.4%
Avg BSR: #194
Page quality: 0%
Prime: 100%
Sponsored: 86%
Out of stock: 0.0%
Avg brand age: 36 months
Avg seller age: 172 days

Competition & brand share

The top 5 products capture 95% of clicks — a locked-up shelf that new listings rarely crack.

Brands

5 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

95%

Top 20: 100%

Open market

Kaizen Challenge44%
Draphy28%
Realizations23%
PRODUCTIVITY STORE3%
RYVE3%

Demand & seasonality

Weekly Amazon search volume, last 71 weeks — -28.0% search growth over the last 90 days.

Peak months: Jan, Oct, Nov, Dec · busiest ÷ quietest = 5.7×

Open Trend

Top the kaizen challenge search terms

kaizen journal21K/yr -16.1%4.0% conv.
the kaizen challenge14K/yr +2.9%8.0% conv.
happy man journal17K/yr -51.3%6.0% conv.
kaizen challenge17K/yr -28.1%8.7% conv.
the happy man journal9K/yr -28.8%4.3% conv.
kaizen challenge journal9K/yr -47.8%5.8% conv.
the kaizen challenge journal4K/yr +38.3%10.7% conv.
mind journal men 2025513/yr -71.9%0.0% conv.

All search terms

Top the kaizen challenge 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 7 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Kaizen Challenge - Self Improvement Journal for Men & Women - Daily Planner and Habit Tracker for Productivity Discipline and Mental Health - 20 Week Life Planner Journal

Kaizen Challenge$34.994.6★166 rev

Self-Mastery Journal for Men with Prompts - 13 Week Guided Gratitude Journal - 5 Minute Journal - Reflection Manifestation Journals for Mindfulness - Self Care Journal - Goal Journal for Women & Men

Realizations$19.464.7★2,050 rev

The Kaizen Journal for Self Improvement Undated Daily Planner & Habit Tracker for Men & Women Productivity Focus & Mental Health 24-Week Goal Planner with Gift-Ready Box (Black)

Draphy$26.904.5★34 rev

Self-Mastery Journal for Men - Gratitude and Productivity Journal for More Happiness Positivity Growth Mindfulness Self Care and Reflection - Guided Inspirational Journals for Men & Women (Black)

Draphy$11.604.6★524 rev

B0DJ7ZPRWY

PRODUCTIVITY STORE$24.884.4★101 rev

Newest

by launch date

The Kaizen Journal for Self Improvement Undated Daily Planner & Habit Tracker for Men & Women Productivity Focus & Mental Health 24-Week Goal Planner with Gift-Ready Box (Black)

Draphy$26.9034 rev

3mo ago

The Kaizen Journal for Self Improvement Undated Daily Planner & Habit Tracker for Men & Women Productivity Focus & Mental Health 24-Week Goal Planner with Gift-Ready Box Two Colors (Original Linen)

Draphy$27.3334 rev

3mo ago

Kaizen Challenge - Self Improvement Journal for Men & Women - Daily Planner and Habit Tracker for Productivity Discipline and Mental Health - 20 Week Life Planner Journal

Kaizen Challenge$34.99166 rev

1y ago

B0DJ7ZPRWY

PRODUCTIVITY STORE$24.88101 rev

1y ago

Self-Mastery Journal for Men - Gratitude and Productivity Journal for More Happiness Positivity Growth Mindfulness Self Care and Reflection - Guided Inspirational Journals for Men & Women (Black)

Draphy$11.60524 rev

2y ago

What buyers say about the kaizen challenge

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall20%

“Excellent product”

Ease Of Use14%

“Easy to use”

Document Organizing/Classification12%

“Very well organized diary book”

Paper Quality12%

“the paper is thick enough that colored ink pens don't bleed through to the next page”

Design-Overall8%

“Clean design, great quality”

Size-Overall4%

“great convenient size for travel”

Writing Experience4%

“a good textured feel for writing”

Advertised Vs Actual Product3%

“As described”

Instructions/User Manual/Troubleshooting3%

“the entries are very straightforward”

Durability2%

“durable”

What buyers complain about

Value For Money10%

“worth a 1/3 of the price at best”

Design-Overall8%

“Good product it just needs a better layout, more personal and Taylored to individuals”

Writing Experience8%

“im a bit of a sloppy writer”

Size-Overall8%

“And its smaller than I thought it would be its not real big and bulky”

Advertised Vs Actual Product4%

“not true per the description”

Image/Picture Clarity4%

“Apologies if the photos are a bit blurry”

Color4%

“she received the linen color which was a disappointment”

Durability3%

“can't use for a full year”

Paper Quality3%

“the paper is too thin”

Display Colors2%

“Received wrong color”

Top return reasons

Size-Overall27%

Advertised Vs Actual Product24%

Value For Money12%

Instructions/User Manual/Troubleshooting6%

Product Condition4%

Design-Overall4%