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Keijiro Otsuka: Amazon KDP author data
As of Nov 6, 2026, Keijiro Otsuka has 3 books on Amazon, 3 of them on a best-seller list in the last 30 days, mostly in Comparative, Economic Policy & Development, Development & Growth.
3Books on Amazon
3Listed in 30 days
4.2Average rating
| Median price | - |
|---|---|
| Price range (middle 50%) | - |
| Median reviews | 4 |
| Total reviews | 9 |
| New books (30 days) | 0 |
| Breakout books (30 days) | 0 |
Keijiro Otsuka's best-ranked books
-
Paths to the Emerging State in Asia and Africa (Emerging-Economy State and International Policy Studies)
by Keijiro Otsuka
- Price$0
- Rating4.7
- Reviews5
- Published2019-01
-
Applying the Kaizen in Africa: A New Avenue for Industrial Development
by Keijiro Otsuka
- Price$0
- Rating3.8
- Reviews4
- Published2018-08
-
Rice Green Revolution in Sub-Saharan Africa (Natural Resource Management and Policy Book 56)
by Keijiro Otsuka
- Price$0
- Reviews-
- Published2023-03
Main categories
FAQ
How many books does Keijiro Otsuka have on Amazon?
KDPTop tracks 3 of their books; 3 made an Amazon list in the last 30 days.
Which categories does Keijiro Otsuka publish in?
Their books chart most often in Comparative, Economic Policy & Development, Development & Growth.
Has Keijiro Otsuka released new books recently?
0 new books in the last 30 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.