Japanese — Kindle Category Opportunity
Competition snapshot for the Foreign Languages best-seller list, ease-of-entry score 60.0/100.
Category metrics
Score
60.0
Median reviews
30
Weak share (top 20)
50%
Median price
$6.49
Median star rating
4.4
Books scanned
50
Worth writing in?
Japanese sits below our demand gate: 50% of the top 20 is under-reviewed, but overall reader activity is thin too. It can be a quiet corner to build in slowly — validate demand with keyword lookups before committing a series. Ease-of-entry score 60.0/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 8 | Sexy Lingerie Photo Book: Seductive Lingerie (Japanese Edition) | — | 0 | $2.99 |
| 5 | Learn Japanese with 120 Short Stories - 4 Books in 1: A Story-Based Reading Method for Adults with a Step-by-Step 120-Day Action Plan to Progress from ... in Just 30 Minutes a Day (Japanese Edition) | 5.0 | 1 | $0.99 |
| 12 | Trial Version THE LET THEM THEORY Just Let It Be Dont Waste Your Life on Things You Cant Control (Japanese Edition) | 5.0 | 3 | $0.99 |
| 11 | The collection of photographs of MIZUKI YAMASAKI The Legend of Beautiful Girl (IDOL REGEND) (Japanese Edition) | 3.3 | 12 | $3.06 |
| 3 | BEST1 hip (Japanese Edition) | 4.0 | 23 | $2.99 |
High-frequency phrases in this category's titles
Mine all categoriesHigh-frequency phrases mined from the 50 best-seller titles on this category's list. The ease-of-entry score tells you how winnable the category is; these title phrases tell you which words readers search with — use the two layers together. Frequency is a title statistic, not a search-volume estimate.
| Phrase | Titles | Rank-weighted score |
|---|---|---|
| course in elementary japanese | 2 | 81 |
| genki an integrated course | 2 | 81 |
| integrated course in elementary | 2 | 81 |
| learn japanese | 2 | 59 |
| harry potter | 2 | 54 |
| crystal hunters japanese | 2 | 46 |
| embroidery pattern | 2 | 21 |
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More Foreign Languages categories
29 subcategories under this category
| Subcategory | Score | Median reviews |
|---|---|---|
| █████ | 90.0 | 1 |
| █████ | 89.0 | 2 |
| █████ | 87.5 | 6.5 |
| █████ | 87.0 | 1 |
| █████ | 87.0 | 4 |
| █████ | 85.5 | 12 |
| █████ | 85.0 | 3 |
| █████ | 84.5 | 4 |
| █████ | 83.5 | 1 |
| █████ | 81.0 | 6 |
| █████ | 79.0 | 2.5 |
| █████ | 79.0 | 6 |
| █████ | 78.5 | 16 |
| █████ | 76.5 | 22.5 |
| █████ | 73.0 | 20 |
| █████ | 72.0 | 12 |
| █████ | 70.5 | 5 |
| █████ | 68.5 | 10.5 |
| █████ | 67.5 | 12 |
| █████ | 65.5 | 20.5 |
| █████ | 65.0 | 11.5 |
| █████ | 61.0 | 11 |
| █████ | 61.0 | 17.5 |
| █████ | 60.0 | 40.5 |
| █████ | 59.0 | 56 |
| █████ | 59.0 | 26 |
| █████ | 58.0 | 28 |
| █████ | 57.5 | 21.5 |
| █████ | 49.5 | 5 |
Subcategory names are visible after sign-in — a free account unlocks every subcategory score.
Sign up free to unlockCheck the keywords before you write
Category scores show where entry is easiest; keyword lookups show whether readers actually reach for it. A free account includes keyword competition lookups plus unlimited category scans.
After you publish: why aren't readers buying?
Category research picks the direction; review diagnosis reads the readers. The same platform clusters a book's critical reviews into severity-ranked root causes, each anchored to verbatim quotes — see it applied to a full narrative-history title.
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Research snapshot scanned on Oct 19, 2026. Refreshed periodically — not live tracking.